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| HIGH SPEED Modem and FAX FAMILY CH2056/TBR/ETBR CH1799/TBR/ETBR CH1794 FEATURES * * * * * * * * * * * * * * * * * * * - - - V.90 / 57,600bps/TBR21 V.34bis / 33,600bps/TBR21 V.32bis / 14,400bps The HS Modem family is pin compatible with Cermetek's low cost CH1786 V.22bis, 2400bps modem family. Each module in the HS Modem family is a self-contained modem and is FCC Part 68 approved and Canadian DOT approvable. Additionally, the CH1799TBR/ETBR and the CH2056TBR/ETBR products meet the European TBR21 requirements. These ultra small modules are designed for PCB through-hole mounting and are 1.35" x 1.38" x 0.61" (nominal, 0.55" upon request) in size. The HS Modem family requires only two external interfaces: a CCITT V.24 serial interface for direct access to a UART, and a Tip and Ring RJ-11C Jack for the PSTN line connection. The HS Modem can be controlled with industry standard AT commands and is compatible with available industry communication software. Supports V.90, V.34bis, V.34, V.32bis, V.32, V.22bis, V.22A/B, V.23, V.21, Bell 212A and 103. CH2056 supports V.80 Synchronous operation. Error correcting: V.42 LAMP, MNP 2-4 and MNP10. Data Compression: V.42bis and MNP 5 MNP10 Data through put enhancement for cellular operation. DTE serial interface with speeds up to 230.4kbps (CH2056), 115.2 (CH1799) or 57.6kbps (CH1794). Automatic baud rate adaptability utilizing speed sensing, flow control and data buffers. Send & Receive FAX class 1, Group 3 supported. Serial V.24, 5 volt interface. NVRAM directory and stored profiles. AT Command structure, with extensions. Built-in DAA with 1500 VAC RMS isolation 2122V peak surge protection. UL 1950 and CSA C22.2 950 Recognized (E104957). Leased Line version available CH1799LL FCC part 68 Approved/DOT CSA CS-03 Part I Approvable. +5 Volt operation with zero power option Small size: 1.35" x 1.38" x 0.61" (nominal, 0.55" upon request). Pin compatible with low speed/low cost CH1786 TBR21 compliant versions available: CH1799TBR/ETBR and CH2056TBR/ETBR. DESCRIPTION OF FUNCTIONAL BLOCKS AND DISCUSSION OF BASIC OPERATIONS Figure 1 contains a functional block drawing of the HS Modem family of products. Each HS Modem product consists of a serial interface buffer, modulator/demodulator, modem controller with error correction and data compression, non-volatile RAM and a DAA. INTRODUCTION The CH2056, CH1799 and CH1794 (HS Modem Family) are industrial grade high-speed modem modules. Each HS Modem product supports a range of modem standards and speeds from 300bps to 14,400bps, 28,800bps, 33,600bps or 57,600bps. By using built in compression algorithms the operation speed can be expanded to the maximum DTE rate of 57.6kbps for the CH1794, 115.2kbps for the CH1799 and 230.4kbps for the CH2056. A choice of error correcting schemes is available including MNP 10 for cellular telephone applications. The HS Modem family supports Send and Receive FAX. The CH1799LL operates exclusively on non-voltage bearing leased line. 2003 Cermetek Microelectronics, Inc. Page 1 Figure 1. Functional Block Diagram of HS Modem Family. Serial Host Interface Buffer. The HS Modem utilizes a serial V.24 EIA 232-E 5V interface to control the modem. The HS Modem products can communicate over the serial interface with the Data Terminal Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family Equipment (DTE) at a fixed speed regardless of the carrier line modulation speed (DCE) of the PSTN modem connection. This eliminates the need to have the DTE step up or step down in speed based on the in-coming or out-going PSTN communication data rate. Hence, the DTE can train the CH2056, to say 56kbps, and talk to a slower in-coming data connection at say, 2400bps without changing host speed. Conversely, the host DTE trained at 14.4kbps can also communicate with the modems at higher speeds, say 28.8kbps. This is accomplished by invoking internal automatic data flow control. The HS Modem family has a resident buffer to allow for this auto baud operation. Non-Volatile RAM (NVRAM). NVRAM can store user-customized configurations. The AT&Wn command will store the active modem configuration in one of two NVRAM locations as selected by an n of 0 or 1. The AT&Yn command selects one of the stored modem configurations to be automatically recalled and made active upon reset or power up. The ATZn command immediately recalls and activates a stored configuration. See Tables 7A and 7B for storable SRegisters and Commands. The NVRAM can save up to four telephone numbers, with up to 31 digits or modifiers in each telephone number. The AT&Zn=s command will store s, the telephone number dial string. The ATDS=n command will cause the modem to dial one of the four stored telephone numbers. The NVRAM storage location for the four telephone numbers is selected by an n of 0, 1, 2, or 3. Telephone Line Interface or DAA. High performance modems are extremely sensitive to DAA (Data Access Arrangement) performance. The difference between a good modem and a fair one is in the DAA performance. The HS Modem family includes a unique low distortion DAA designed for optimal performance over all PSTN line conditions thereby achieving the most reliable and best performance PSTN connections. The HS Modem family is designed to meet North American telephone standards as set by the FCC Part 68 (USA) and CSA CS-03 Part I (Canada). Among the more critical parameters, the PSTN line interface is designed to meet 1500 VAC RMS isolation and provide 2122V peak surge protection. Consequently, the HS Modem family of products satisfies U.S. and Canadian requirements, and will meet other international approval agency requirements that specify these levels of isolation. The TBR/ETBR variants also meet the European TBR21 requirements. Pins 1 and 2 function as both input and output connections to the PSTN. To maximize field reliability in hostile environments, for Canadian approval, for UL 2003 Cermetek Microelectronics, Inc. Page 2 compliance, and also optionally for FCC Part 15 compliance, these two pins must be routed through an external network such as that briefly described in Figure 6A and described in more detail in Cermetek Application Note # 126. Each HS Modem product comes with FCC Part 68 approval and is shipped from the factory with an FCC Label indicating registration number and ringer equivalent. This label should be prominently displayed on the end product. With the exception of the U.S., most countries (including Canada) require submission of the final product or system containing the HS Modem to the appropriate governing regulatory agency for approval. Typically this is accomplished by submitting the final end product to an independent test house or consultant for evaluation. The test house/consultant then forwards the test results and applicable documents to the regulatory agency. Contact Cermetek for a list of suggested consultants. Modulation/Demodulation/Error Correcting and Data Compression. These functions are provided by an industry standard modem chip set which has been adapted for use with the HS Modem family. The Modulation/Demodulation scheme supports the industry modem standards listed below. SUPPORTED MODULATION STANDARDS Bell 103 CCITT V.22 Bell212A CCITT V.22bis CCITT V.32 CCITT V.32bis CCITT V.34 CCITT V.34bis CCITT V.90 The HS Modem supports V.42 LAMP, MNP 2-4, MNP 10 error correcting protocols. The CH1794 uses MNP5 data compression techniques and the CH1799/CH2056 uses V.42bis data compression, allowing data transmission rates of up to a maximum of 57.6kbps/115.2kbps/230.4kbps, respectively. These high DTE data rates are supported by the HS Modem serial interface via its auto baud capability. Note that the maximum speed attained is limited by the maximum speed available from the DTE. The resident Modulator/Demodulator supports line equalization and forward error correction. IMPORTANT NOTE The V.90 standard prescribes 56kbps downlink and 33.6kbps uplink. Consequently, two V.90 modems connected back-to-back will send at 33.6kbps. Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family CONNECTING TO THE HOST UART Since a modem communicates data serially and most host products handle data in a parallel format, a UART is needed to make parallel-to-serial and serial-toparallel translations. Modem is powered down. The internal blocking diode provides supply isolation. The pins of the HS Modem will be in an undefined state when powered is switched off. This must be taken into consideration to assure that no unwanted signals are presented to the HS Modem during power down. SUPPORTED FEATURES AT Command Set. The HS Modem supports the AT Command set with extensions and can operate with industry standard communication software. The AT Commands are compatible with TR302.2/88-08006. Serial Host Interface. The HS Modem family operates in asynchronous mode and supports a 5V, RS232- like interface called V.24 (EIA-232-E). The HS Modem supports a full RS-232C/V.24 serial interface. Signal levels are TTL rather than RS-232C level compatible, which allows direct connection of the HS Modem to the host's UART without level translating circuitry. See Table 3 for a complete set of pin descriptions. The modem is controlled by sending serial commands over TXD and by monitoring serial status messages returned on RXD. All other serial interface lines may be utilized for the convenience of a particular application but are not required by the modem. Unused outputs from the HS Modem should be left unconnected. Unused inputs should be tied to the proper logic level. See Table 3. Speaker Interface. The SPK output reflects the receiver analog input and provides a signal that can be used to monitor call progress. The SPK signal can drive a 300-ohm load directly. Typically, the SPK signal is input into an audio power amplifier and the amplifier, in turn, drives the speaker coil. The speaker is activated with the ATM command. The speaker volume is adjusted using the ATLn command; where n is 0, 1, 2, or 3. Increasing numbers correspond to higher volume. Figure 3 indicates one method of driving an external 8-ohm speaker. Zero Power Mode. If an application calls for zero power during standby periods, the power may be switched off using external circuitry and then reapplied when the HS Modem's RI pin becomes active. The HS Modem can thus be powered down to zero. Referring to Figure 2, the controller activates the relay switch, supplying power (+5V) to the HS Modem. In this configuration, the ring signal is used to "wake up" the HS Modem when the HS Modem is in the power down state. The internal structure of the RI pin consists of an open collector opto transistor with a 30k ohm pull-up through a blocking diode to 5V. The user should apply his own pull-up resistor to an active 5V source when the HS 2003 Cermetek Microelectronics, Inc. Page 3 Figure 2. Zero Power Operation. Power Supply. The HS Modem module is a complex set of sensitive subsystems. During the course of normal operation, the HS Modem decodes analog signals from the telephone line that are in the millivolt range. Steps must be taken by the user to guarantee that power supply noise on all supply lines, including ground, does not exceed 25mV peak to peak. If necessary, use dedicated power and ground planes. Failure to provide such operating conditions could cause the HS Modem to malfunction or to function erratically. The HS Modem family requires +5V 5% supply. It is recommended that bypass capacitors be placed on the power supply as close to the HS Modem's supply input pins as practical. It is recommended that a 10 F or greater tantalum capacitor in parallel with a 0.1 F ceramic capacitor be used. The user must also provide shielding from nearby sources of EMI, such as relays, motors and other power supplies. Automatic Speed/Format Sensing. The HS Modem supports both Command and Data modes of operation. The HS Modem can automatically determine the speed and format of the data sent from the DTE over the serial interface; and can sense the following broad range of speeds: Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family CH1794 CH1799 CH2056 300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 19200, 38400, and 57600bps. 300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24000, 26400, 28800, 38400, 57600, and 115200bps. 300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24000, 26400, 28800, 38400, 57600, 115200, and 230400bps. for an alternative voice/tone implementation that utilizes dual supply operational amplifiers. Table 2. HS Modem Auto Configuration Based on DTE Configuration. DTE Configuration HS Modem Configuration 7 mark 7 none 7 space 8 none 8 mark 8 none 8 space 8 even The data formats in Table 1 are recognized by the HS Modem family of products. Table 1. Data Formats Recognized by HS Modem Family. No. of Character Data Length Stop Length Parity (No. of Bits) Bits (No. of Bits) None 7 2 10 Odd 7 1 10 Even 7 1 10 None 8 1 10 Odd 8 1 11* Even 8 1 11* *11 bit characters are sensed, but the parity bits are stripped off during data transmission in Normal and Error Correction modes. The HS Modem can sense data with mark or space parity and configures itself as described in Table 2. The HS Modem is trained to a selected speed with an AT 2003 Cermetek Microelectronics, Inc. Page 4 Figure 3. Speaker Control Circuit. All HS Modem products are designed with pin T1 coupled directly to the internal DAA. When using the HS Modem in data mode, T1 should float and be disconnected from any potential signal because any signal on T1 during data operation will affect the HS Modem's output. If T1 is being asserted from another application, use a relay or zero impedance switch to disconnect T1 when in data mode. When voice and data are both being used, and the T1 pin is active, it is typical for voice communication to precede data communication. In this case, the following commands should be used to configure the HS Modem to allow for full utilization of the Voice/Tone injection feature. These commands disable autoanswer and eliminate hang-up due to lack of carrier signal. 1. Enter: ATS0=0 1. To answer a voice call: (a) Enter: ATH1 Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family 2. To switch to data mode, switch local voice source from T1: (a) At the Originate Modem, enter: ATX1 The escape sequence consists of a "guard time" (a period where no characters are sent to the modem), followed by 3 escape characters, followed by a second guard time. At power-up, the guard time is set to 1 second, and the escape character is set as "+." Note that a 50 msec delay is required between escape characters. These two parameters can be modified via registers S2 and S12, respectively. The HS modem will stay off-hook with its carrier on after the escape sequence is received. The HS Modem will return an OK status message when it is ready to accept commands. To put the HS Modem back into data mode, issue command ATO MODEM CONTROL The HS Modem may be controlled by sending serial ASCII command sequences. The commands are sent to the modem serially on the TXD pin. After execution of a received command, the modem returns a serial status message that completion status. Refer to Table 5A, 5B and 5C for a complete list of status messages. THE COMMAND FORMAT HS Modem commands consist of three elements: 1. The attention sequence, 2. The commands themselves and 3. A terminating carriage return. Enter: Result: ATDT1234567 MODEM STATES The HS Modem can be in either command mode or data mode. When the modem is idle, it is in command mode by default and will recognize commands. When data transmission is in progress, the HS modem is in the data mode state and will not recognize commands. To force the HS Modem to recognize commands, the host must send an "escape sequence" to the HS Modem forcing it out of data mode and into command mode. WARNING The HS Modem family of products has been FCC Part 68 approved as data/FAX modems. Utilization of the Voice/Tone Port requires further registration. The FCC requires that the entire system, including the HS Modem and the handset or DTMF transceiver, adhere to Part 68 rules. TIP ANALOG VOICE INJECTED SIGNALS T1 RING RJ-11 JACK SPK HS MODEM RXD V.24 EIA-232-E INTERFACE OR UART DCD DSR RI CTS TXD DTR FAMILY SPEAKER CONTROL NOTE: SPEAKER CONTROL AND PHONE CONTROL ARE ANCILLARY CIRCUITS SHOWN ELSEWHERE IN THIS DATA SHEET. *SIGNAL GND MUST BE CONNECTED TO EARTH GROUND Vcc 3 RI 2 + 4 10K 8 Vcc 1 LM393 LM393 4.7uF 5 6 + Isolated Envelope Ring Detect 4.7K 7 22K EXTERNAL RESET RST +5V GND .1uF 10K Figure 4. HS Modem Family Application Diagram. 2003 Cermetek Microelectronics, Inc. Page 5 Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family AT [Commands] Step 2. Initial Modem Training. The modem must be trained to the host DTE speed and parity (odd, even, mark, space or none). These activities are briefly described below. HS Modem Reset. Upon applying power to the HS Modem, the HS Modem automatically generates an internal reset pulse. The user can also reset the modem externally by applying a high-going reset pulse to the RST pin for at least 10 msec after the +5V power supply has stabilized. Delay sending commands to the HS Mode for 2 seconds after reset has been initiated to allow the HS Modem time to properly reconfigure. On power up, or when reset is initiated either by the ATZ STATUS MESSAGES AND RESULTS CODES A result code is issued by the HS Modem to the DTE for all commands executed by the HS Modem except dialing commands. Further, various activities on the PSTN are also signaled to the DTE by the HS Modem. All result codes have either a terse, short form version (which is identified by a number followed by a Document No. 607-0003 Revision K3 (09/03) INITIALIZING THE MODEM Before commands may be sent to the HS Modem, the modem must be initialized. This is a two step process: Step 1. Modem Reset. This is accomplished by applying a hardware-reset pulse to pin RST or by switching the power off then back on. 2003 Cermetek Microelectronics, Inc. Page 6 Cermetek Microelectronics, Inc. High Speed Modem and FAX Family code 0) or the command is valid or accepted, or with an ERROR (result code 4) if the command is not recognized. The detail contained in the error result codes signaled to the DTE depends on the level of message suppression employed by the user. As can be seen from Tables 5A, 5B and 5C, specifying X4 allows the HS Modem to utilize the entire range of non-extended messages, whereas X0 suppresses all but the very basic result codes. Most of the result codes allowed under X1, X2 and X3 are considered call progress status codes and, in practice, are suppressed except for the case of debugging activities. It is recommended that the non-extended result codes be used in all cases. It should be noted that the default connect result codes 9-20 indicate DTE connection speed, not Carrier Line DCE speed. Hence, a CH1794 will connect at a maximum speed of 19.2kbps (result code 16). The CH1799 will connect at a maximum DTE speed of 38.4kbps (result code of 17) and the CH2056 will connect at a maximum speed of 57.6kbps (result code 18) unless the DTE is forced to a higher speed by selection of data compression. In this case, the maximum DTE to modem speed is 230.4kbps (result code20). Extensions to the basic result code set may be specified by Register S95, which allows for the use of result codes 40-64, 165-194. IMPORTANT NOTE Result codes 53-64 are supported by the CH1799 and CH2056. Result codes 165-194 are only supported by the CH2056. To obtain a detailed status report for a given modem communication configuration, use the AT\V1 command. Executing this command at setup will cause the modem to connect and return a message on line consisting of recommended in Figure 6B and in Cermetek Application Note # 126. Follow all applicable requirements for FCC Part 68 compliance. The User is responsible to ensure that FCC Part 68 compliance is maintained. As an alternative, the CH1799 will operate on a leased line if the line is made wet by application of a DC voltage. Refer to Cermetek Application Note # 114. WARNING Operation of the CH1799LL on a standard PSTN line will damage the CH1799LL and void its warranty. Further, operation of the CH1799LL on a dry line without using proper current limiting circuitry as outlined in Cermetek Application Note # 126 may cause damage to the CH1799LL and will also void its warranty. Table 4. Pin Comparison of CH1786 and HS Modem Family. PIN CH1786 HS Modem Family 1 RING RING 2 TIP TIP 3 RXA T1 4 TXA NC 5 SPK SPK 6 NC NC 7 NC NC 8 SLEEP OPEN* 9 NC NC 10 TXD TXD 11 RXD RXD 12 OPEN* V/D 13 DTR DTR 14 DST DSR 15 RI RI 16 CTS CTS (FX only) 17 DCD DCD 18 HS NC* 19 VCC VCC 20 GND GND 21 RST RST 22 NC RTS NOTES: 1. * Indicates a difference between the CH1786 and the HS Modem. The HS Modem may be directly substituted for the CH1786 except in applications where pins 8, 12, or 18 are used. 2. NC signifies `No Connect.' 3. Effective 31 March 2000, the HS Modem will no longer support the HS indication function. Therefore, pin 18 should be a `No Connect' in all applications. Document No. 607-0003 Revision K3 (09/03) LEASED LINE OPTION The CH1799LL is a leased line version of the CH1799. Whereas the CH1799 requires an active voltage bearing or wet PSTN line for normal operations (typically, 48VDC on-hook line voltage), the CH1799LL is designed to operate over a non-voltage bearing or dry line. The CH1799LL will only operate properly on a dry line. Damage will occur if used on a wet line. The CH1799LL does not support ring detect but does support off-hook control. Refer to Cermetek Application Note # 116 for examples and instructions to establish a connection over a leased dry line wire pair. Note that the length of the leased line is limited to 20,000 feet. Use PSTN line protection as 2003 Cermetek Microelectronics, Inc. Page 7 Cermetek Microelectronics, Inc. High Speed Modem and FAX Family Table 3. PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 NAME RING HS Modem Family Pin Descriptions. FUNCTION I/O I/O I/O I/O O I O I TELCO/TELSET INPUT. Directly connects to the telephone line's RING lead through a user supplied RJ-11C jack. TELCO/TELSET INPUT. Directly connects to the telephone line's TIP lead through a user supplied RJ-11C jack. ANALOG VOICE INJECTED. Input (See Figure 5). 2.2V P-P max. Let float if not used. No connection. SPEAKER. Audio output for speaker. See speaker control diagram. No connection. No connection. No connection. No connection. TRANSMIT DATA. Serial Transmit data input. transmitted when a HIGH is asserted. Marking, or a binary 1 condition, is TIP T1 NC SPK NC NC NC NC TXD RXD NC DTR RECEIVE DATA. Serial Receive data output. Received marking or a binary 1 condition is indicated by a HIGH. No connection. DATA TERMINAL READY. Active LOW. Switching off DTR can either return modem to command state, disconnect phone call, or reset the modem. DTR should be set LOW when not used. DATA SET READY. LOW indicates handshaking with a remote modem is in progress, and/or the data carrier of a remote modem has been detected. RING INDICATION. This signal follows the frequency of the ringing signal and is normally about 20 to 40 Hz for 2 seconds on with 4 seconds off. CLEAR TO SEND. Active LOW. Indicates that the modem is ready to accept data from the DTE. DATA CARRIER DETECT. LOW indicates a data carrier from a remote modem has been detected. This feature must be enabled using the &C1 command. No connection. POWER SUPPLY. 5 Volts 5%. Note: Noise should be less than 25mV peak-to-peak. GROUND. Note: Noise should be less than 25mV peak-to-peak. RESET. Active HIGH. This input must be asserted HIGH for at least 10-msec to reset the modem. RESET is then returned to LOW for normal operation. If no system reset is available, let this pin float to enable the internal reset. 14 15 16 17 18 19 20 21 DSR RI CTS DCD NC VCC GRD RST O O O O I I REQUEST TO SEND. Active LOW. Used for flow control. Should be tied low if not used. RTS NOTE: (1) If VCC has a slow power up ramp time, the internal reset may be ineffective. (2) Do not drive LED's directly from any output. Use Buffers. 22 2003 Cermetek Microelectronics, Inc. Page 8 Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family AT COMMAND APPLICATIONS Dialing a Phone Number. The Dial command takes the form Dn, where n is a string of characters. In the simplest form, n will be only the digits of the phone number to be dialed. Example: Enter: Dial Number. ATD1234567 Example: Enter: Result: Touch-tone dial 9, pause, go off-hook, return for additional AT commands. ATDT9, T; Automatic Answering. S0=0* DO NOT ANSWER TELEPHONE S0=1-254 ANSWER ON RING 1 TO RING 254 S0=255 ANSWER ON RING 255 *When S0 is set to 0, the modem will not auto-answer. In response to this command, the HS Modem dials the telephone number "123-4567" and then waits for a carrier from the distant modem. If no carrier is detected within a given time (the default time is 30 seconds), the HS Modem automatically releases the line and sends a NO CARRIER result code. If a carrier is detected, the HS Modem gives a CONNECT result code and goes on-line, permitting communication with the distant modem. The Dial command may also be issued without a telephone number. ATD causes the modem to pick up the telephone a line without dialing a number. Pause During Dialing. When placing a call from an office with a telephone connected to a PBX, it may be necessary to dial an access code (usually the digit 9) to get an outside line. Inserting a comma in the telephone number commands the modem to pause for a specific length of time. The factory default pause time is 2 seconds. Example: Enter: Result: Dial 9, pause, dial number. ATDT9, T1234567 PHONE LINE CONNECTION GUIDELINES 1. The HS Modem must be mounted in the final assembly such that it is isolated from exposure to any hazardous voltages within the assembly. Adequate separation and restraint of cables and cords must be provided. The circuitry from the HS Modem to the telephone line interface must be provided in wiring that carries no other circuitry other than that specifically allowed in the FCC rules (such as A and A1 leads). Connection to phone line should be made through an RJ-11C jack. PCB traces from the modem's RING and TIP pins to the RJ-11C jack must be 0.1 inch spacing or greater to one another and 0.2 inch spacing or greater to all other traces. The traces should have a nominal width of 0.020 inches or greater. The RING and TIP PCB traces should be as short as possible and oriented to prevent coupling other high speed or high frequency signals present on the host circuit PCB. No additional circuitry other than that shown in Figure 7 may be connected between the modem module and the RJ-11C jack. Doing so will invalidate the FCC approval. The HS Modem, the RJ-11C jack, the interfacing circuitry and all PCB traces in between, must be contained on a PCB with a 94 V-0 flammability rating. The supplied FCC registration label must be applied visibly on the outside of the product. The product's User Manual must provide the user with instructions for connection and use as recommended in the FCC Registration Section below. 2. 3. 4. Multiple commas may be used for a greater delay time. Touch Tone and Pulse Dialing. The modem can use DTMF (touch-tones) T, or dial pulses P when dialing a telephone number. If the dial command does not specify which type to use, the modem defaults to the type last specified. The power-on default value is T. Example: Enter: Result: Pulse dial 9, pause, touch-tone dial number. ATDP9, T1234567 5. 6. 7. Redial Last Number. Use A/, the repeat command, to redial the last telephone number dialed when a busy signal is received. Go Off-Hook and Return to Command State. The modem can be forced to reenter the command state after going off-hook by issuing the ATDT command with a semi-colon. This is useful when using the modem with an independent DTMF tone generator. 8. 9. 2003 Cermetek Microelectronics, Inc. Page 9 Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family CANADIAN APPROVALS The HS Modem family is approvable for use by DOT to CSA CS-03 Part I. However, per Canadian procedures, approval can only be granted after the HS Modem has been installed into the end product. Typically, Canadian approval is obtained by submitting the final end product to an independent test house or consultant for evaluation. The test house/consultant then forwards the test results and applicable documents to the regulatory agency. Cermetek offers a list of consultants to assist with this process. In addition to restriction notification, the FCC requires that Cermetek make all repairs to all products in the HS Modem family. If repairs are necessary after installation of the HS Modem and the end product has been delivered to the end user, the end product must be returned to the end product supplier where the HS Modem can be removed and then forwarded to Cermetek for repair. The following notice is recommended and should be included in the end product's user manual. FOR YOUR USER'S MANUAL PAN-EUROPEAN TBR21 APPROVALS The CH1799TBR/ETBR and CH2056TBR/ETBR products have been designed to meet the requirements of ETSI TBR - 021 Pan-European Approval for Connection to Analogue Public Switched Telephone Networks in addition to the FCC Part 68 conveyed approval, Canadian DOT CSA CS-03 Part I compliance and UL 1950 Edition 3/CSA C22.2 950 recognition. Test reports (as required for CE marking) demonstrating TBR21 compliance are available upon request. The Part 68 rules require the following (or equivalent) be provided to the end user of the equipment containing a DAA: Type of Service. The (insert end product name) is designed to be used on standard device telephone lines. It connects to the telephone line by means of a standard jack called the USOC RJ-11C (or USOC RJ45S). Connection to telephone-company-provided coin service (central office implemented systems) is prohibited. Connection to party lines service is subject to state tariffs. Changes in Attestation Procedure for Plugs and Jacks. (Name of applicant) attests that the network interface plugs or jacks used on this equipment comply with and will continue to comply with the mechanical requirements specified in Part 68, Sub-part F, specifically the dimensions, tolerances and metallic plating requirements. The compliance of these connectors will be assured by purchase specifications and incoming inspection. Documentation of such specifications and/or inspections will be provided by the FCC within 30 days of their request for the same. Telephone Company Procedure. The goal of the telephone company is to provide you with the best service it can. In order to do this, it may occasionally be necessary for them to make changes in their equipment, operations or procedures. If these changes might effect your service or the operation of your equipment, the telephone company will give you notice, in writing, to allow you to make any changes necessary to maintain uninterrupted service. In certain circumstances, it may be necessary for the telephone company to request information from you concerning the equipment which you have connected to your telephone line. Upon request of the telephone company, provide the FCC registration number and the ringer equivalence number (REN); both of these items are listed on the equipment label. The sum of all of the REN's on your telephone lines should be less than five in order to assure proper service from the telephone company. In some cases a sum of five may not be useable on a given line. Consult your telephone provider. Document No. 607-0003 Revision K3 (09/03) HS MODEM HANDLING AND ASSEMBLY RECOMMENDATIONS The HS Modem contains static-sensitive components and should only be handled by personnel and in areas that are properly protected against static discharge. There are two mounting techniques that are recommended for physically connecting the HS Modem to a PCB: 1. Direct soldering. 2. Sockets. Direct Soldering. The HS Modem may be wave soldered onto a circuit card. All HS Modem products are hermetically sealed and will not be harmed by industry standard wave soldering processes. Socketing. The socketing approach to mounting eliminates cleaning and desoldering concerns. When the socket is used, it must make a solid connection to all pins. Failure to do so will cause unreliable or intermittent operation. Also, steps should be taken to assure that the module remains tightly seated in the socket after the end product is shipped. Cermetek recommends socket CES-150-01-T-S by Samtec, 50 pin strip socket. FCC REGISTRATION All products in the HS Modem family are registered with the FCC (except the CH1799LL) under Part 68. To maintain the validity of the registration, you must serve notice to the end user of the product of several restrictions the FCC places on the modem and its use. 2003 Cermetek Microelectronics, Inc. Page 10 Cermetek Microelectronics, Inc. High Speed Modem and FAX Family If Problems Arise. If any of your telephone equipment is not operating properly, you should immediately remove it from you telephone line, as it may cause harm to the telephone network. If the telephone company notes a problem, they may temporarily discontinue service. When practical, they will notify you in advance of this disconnection. If advance notice is not feasible, you will be notified as soon as possible. When you are notified, you will be given the opportunity to connect the problem and informed of your right to file a complaint with the FCC. Contact your local telephone service provider if you have any questions about your phone. Line. In the event repairs are ever needed on the (insert your product name), they should be performed by (insert your company name), or an authorized representative or (insert your company name). For information contact: (insert your company address). DEFAULT SPECS STATUS, PERFORMANCE AND Prior to delivery, Cermetek installs into each HS Modem the following default Configuration Profile: Default Connect Speeds are 14,400bps, 33,600bps and 57,600bps for CH1794, CH1799 and CH2056 respectively Serial port data rate auto baud enabled Bell 212A operation at 1200bps Parity - none Auto answer disabled Command echo ON All result codes enabled - except \REL codes Wait for dial tone before dialing - 2 seconds Dials with touch-tone (T) Detects busy signal (ATX4) Full word result codes - non-extended Pulse dial make/break ratio = 39/61-10pps Test timer set to 0 seconds, test modes disabled Inactivity timer set to 0 minutes CTS always active DSR is ignored DCD is ignored RTS to CTS delay - .01 seconds DTR always active - hang up after transition Long space disconnect disabled Speaker enabled but off when receiving carrier Speaker volume set to low Local modem will not grant RDL request from remote modem Guard tones disabled Minimum DTR pulse width = .05 seconds Ring count - 00 Escape code character = 43 (+) Flash to on hook = 70 msec Auto speed detection enabled DTE connect speed, connect messages Back space character = 08 (BS) Carriage return character = 13 (CR) Line feed Character = 10 (LF) Duration of wait for dial tone =2 seconds Duration of wait for carrier after dialing = 50 seconds Carrier detect response time = 0.6 seconds Escape code guard time = 1 second Length of use after comma = 2.0 seconds Last carrier to hang up delay = 1.4 seconds DTMF interdigit delay = .095 seconds Auto sync address or address detection =0 Connection detected at DTE - Highest speed 38,400kbps Auto retrain enabled - 30 seconds attempts MNP error correction mode can be negotiated (&Q5) MNP - non-extended service selected MNP error correction block size is 128 characters selected Data compression - negotiation enabled Transmit break length is 0.3 seconds All breaks are transmitted in sequence with data Serial port flow control enabled = RTS/CTS XON/XOFF flow control characters selected Note: Upon power-up the HS Modem will recall user profile 0 which may override some of the above Factory Defaults. If desired the user may, at their option, save the factory defaults in user profile 0. Table 5A. Summary of Non-Extended Result Codes. Result Code Form n is ATXn Command Terse Verbose or Long 01234 or Short 0 OK XXXXX 1 CONNECT XXXXX 2 RING XXXXX 3 NO CARRIER XXXXX 4 ERROR XXXXX 5 CONNECT 1200 1XXXX 6 NO DIAL TONE 33XXX 7 BUSY 333XX 8 NO ANSWER XXXXX 9 CONNECT 0600 1XXXX 10 CONNECT 2400 1XXXX 11 CONNECT 4800 1XXXX 12 CONNECT 9600 1XXXX 13 CONNECT 7200 1XXXX 14 CONNECT 12000 1XXXX 15 CONNECT 14400 1XXXX 16 CONNECT 19200 1XXXX 2003 Cermetek Microelectronics, Inc. Page 11 Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family Figure 5. Schematic Illustrating Implementation of Voice Injection Feature. Table 5A. Summary of Non-Extended Result Codes (Continuation). Result Code Form n is ATXn Command Terse Verbose or Long 01234 or Short 17 CONNECT 38400 1XXXX 18 CONNECT 57600 1XXXX 19 CONNECT 115200 1XXXX 20 CONNECT 230400 1XXXX 22 Connect 75TX/1200RX 1XXXX 23 Connect 1200TX/75RX 4444X 24 DELAYED 4444X 32 BLACKLISTED XXXXX 33 FAX XXXXX 35 DATA Table 5B. CH1799 Extended Result Codes. Result Code Form n is ATXn Command Terse Verbose or Long 0123 or Short 40 CARRIER XXXX 44 CARRIER 1200/75 XXXX 45 CARRIER 75/1200 XXXX 46 CARRIER 1200 XXXX 47 CARRIER 2400 XXXX 48 CARRIER 4800 XXXX 49 CARRIER 7200 XXXX 50 CARRIER 9600 XXXX 51 CARRIER 12000 XXXX 52 CARRIER 14400 XXXX 53 CARRIER 16800 XXXX 54 CARRIER 19200 XXXX 55 CARRIER 21600 XXXX 56 CARRIER 24000 XXXX 57 CARRIER 26400 XXXX 58 CARRIER 28800 XXXX 2003 Cermetek Microelectronics, Inc. Table 5B. CH1799 Extended (Continuation). Result Code Form Terse or Short 59 61 62 63 64 66 67 69 76 77 80 84 91 Verbose or Long CARRIER 16800 CARRIER 21600 CARRIER 24000 CARRIER 26400 CARRIER 28800 Compression: Class 5 Compression: V.24bis Compression: None PROTOCOL: NONE PROTOCOL: LAPM PROTOCOL: ALT CONNECT 33600 CONNECT 31200 Result Codes n is ATXn Command 01234 1 1 1 1 1 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 4 X X X X X X X X X X X X X X X X Page 12 IMPORTNAT NOTE This note applies to Tables 5A, 5B, and 5C. An "X" in a column indicates that the message (either the long form if verbose, or the value only for short form) will be generated when that particular value of "n" (shown at the top of the column) has been selected by the use of ATXn. A numeral indicates which less explicit message (verbose or short form) will be output for that X option. Table 5C. CH2056 Extended Result Codes. Result Code Form n is ATXn Command Terse Verbose or Long 0123 or Short 165 CONNECT 32000 XXXX 166 CONNECT 34000 XXXX 167 CONNECT 36000 XXXX 4 X X X Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family Table 5C. CH2056 Extended (Continuation). Result Code Form Terse or Short 168 169 170 171 172 173 174 175 176 177 178 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 Verbose or Long CONNECT 38000 CONNECT 40000 CONNECT 44000 CONNECT 46000 CONNECT 48000 CONNECT 48000 CONNECT 50000 CONNECT 52000 CONNECT 54000 CONNECT 56000 CONNECT 23040 CONNECT 28000 CONNECT 29333 CONNECT 30667 CONNECT 33333 CONNECT 34667 CONNECT 37333 CONNECT 38667 CONNECT 41333 CONNECT 42667 CONNECT 45333 CONNECT 46667 CONNECT 49333 CONNECT 50677 CONNECT 53333 CONNECT 54377 Result Codes n is ATXn Command 01234 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X Table 6A. Summary of Basic AT Commands. Command Function A/ Re-execute command A Go off-hook and attempt to answer call B0 Select V.22 connection at 1200kbps B1 Sect Bell 212A connection at 1200kbps C1 Return OK message Dn Dial modifier P Pulse Dial T Touch Tone Dial W Wait for Dial Tone ; Return to Idle State @ Wait for Quiet Answer Command ! Flash Hook , Pause 0-9/ABC Dial Digits/Characters & wait for credit card dial tone ^ Toggles calling tone L Redial last number * Star digit - tone dialing S=n Dial the number and store in Directory, n= 0 to 3 E0 Turn off command echo E1 Turn on command echo 2003 Cermetek Microelectronics, Inc. Page 13 Table 6A. Summary of Basic AT Commands (Continuation). Command Function H0 Initiate a hang-up sequence H1 If on-hook, go off-hook and enter command mode L0 Set low speaker volume L1 Set low speaker volume L2 Set medium speaker volume L3 Set high speaker volume M0 Turn Speaker off M1 Turn Speaker on during hand shaking and turn speaker off while receiving carrier M2 Turn Speaker on during hand shaking and while receiving carrier M3 Turn Speaker off during dialing and receiving Carrier and turn speaker on during answering N0 Turn off auto-mode detection N1 Turn on auto-mode detection O0 Go on-line O1 Go on-line and initiate a retrain sequence Q0 Allow result codes to DTE Q1 Inhibit result codes to DTE Sn Select S-Register as default Sn? Return the value of S-Register n Sn=v Set default S-Register as default V0 Report short form (terse) result codes V1 Report long form (verbose) result codes W0 Report DTE speed W1 Report line speed, EC protocol and DTE speed W2 Report DCE speed X0 to X4 Report basic call progress result codes, i.e. OK, CONNECT Cermetek Microelectronics, Inc. High Speed Modem and FAX Family Table 6B. Summary of Basic AT Commands. Command Function &F0 Restore Factory configuration 0 &F1 Restore Factory configuration 1 &G0 Disable guard tone &G1 &G2 &K0 &K3 &K4 &K5 &K6 Kn Disable guard tone Enable 1800 Hz guard tone Disable DTE/DCE flow control Enable RTS/CTS DTE/DCE flow control Enable XON/XOFF DTE/DCE flow control Enable transparent XON/XOFF flow control Enable both RTS/CTS & XON/XOFF flow control CONTROLS BREAK HANDLING DURING THREE STATES When modem receives a break from the DTE: \K0, 2, 4 Enter on-line command mode, no break sent to the remote modem \K1 Clear buffer \K3 Send break to remote modem immediately \K5 Send break to remote modem in sequence with tranmitted data When modem receives \b in on-line command state: \K0, 1 Clear buffers & send break to remote modem \K2, 3 Send break to remote modem \K4, 5 Send break to remote modem in sequence with tranmitted data When modem receives a break from remote modem: \K0, 1 Clear data buffers and send break to DTE \K2, 3 Send break immediately to DTE \K4, 5 Send break with received data to DTE \N0 \N1 \N2 \N3 \N4 \N5 \V0 \V1 +MS %C0 %C1 %C2 Select normal speed buffered mode Select direct mode Select reliable mode Select auto reliable mode Force LAPM mode Force MNP mode Connect messages are controlled by the command settings X, W, and S95 Connect messages are displayed in the single line format Select modulation ERROR CORRECTING COMMANDS Disable data compression Enable MNP 5 data compression Enable V.42bis data compression Page 14 Function Enable both V.42bis and MNP 5 compression \A0 Set maximum block size in MNP to 64 \A1 Set maximum block size in MNP to 128 \A2 Set maximum block size in MNP to 192 \A3 Set maximum block size in MNP to 256 \Bn Send break of n x 100 msec &M0 Select direct asynchronous mode &P0 Set 10pps pulse dial with 39%/61% make/break &p1 Set 10pps pulse dial with 33%/67% make/break &P2 Set 20pps pulse dial with 39%/61% make/break &P3 Set 20pps pulse dial with 33%/67% make/break &Q0 Select direct asynchronous mode &Q5 Modem negotiates an error corrected link &Q6 Select asynchronous operation in normal mode &V Display current configuration &W0 Store the active profile in NVRAM profile 0 &W1 Store the active profile in NVRAM profile 1 &Y0 Recall stored profile 0 upon power up &Y1 Recall stored profile 1 upon power up &Zn=x Store dial string x (to 31) to location n (0-3) %E0 Disable line quality monitor and auto retrain %E1 Enable line quality monitor and auto retrain %E2 Enable line quality monitor and fallback MNP10 COMMANDS -K0 Disable MNP 10 extended services -K1 Disable MNP 10 extended services -K2 Disable MNP 10 extended services FAX CLASS 1 +FCLASS=n Service Class +FAE=n Data/fax auto answer +FRH=n Receive data with HDLC framing +FRM=n Receive data +FRS=n Receive silence +FTH=n Transmit data with HDLC framing +FTM=n Transmit data +FTS=n Stop transmission and wait Command %C3 2003 Cermetek Microelectronics, Inc. Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family Register S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S21 S22 S23 S24 S25 S26 S27 S28 S30 S31 S32 S33 S34-S35 S36 S37 S38 S39 S40 S41 S42-S45 S46 S48 S82 S86 S95 Table 7. S-Register Summary. Function Range Rings to Auto-Answer 0-255 Ring Counter 0-255 Escape Character 0-255 Carriage Return Character 0-127 Line Feed Character 0-127 Backspace Character 0-255 Wait Time for Dial Tone 2-255 Wait Time for Carrier 1-255 Pause Time for Dial Delay Modifier 0-255 Carrier Detect Response Time 1-255 Carrier Loss Disconnect Time 1-255 DTMF Tone Duration 50-255 Escape Prompt Delay 0-255 Reserved --General Bit Mapped Options Status --Reserved --Test Mode Bit Mapped Option Status (&T) --Reserved --Test Timer 0-255 V.24/General Bit Mapped Options Status --Speaker/Results Bit Mapped Options Status --General Bit Mapped Options Status --Reserved --Delay to DTR Off 0-255 RTS-to-CTS Delay 0-255 General Bit Mapped Options Status --General Bit Mapped Options Status --Disconnect Inactivity Timer 0-255 General Bit Mapped Options Status --XON Character 0-255 XOFF Character 0-255 Reserved --LAPM Failure control --Line Connection Speed --Delay before Forced Hang up 0-255 Flow Control bit Mapped Options Status --General Bit Mapped Options Status --General Bit Mapped Options Status --Reserved --Data Compression Control --V.42 Negotiation Control --LAPM Break Control --Call Failure Reason Code 0-255 Result Code Messages Control --Page 15 Units Rings Rings ASCII ASCII ASCII ASCII Seconds Seconds Seconds 0.1 seconds 0.1 seconds 0.001 seconds 0.02 seconds ----------Seconds --------Sec or 0.01 sec 0.01 seconds ----10 seconds --ASCII ASCII ------Seconds ------------------- Saved * * * * * * * ----------* --------* ------------- * * * * * * * * Default 0 0 43 13 10 8 2 50 2 6 14 95 50 --138 (8Ah) --0 --0 52 (34h) 117 (75h) 62 (3Dh) --5 1 73 (49h) 0 0 94 (C2h) 17 (11h) 19 (13h) --7 0 20 3 104 (68h) 195 (C3h) --138 7 128 (40h) --0 2003 Cermetek Microelectronics, Inc. Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family Figure 6. PSTN Line Interface for all HS Modems. 1. Currently Limiting PSTN Protection Line Device. Currently limiting devices are mandatory to meet UL safety standards. To maintain conveyed FCC Part 68 approval, the current limiting components identified as F1 and F2 in dashed Box #1 must also survive FCC Part 68 surge testing. Refer to Cermetek Application Note #126, Supplemental PSTN Line Protection, for more details. Refer to Application Note # 130, Summary of Recommend Suppliers, for a list of suppliers and associated part numbers. A. A Polyfuse (rated at 0.15 amps) is preferred because it resets automatically upon removal of the current flow. Non-resettable devices are also acceptable. Refer to Application Note #130 for a complete list of recommended vendors and associated part numbers. B. Resistors (10 carbon film or 1/8 watt minimum) may be used in Canada, as Canada has no requirements that PSTN equipment be operational after a Type B surge test. C. Although CSA CS-03 Part 1 (Canada) follows the requirements of FCC Part 68 (USA), Cermetek recommends contacting DOT (Canada) and/or a certified independent lab to verify compliance. For Canada, use either 10 resistors (carbon film or SMD parts 1/8 watt minimum) as described in paragraph B above. 2. Over Voltage and Lightning Protection. A. Surge Protection is provided by internal circuitry contained within all HS Modems except the CH1799LL (see Figure 6). No additional external components are required to maintain conveyed FCC Part 68 approval for all HS Modems (excluding the CH1799LL). B. For CH1799LL, the required surge protection (identified as D1 in dashed Box 2) must be 2003 Cermetek Microelectronics, Inc. Page 16 supplied externally. The purchaser must include some form of surge protection as described herein to maintain conveyed FCC Part 68 approval. Refer to Application Note # 130 for a list of recommended suppliers. C. In most environments, 2 terminal surge suppressors (300V sidactor or equivalent) are adequate. For severe environments, use an external 3 terminal device with an earth ground. DO NOT USE MOUs or transorbs this purpose. 3. EMI/RFI Suppression. No external EMI/RFI noise suppression circuitry is required to maintain conveyed FCC Part 68 approval. However, additional suppression, if required for other reasons, may be added as described below in Sections 3A-3B without adversely affecting FCC Part 68 approval. A. To provide adequate EMI/RFI suppression, the capacitor/inductor network contained in dashed Box #3 should be located as close to the RJ11 Jack as possible. Further, this network should be provided with an excellent ground path to the chassis. B. Capacitors C1 and C2 should not exceed 0.005f. They must have a rating of 1.5KV and typically are 0.001f 20%. Inductors L1 and L2 may be either individual inductors or a dual inductor. Refer to Application Note #130 for a complete list of recommended vendors and associated part numbers. For UL applications, choose capacitors and inductors that are UL 1950 listed. The actual values of the components used may vary depending on the end product design. Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family Table 8. HS Modem Electrical Specifications. Symbol VCC ICC Off Hook (CH1794) ICC Off Hook (CH1799) VIH VIL VT+ VTVOH VOL IIN IOH Cp Characteristic Positive Supply Voltage Nominal Operating Current @ VCC = 5.5V when modem is Off Hook Nominal Operating Current @ VCC = 5.5V when modem is Off Hook High Level Input Voltage* Low Level Input Voltage* Positive Hysteresis Threshold for RESET Pin Negative Hysteresis Threshold for RESET Pin High Level Output (IOH = 0.5 mA)* Low Level Output (IOL = 1.6 mA)* Input Leakage Current (TXD, DTR, RTS) Input Current (RST) Capacitive Load (TXD, DTR, RTS) Capacitive Load (RST) Test conditions: VCC = 5V 10%, Temp = 0C to 70F (unless otherwise stated). *Output Load = 50 pF one TTL. Table 9. HS Modem Electrical Specifications. Parameter Off Hook Impedance Trans Hybrid Loss Ring Voltage Loop Line Loop Current - (Off Hook) Return loss @ 1000 Hz Ring Frequencies Receiver Insertion Gain Transmit Power First Character After Reset Inter Character Delay Command Delay Minimum Reset Pulse Duration 1.0 20 100 10 50 200 -0.5 110V 20 15 40 0.0 -9.5 +0.5 Min. 20 25 250V 100 Typ. Max. Units Ohm dB VPP mA dB Hz dB dBm sec msec msec msec 600 Ohm - Data Mode Delay Between all command characters Between all AT command characters* If user supplied 600 Ohm, RXA, TXA On 48VDC line voltage for sustained periods Does not apply to CH1799LL 600 Ohm Comments 2.4 0.6 100 500 10 8 2.5 0.5 2.0 0.8 Min. 4.5 Typ. 5.0 115.0 185.0 Max. 5.5 Units V mA mA V V V V V V A A pF pF * Note: Must wait for modem response before issuing new command. 2003 Cermetek Microelectronics, Inc. Page 17 Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family Name SPK Type O(DF) Table 10. Analog Characteristics. Characteristic Minimum Load Maximum Capacitive Load Output Impedance Output Voltage D.C. Offset Value 300 Ohms 0.01f 10 Ohms 2.5 1.6V <20mV Model CH1794 CH1794ET Table 11. Summary HS Modem Family of Products. Summary of Features Operating Temperature Full Function, 14.4kbps, FCC Part 68 Approved, UL 1950 0C to + 70C Listed Full Function, 14.4kbps, FCC Part 68 Approved, UL 1950 -40C to +85C Listed Full Function, 33.6kbps, FCC Part 68 Approved, UL 1950 Listed Full Function, 33.6kbps, FCC Part 68 Approved, UL 1950 Listed Full Function, 33.6kbps, FCC Part 68 Approved, UL 1950 Listed Full Function, 33.6kbps, FCC Part 68 Approved, UL 1950 Listed, TBR21 Compliant Full Function, 33.6kbps, FCC Part 68 Approved, UL 1950 Listed, TBR21 Compliant Full Function, 56.0kbps, FCC Part 68 Approved, UL 1950 Listed Full Function, 56.0kbps, FCC Part 68 Approved, UL 1950 Listed Full Function, 56.0kbps, FCC Part 68 Approved, UL 1950 Listed, TBR21 Compliant Full Function, 56.0kbps, FCC Part 68 Approved, UL 1950 Listed, TBR21 Compliant 0C to + 70C -40C to +85C 0C to + 70C 0C to + 70C CH1799 CH1799ET CH1799LL CH1799TBR CH1799ETBR -40C to +85C CH2056 CH2056ET CH2056TBR 0C to + 70C -40C to +85C 0C to + 70C CH2056ETBR -40C to +85C 2003 Cermetek Microelectronics, Inc. Page 18 Document No. 607-0003 Revision K3 (09/03) Cermetek Microelectronics, Inc. High Speed Modem and FAX Family NOTES: 1. All dimensions are inches. 2. Case dimensions are nominal + 0.02 inches. 3. Pin length is nominal + 0.03 inches. 4. Cermetek recommends that 0.04 inch diameter plated through holes are used with 0.060 inch diameter pads. 5. Pin spacing are nominal. 6. Low Profile (0.550 inches maximum) case available 8/1/01 upon special request. Cermetek reserves the right to make changes in specifications at any time and without notice. The information furnished by Cermetek in this publication is believed to be accurate and reliable. However, Cermetek assumes no responsibility for its use, or for any infringements of patents or other rights of third parties resulting from its use. No license is granted under any patents or patent rights of Cermetek. Printed in U.S.A 406 TASMAN DRIVE | SUNNYVALE CA 94089 | LOCAL: 408-752-5000 | TOLL FREE: 1-800-882-6271 | FAX: 408-752-5004 CERMETEK WEB SITE: http://www.cermetek.com | EMAIL: sales@cermetek.com iModem Network WEB SITE: http://www.imodem.net/ or https://sunnyvale.imodem.net/ 2003 Cermetek Microelectronics, Inc. Page 19 Document No. 607-0003 Revision K3 (09/03) |
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