CH1794 Cermetek Microelectronics, CH1794 Datasheet
CH1794
Specifications of CH1794
Related parts for CH1794
CH1794 Summary of contents
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... 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 ...
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... High Speed Modem and FAX Family Correcting scheme supports Bell 103 ITU-T V.22 Bell212A ITU-T V.22bis ITU-T V.32 ITU-T V.32bis ITU-T V.34 ITU-T V.34bis ITU-T V.90 The CH1794 uses data compression techniques 57.6kbps/115.2kbps/230.4kbps, IMPORTANT NOTE V.90 standard prescribes Document No. 607-0003 Revision K6 (08/04) The test and The ...
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... The user should apply his own pull-up resistor to an active 5V source when the HS 2004 Cermetek Microelectronics, Inc. Modem is powered down. The internal blocking diode provides supply isolation. The pins of the HS Modem will undefined state when powered is switched off ...
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... Cermetek Microelectronics, Inc. CH1794 300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 19200, 38400, and 57600bps. CH1799 300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24000, 26400, 28800, 38400, 57600, and 115200bps. CH2056 300, 600, 1200, 2400, 4800, 7200, ...
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... RST EXTERNAL RESET Figure 4. HS Modem Family Application Diagram. 2004 Cermetek Microelectronics, Inc. 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 ” ...
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... On power up, or when reset is initiated either by the ATZ<CR> command or by the RST pin, the modem will reconfigure to its default state with the line carrier modulation speed set to: 1. 14.4kbps for the CH1794 2. 33.6kbps for the CH1799 3. 57.6kbps for the CH2056 If desired, any speed, error correction, or data ...
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... 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 ...
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... 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. 2004 Cermetek Microelectronics, Inc. HS Modem Family Pin Descriptions. FUNCTION Serial Transmit data input. Marking binary 1 condition, is ...
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... 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. 2004 Cermetek Microelectronics, Inc. Example: Enter: Result: Automatic Answering. S0=0* ...
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... 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. 2004 Cermetek Microelectronics, Inc. In addition to restriction notification, the FCC requires that Cermetek make all repairs to all products in the HS Modem family ...
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... SPECS 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 ...
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... Cermetek Microelectronics, Inc. Result Table 5B. CH1799 (Continuation ATXn Command Terse or Short ...
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... Toggles calling tone L Redial last number *,# Star digit – tone dialing S=n Dial the number and store in Directory Enable command echo E1 Disable command echo 2004 Cermetek Microelectronics, Inc. Result Codes Table 6A. Summary (Continuation ATXn Command Command ...
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... DSR active after answer tone detected and inactive after loss of carrier &Q0 Select direct asynchronous mode &Q5 Modem negotiates an error corrected link 2004 Cermetek Microelectronics, Inc. High Speed Modem and FAX Family Command &Q6 Select asynchronous normal mode &V Display current configuration & ...
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... Factory Default values that are different from the Firmware Default values are highlighted in BOLD. 4. Restore Factory Default values using Zn command. 5. Restore Firmware Default values using &Fn command. 2004 Cermetek Microelectronics, Inc. Table 7. S-Register Summary. Range Units 0-255 ...
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... FCC Part 68 approval for all HS modems (excluding the CH1799ALL). For CH1799ALL, the required surge protection (identified dashed Box 2) must be supplied externally. The purchaser must include 2004 Cermetek Microelectronics, Inc. Protection Line some form of surge protection as described herein to maintain conveyed FCC Part 68 approval. ...
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... First Character After Reset Inter Character Delay Command Delay 100 Minimum Reset Pulse Duration * Note: Must wait for modem response before issuing new command. 2004 Cermetek Microelectronics, Inc. Table 8. HS Modem Electrical Specifications. Characteristic = 0.5 mA 1.6 mA)* OL Table 9. HS Modem Electrical Specifications. ...
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... SPK O(DF) Table 11. Summary HS Modem Family of Products. Model CH1794 Full Function, 14.4kbps, FCC Part 68 Approved, UL 1950 Listed CH1794ET Full Function, 14.4kbps, FCC Part 68 Approved, UL 1950 Listed CH1799 Full Function, 33.6kbps, FCC Part 68 Approved, UL 1950 Listed CH1799ET Full Function, 33.6kbps, FCC Part 68 Approved, UL 1950 ...
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... Therefore, for FCC Approved or Approvable devices, the user assumes all risk for maintaining compliance to registration. 406 TASMAN DRIVE | SUNNYVALE CA 94089 CERMETEK WEB SITE: http://www.cermetek.com iModem Network WEB SITE: http://www.imodem.net/ 2004 Cermetek Microelectronics, Inc. Table 12. HS Modem Family Pin Functions. PACKAGE CONNECTION TABLE FUNCTION PIN NO. RING TIP ...