User manual SIMPLETECH 61600-00005-003

[. . . ] Communicator V. 34 Data/Fax Modem Plug n' Play PC Card Reference Guide (Document Part Number 61600-00005-003) Outline of Guide By Chapter 1. Using AT Commands Some Notes About AT Commands Configuring the Modem Sample Configuration Sample Configuration Sample Configuration AT Commands AT& Commands AT% Commands AT\ Commands AT) Commands AT* Commands AT: Commands AT- Commands AT+ Commands 2. S-Registers Example: Writing to an S-Register Bit-Mapped Options S-Registers Example: Setting an S-Register Example: Interpreting an S-Register Alphanumeric List of S-Registers 1. Using AT Commands Communications programs control your modem by issuing modem instructions called AT commands. [. . . ] Based on this value, retrain or fallback/fall forward may be initiated if enabled by the %E1 or %E2 commands. The command reports an ERROR if the modem is not connected, or is connected at 300bps, V. 23, or fax modes. In V. 34, the symbol rate, SNR, THD, TX level and pre-emphasis are also reported. %L %Q AT\ Commands \An Maximum MNP Block Size Setting. This sets the maximum allowable MNP block size. Block size is negotiated during the MNP handshaking. In general, the better the line quality, the larger the blocks. In reliable mode, the modem will signal a BREAK through the active error correction protocol. In non-error correction mode, the modem will transmit a BREAK signal to the remote modem that is a length n times 100 ms, where n is between 1 and 9 (the default for n is 3). When the modem receives a break from the remote modem, the break is passed as follows: 1) For non-corrected modes, the break length is passed; 2) For error-corrected modes a 300mS break is passed. (See \Kn. ) Modem-to-Modem Software Flow Control Setting. This command enables or disables software flow control between the local and remote modem. During a reliable connection, this setting is ignored. (See S41. ) \G0 Disable modem-to-modem software flow control. \G1 Enable modem-to-modem software flow control. This command allows you to send a BREAK to stop data transfer without disconnecting. (See S40. ) The resulting behavior depends on the state of the modem: 1. Modem receives a BREAK from the computer while operating in data mode. \K1 Modem clears data buffers and sends BREAK to remote modem. \Bn \Gn \Kn \K2 Same as \K0. \K3 Sends BREAK to remote modem immediately. \K5 Sends break in sequence with transmitted data. Modem receives a BREAK from the computer while operating in command mode. (See \B. ) \K0 Clears data buffers and sends BREAK to remote modem. [. . . ] 128 Enable fallback from MNP 10 to V. 22bis/V. 22 ( Q 1). Range: 136 or 138 Default: 138 In Profile: Yes Writeable: Yes 136 Disable compression. 138 Enable compression. - S46 S48 V. 42 Error Correction Negotiation. Range: 0, 7, 128 Default: 7 In Profile: Yes Writeable: Yes 0 Disable negotiation and proceed with LAPM. [. . . ]