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the different Attention strings available in the Templates on the Direct Modem Connection form. Force the modem to transmit with a maximum link speed of 2400 baud. Some modems accept a command that limits the maximum speed the modem will converse in (V.34 modems sometimes use AT&N3). Some V.90 modems allow you to force the modem into the Bell V.22, 2400 baud mode (try AT+MS=V22B,0,2400). Modem 'Hangs' after Call If the call is successful but the modem is 'stuck' after calling the NIST, try turning off DTR. Sometimes DTR will cause the modem to hang-up prematurely not allowing the port to reset. Troubleshooting Modem Communications The direct terminal screen allows you to communicate with a modem by sending it commands and wait for replies. The terminal allows you to manually walk through the connection sequence of connecting to the NIST via modem. Won't Open Port Message The com port selected is not the one used by the modem. To find the com port used by modems installed on your computer, open the Modem applet in the Windows Control Panel. Press the "Diagnostics" tab to see a listing of the com port/modem assignments. Modem Won't Reply to String Try changing the string you are sending or modify the handshaking used with the modem. |