MODEM debugging small common sense MR modem Ready / Test (flashlight, self-test, or diagnostic) Triendal Ready (RS-232 DTR signal given time Light) SD Send Data RD Receive Data OH From the modem picking unit ( Connection line dial-up) Light, modem hangs after the Light off CD carrier detection, the local modem receives the active data carrier signal from the remote modem when the AA automatic answer, when the modem setting is on the automatic response, detection from the distance Call, flashing HS high speed during ringing, when the modem is on high-speed work - other: VO voice, connection modem's telephone pick-out, the phone is launched the Ri ring display, when the modem detects from afar Call, flicker DUMP mode during ringing: If you set the modem to "dumb" mode, you cannot identify the command, and you cannot enter-command status -at command: - (1) initiating call D command d Contains a variety of dial modes: T audio dial P pulse dial W Wait for dial tone, delay processing Next character s = N Dial-Dial-(2) Recognizing call to implement automatic response, first To assign a non-zero value (ATS0 = N, N = 1-255), n means that the modem picking automatically answers a call before the call detected the number of rings and S0 default 0 (S0 = 0) is turned off. Automatic response. In the automatic response status, the modem has returned the Ring result code each time, but does not answer the call until you send a command (manual answer) - (3) AT & F Restore Factory Configuration AT & W Write Configuration AT & Zn = x "X" is stored in the "N" address (n = 0-3) - (4) Tell the command & T pulse dial & W Write to write & CN Leecry carrier signals have always exist, use the Call Back to use & AN decisions Tangle or response mode establishing a join, use the Call Back to use the & ln Select Dial Mode or Dunition - (5) Result Description OK Command The CONNECT join created RING detection ringing signal NO Carrier no detected or lost carrier signal
