Multi-Tech MT5634ZPX, Руководство пользователя

Страница: 69 / 108

MT5634ZPX
69
4 Troubleshooting
• The modem may be defective. If you have another
MultiModemZPX, try swapping modems. If the problem goes
away, the first modem possibly is defective. Call Technical
Support for assistance (see Chapter 7).
The Modem Dials But Cannot Make a
Connection
Several reasons why the MultiModemZPX fails to make a
connection include
• Lack of a physical connection to the telephone line.
• A wrong dial tone.
• A busy signal.
• A wrong number.
• No modem at the other end.
• A faulty modem, computer, or software at the other end.
• Incompatibility between modems.
You can narrow the list of possibilities by using extended result
codes. If you have disabled the modem’s extended result codes,
re-enable them by entering ATV1X4 in the terminal window and
pressing ENTER. When you dial again, the modem reports the
call’s progress.
• If the modem reports
NO DIALTONE, check that the
modem’s telephone line cable is connected to both the
modem’s LINE jack (not the PHONE jack) and the telephone
wall jack. If the cable looks secure, try replacing it.
If that doesn’t work, the problem may be in your building’s
telephone installation. To test the building installation, plug a
telephone into your modem’s telephone wall jack and listen
for a dial tone. If you hear a dial tone, your modem may be
installed behind a company phone system (PBX) with an
internal dial tone that sounds different from the normal dial
tone. In that case, the modem may not recognize the dial
tone and may treat it as an error. Check your PBX manual to
see if you can change the internal dial tone. If you can’t,