Multi-Tech Systems MT3334ZDX - Manual (Page 22)

MT3334ZDX/V Owner's Manual
22
The Modem Dials But Cannot Make Connection
There can be several reasons the MultiModemZDX fails to make a
connection. Possibilities 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. To
enable them, enter ATV1X4 and press ENTER while in terminal mode, or
include V1X4 in the modem’s initialization string. When you dial again, the
modem will report 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, change your modem’s initialization string to replace X4 with X3,
which will cause the modem to ignore dial tones.
• If the modem reports BUSY, the other number may be busy, in which
case you should try again later, or it may indicate that you have failed
to add a 9, prefix to the phone number if you must dial 9 for an outside
line.
If you must dial 9 to get an outside line, the easiest way to dial it
automatically is to include it in the modem’s dial prefix, e.g., ATDT9,.
Note the comma, which inserts a pause before the number is dialed.
By inserting 9, into the dial prefix, you do not have to include it in each
directory entry.