The Modem Disconnects While Online - Multitech MultiModem MT5600ZDX User Manual

5 Troubleshooting
installation, plug a phone into your modem's phone wall jack and listen for a dial
tone. If you hear a dial tone, your modem might be installed behind a corporate
phone system (PBX) with an internal dial tone that sounds different from the
normal dial tone. In that case, the modem might not recognize the dial tone and
might 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 (note,
however, that X3 is not allowed in some countries, such as France and Spain).
If the modem reports BUSY, the other number might be busy, in which case you
should try again later, or it might 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.
To change the dial prefix in Windows 95 HyperTerminal, select Connect from
the Call menu, click Dialing Properties, and type 9 in the local and long distance
boxes in How I dial from this location.
If the modem reports NO ANSWER, the other system has failed to go off-hook, or
you might have dialed a wrong number. Check the number.
If the modem reports NO CARRIER, the phone was answered at the other end,
but no connection was made. You might have dialed a wrong number, and a
person answered instead of a computer, or you might have dialed the correct
number but the other computer or software was turned off or faulty. Check the
number and try again, or try calling another system to make sure your modem is
working. Also, try calling the number on your telephone. If you hear harsh
sounds, then another modem is answering the call, and the modems might be
having problems negotiating because of modem incompatibilities or line noise.
Try connecting at a lower speed.

The Modem Disconnects While Online

If you have Call Waiting on the same phone line as your modem, it can interrupt
your connection when someone tries to call you. If you have Call Waiting,
disable it before each call. In most phone areas in North America, you can disable
Call Waiting by preceding the phone number with *70 (check with your local
phone company).
You can automatically disable Call Waiting by including the disabling code in
the modem's dial prefix (e.g., ATDT*70,—note the comma, which inserts a pause
before the number is dialed). To change the dial prefix in Windows Terminal,
select Settings | Modem Commands. To change it in HyperTerminal, select
Connect from the Call menu, click Dialing Properties, check This location has
Call Waiting, and select the correct code for your phone service.
If you have extension phones on the same line as your modem, you or someone
else can interrupt the connection by picking up another phone. If this is a
frequent problem, disconnect the extension phones before using the modem, or
install another phone line especially for the modem.
24