29
User Guide
the problem may be in your buildings telephone installation. To test the building
installation, plug a telephone into your modems 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 cant, change your modems initialization string to replace
X4 with X3, which will cause the modem to ignore dial tones.
4If 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 modems 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 your communications package, select Setup, Modem;
then select the modem type you are using, and type the new prefix in the Dial
Prefix box. To change the dial prefix in Windows Terminal, select Settings, Modem
Commands.
To change it in Windows 95 HyperTerminal, select Call, Connect from the menu
bar, click Dialing Properties, and type 9 in the local and long distance boxes in How
I Dial from This Location.
4If 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.
4If 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 may be having problems
negotiating because of modem incompatibilities or line noise. Try connecting at
a lower speed.
The Modem Disconnects While Online4If you have call waiting on the same phone line as your modem, it may interrupt
your connection when someone tries to call you. If you have call waiting, disable
it before each call. In most telephone areas, you can disable call waiting by
preceding the telephone number with *70 (check with your local telephone
company).
You can automatically disable call waiting by including the disabling code in the
modems dial prefix (e.g., ATDT*70,note the comma, which inserts a pause
before the number is dialed). To change the dial prefix in your communications
package, select Setup, Modem; then select the modem type you are using, and type