Dial Problems - AT&T DataPort PCX Modem User Manual

Troubleshooting
S: Make sure that your communications software has a valid
character format. Valid formats consists of 8 data bits with
no parity, or 7 data bits with even, odd, mark or space
parity.
S: Make sure that your software is set to a valid DTE rate. The
DataPort PCX supports DTE data rates from 57,600 bps to
300 bps. Your software may refer to this as the Baud Rate.
S: Make sure that your communications software is offline and
in Terminal mode.

Dial Problems

P: The message NO DIALTONE appears after dialing a
telephone number.
S: Make sure that the telephone cord is connected to the
modem and wall outlet. Dial the telephone number again.
S: Attach a telephone directly to the wall outlet and verify that
a dial tone exists. If one does not, contact your local
telephone company.
S: Use the ATM1 or ATM2 command to turn the speaker ON
and listen for a dial tone when you issue an ATD n (Dial)
command. If no dial tone is heard, you may have a bad
telephone cord.
S: Disable the Dial Tone Detect command (X0, X1, and X3)
before dialing. This forces the modem to dial without
detecting a dial tone on the telephone line. This type of
dialing is known as Blind Dialing.
P: The message NO CARRIER appears after dialing a
telephone number.
S: Make sure you dialed a correct and valid telephone number,
and that a modem is connected to the other side.
S: Try dialing a number known to be valid, such as the AT&T
Paradyne BBS.
S: Make sure that no additional characters are sent to the
modem during the connection process. The modem
automatically aborts the call if it receives any.
Issue 2 July 1995
6-3