AT&T DataPort PCX Modem Betriebsanweisung PDF herunterladen (Seite 31)

Troubleshooting

6-3

Issue 3 October 1995

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

(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.

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AT&T DataPort PCX Modem Betriebsanweisung Seite 31