DCB SM-56 Manuel de dépannage

Parcourez en ligne ou téléchargez le pdf Manuel de dépannage pour {nom_de_la_catégorie} DCB SM-56. DCB SM-56 1 pages. Security dial-up modem

Application Troubleshooting Guide

A step-by-step configuration to implement an encrypted dial-up connection using two

SM-56 units is shown starting on page 6 of the manual. The following are points at which

problems may occur.

1. If your attached device does not provide a DTR signal, you need to issue the

command AT&D0 after the ATS0=1 on the answering modem.

2. Both modems need the same key. If you use the auto-generated random key, then

you should only generate the key on one modem and write down that key to enter

it in the other modem. Auto-generating random keys on both modems will result

in both modems having different keys and won't work.

3. The commands entered after the AT+K command in the answer configuration of

the sample are entered blindly. That is, after the AT+K command, you only see

"OK" after entering the remainder of commands (from AT+E1 to AT&Y0 on the

list).

4. If the device connected to the answer modem is streaming data, the call will be

aborted. This is characteristic of all dial-up modems.

5. If the device connected to the answer modem echoes data the modem will not

answer. To correct this, issue the command ATQ1&W to the answer modem. This

will quiet the modem result codes so that there is no data to echo. You will not see

an "OK" after you issue this command.

6. The modem DTE speed is set by dip switches. Insure that you have that speed

match your devices. See p. 11 of the manual. The default setting is 57,600.

7. If the modems connect but you are still having problems, suspect wiring issues.

See p. 10 of the manual for the modem's interface description.

The SM-56 modem is shipped with several wiring adapters and a straight through line

cord. Combining the DIRECT PC and REMOTE PC adapters with the line cord between

them provides a null modem cable to connect directly to a PC for initial configuration.

Combining the DIRECT PC and REMOTE PC 25 adapters with the line cord between

them provides a cable to make the modem appear as a standard 25 pin modem DCE

interface.

SM-56 Security Dial-Up Modem

DCB, Inc.

2949 CR 1000 E

Dewey, Illinois

61840

217.897.6600 Tel

800.432.2638 Toll Free

217.897.1331 Fax