D-Link DMI-128ESU Manuel D’Utilisation

D-LINK ISDN TA DMI-128ESU+

9.3 Type “AT’, but the TA does not respond with “OK’ message

Is the “POWER” LED lit?

Turn on the power to the
TA

Yes

Does the attention code
contain both upper and lower
case letters? (i.e. aT or At?)

Use only one case in
attention code.

Yes

Is COM Port Setting
correct?

Retrieve and review COM
Port setting.

“Tx/Rx” LED does not flash
when entering command
from terminal (DTE)

Check the connection between
TA and DTE.
1. Check the socket connections.
2. Use the connection cord

provided with the TA.

3. Make sure the cord is in good

condition.

4. Make sure the Ta is

connected to the correct COM
Port on the PC.

Is the “DTR” LED lit?

Enter AT command of
“AT&D0”

Does the “Tx/Rx” LED
flash when enter
“AT<CR>” ?

Reconfirm COM Port.

Yes