Type "At', But The Ta Does Not Respond With "Ok' Message - D-Link DMI-128ESU+ User Manual

9.3 Type "AT', but the TA does not respond with "OK' message

Is the "POWER" LED lit?
Does the attention code
contain both upper and lower
case letters? (i.e. aT or At?)
Is COM Port Setting
correct?
"Tx/Rx" LED does not flash
when entering command
from terminal (DTE)
Is the "DTR" LED lit?
Does the "Tx/Rx" LED
flash when enter
"AT<CR>" ?
D-LINK ISDN TA DMI-128ESU+
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
Yes
Turn on the power to the
TA
Use only one case in
attention code.
Retrieve and review COM
Port setting.
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.
Enter AT command of
"AT&D0"
Reconfirm COM Port.
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