Caller ID as Unknown

asdrhyme

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It will be really great if some one can help me.

I purchased Fritzbox 7170 which was in German language and I converted it to English and even changed it to annex A. I am using it Inda with airtell DSl and everything works as it should with only one problem.

For all calls on Fixed Line I get caller id as Unknown. And even in fritzbox log it show as

03.10.11 12:45 unknown Telephone Fixed Line 0:01

For all SIP accounts, caller id works fine.

Below is some information for my Fritzbox

FRITZ!Box Fon WLAN 7170 Firmware version 29.04.82

if you require any other information please let me know.