Hello,

I am new to this Community and hope that you can help me to solve my problem with the TDA200 : )
I used the search function and read almost every thread about the tda200 and I have not seen any problem like mine.

Setup:
TDA-200
Model No.: PSLP1207
Around 50 telephones (e.g. KX-T7665)
Line: ISDN

Problem:
Incoming calls from certain numbers are manipulated.
E.g.: We receive a call from the number 0751 #####, the display of our office phones show 07751 #####. So somewhere a digit is added making it impossible to use the recall function.
Since a few days the same thing happens with calls from other numbers. 0407 gets changed to 04407.

I could not understand where this is coming from. I checked the Caller ID Modification, but then read that it would not matter, since we are using ISDN. The CLIP modification does not seem to be misconfigured as well.
I used the "ISDN Protocol Trace" and logged an incoming call from the above mentioned number. In the log the number was 751 #####, the display still showed 07751 #####.

I am stuck right here and have no clue where to look.
Any help leading towards a solution is appreciated.

Thank you very much.


Greetings
Mark


(Sorry for any mistakes or unclear phrasing. English is not my main language.)