Panasonic IP Phone registration fails

[techbrain1]

Hello,
Please I have been trying to register Panasonic kx-nt553 ip phone to Panasonic ncp500 but the phones does not register.
The PBX has DSP card installed and I have followed documents to get it registered but failed.
I am beginning to suspect that the DSP card is fault but how can I find out if DSP card is faulty.

Thank you.

 

[Mike_K]

See attached a file.