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Reply To: CM Service Abort

#56256
Pix
Guest

FR,

ATTO method is good: when exactly the Abort is sent? There are plenty of DTAP msg after the CM Service Req (Ciphering, Call Setup, Identity, …)

ATTO,

Have you tried deactivating the ciphering for a while? Which cipher are you using? A5/3 perhaps?

In the cipher mode cmd, the MSC sends a list of possible codecs, and it’s up to the BTS to choose one (depends on BTS capbilities and MS capabilities, received in a previous radio msg)

Regards,
pix