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Reply To: Abis structure question

#49618
Keith
Guest

Pix, Many Thanks, that helps a lot.

I also notice the A-bis protocol includes cyphering commands to protect the air interface. Is the cyphering done on the BSC or the BTS nodes? That is , is the speech within the TRAU frames in clear channels on the A-bis interface and then cyphered/decyphered on the BTS?