My cucm has a SIP trunk to Audiocodes in another city. The Audiocodes connect to PBX via FXO port. There is a ip phone configured with call forward no answer to a cellphone number. When that ip phone is called from another ip phone, call forward no answer works. But when that ip phone is called from analog phone behind Audiocodes, call forward no answer doesn't work.
Does anybody have any idea about this issue?