Dear List, I have a Cisco 1700 FXO and set up a dial peer to talk to ser, on a sip session. I am trying to establish how I could identify a sip registered user in ser, based on the caller id value obtained from the sip session record passed from the Cisco to sip server. The identified user in ser will be recepiet (To:) in the INVITE message. Appreciate yours assistance. Deen