Trying to register the Asterisk to the Cisco BTS 10200. The BTS challenges the REGISTER with a 401 Unathorized and sets ?qop=auth? in the WWW-Authenticate header. The Asterisk should reply with a nonce-count in the Authorization header of the new REGISTER but it does not send this field. What Asterisk configuration will force the PBX to send the NC value? Thanks, Mark Reliably Transmitting: REGISTER sip:customer2.lab2.cbeyond.net SIP/2.0 Via: SIP/2.0/UDP 90.0.4.57:5060;branch=z9hG4bK3483fca1 From: <sip:6783975000@customer2.lab2.cbeyond.net>;tag=as6c243000 To: <sip:6783975000@customer2.lab2.cbeyond.net> Call-ID: 6e58367c4fbd72086c3a4a104e11c709@90.0.4.57 CSeq: 102 REGISTER User-Agent: Asterisk PBX Expires: 160 Contact: <sip:6783975000@90.0.4.57> Event: registration Content-Length: 0 (no NAT) to 90.0.4.76:5060 shitbrick*CLI> Sip read: SIP/2.0 401 Unauthorized Via: SIP/2.0/UDP 90.0.4.57:5060;branch=z9hG4bK3483fca1;received=90.0.4.57 From: <sip:6783975000@customer2.lab2.cbeyond.net>;tag=as6c243000 To: <sip:6783975000@customer2.lab2.cbeyond.net>;tag=1_1102_t12492_ 6472 Call-ID: 6e58367c4fbd72086c3a4a104e11c709@90.0.4.57 CSeq: 102 REGISTER WWW-Authenticate: Digest realm="customer2.lab2.cbeyond.net", nonce="bdcaa6ccd20111e818ecdba14d97e283", algorithm=MD5, qop="auth" Content-Length: 0 8 headers, 0 lines 12 headers, 0 lines Reliably Transmitting: REGISTER sip:customer2.lab2.cbeyond.net SIP/2.0 Via: SIP/2.0/UDP 90.0.4.57:5060;branch=z9hG4bK3483fca1 From: <sip:6783975000@customer2.lab2.cbeyond.net>;tag=as6c243000 To: <sip:6783975000@customer2.lab2.cbeyond.net> Call-ID: 6e58367c4fbd72086c3a4a104e11c709@90.0.4.57 CSeq: 103 REGISTER User-Agent: Asterisk PBX Authorization: Digest username="6783975000", realm="customer2.lab2.cbeyond.net", algorithm="MD5", uri="sip:customer2.lab2.cbeyond.net", nonce="bdcaa6ccd20111e818ecdba14d97e283", response="962a1259e5b2afaf18289aeaf5427485", opaque="" Expires: 160 Contact: <sip:6783975000@90.0.4.57> Event: registration Content-Length: 0 (no NAT) to 90.0.4.76:5060 Sip read: SIP/2.0 400 Bad Request Via: SIP/2.0/UDP 90.0.4.57:5060;branch=z9hG4bK3483fca1;received=90.0.4.57 From: <sip:6783975000@customer2.lab2.cbeyond.net>;tag=as6c243000 To: <sip:6783975000@customer2.lab2.cbeyond.net> Call-ID: 6e58367c4fbd72086c3a4a104e11c709@90.0.4.57 CSeq: 103 REGISTER Content-Length: 0 MARK G. MOODY Network Architecture