Hi All,

   Cisco 7975G sip phone  not sending Authorization parameter after receiving 401 from Server. So  REGISTER message going in loop with 3rd party software.

But with other Server REGISTER is Working. I see Difference in WWW-Authorization parameter in Response

So Please help whether cisco phones support it or not??

Attaching working and non- working  register  text

Working Case

WWW-Authenticate: Digest realm="Local_251",nonce="'qgf@|:6?:2rfNE6a['wSR3>=6MY*HLuIrjdP7}y}*WX*?M(Asu5Ue,,jmHHWFgc",algorithm=MD5,qop="auth"

Not Working Case

WWW-Authenticate: Digest nonce="1498209210:ecb3b18c9231f9e4f3ad62514c5d9fa6",algorithm=MD5,realm="mbg",qop="auth"

Regards,

Venkateshwaran