<--- Received SIP response (544 bytes) from UDP:10.59.108.25:5060 --->
SIP/2.0 407 Proxy Authentication Required
Call-ID: 1528b069-20db-4cce-b49c-6c36c9a99a38
Via: SIP/2.0/UDP 127.0.0.1:5060;received=10.15.58.194;branch=z9hG4bKPj4e3475ef-67de-4123-a79b-ae1c8751f0c2;rport=5060
To: <sip:9714275xxxp@fixedimsmey.duentdxb.duvoip.fmc>;tag=637bbbea-6410e4581d46c5f
From: <sip:9714275xxxp@fixedimsmey.duentdxb.duvoip.fmc>;tag=c484ba0f-4ca0-47f3-a322-325cac86f7e2
CSeq: 47751 OPTIONS
Date: Tue, 14 Mar 2023 21:17:12 GMT
Warning: 399 sbc.du.com "IP association no match, user not registered"
Content-Length: 0