I am working on this issue but I am new to Asterisk.
We were asked to add Cisco phones (CP-8851) to the Asterisk PBX (v 126.96.36.199). We are also using SoliCall pbxmate. When trying to conference with Cisco phones in a filtered conference, the warnings below appear and the phones are not in a filtered conference (with Solicall).
[Jun 19 14:31:26] WARNING: chan_sip.c:14992 check_auth: username mismatch, have <6100>, digest has <SoliCallPairA_2>
[Jun 19 14:31:26] NOTICE: chan_sip.c:23575 handle_request_invite: Failed to authenticate device “CISCO EXEC” sip:firstname.lastname@example.org;tag=46803848500
[Jun 19 14:31:26] WARNING: chan_sip.c:21116 handle_response_invite: Received response: “Forbidden” from ‘“CISCO EXEC” sip:email@example.com;tag=as14155737’
Any ideas will be appreciated.