I've been migrating from Lync 2010 to SfB 2015 for some time, so now got a problem with sip trunk like this
https://social.technet.microsoft.com/Forums/lync/en-US/adeca19e-ce8a-40cb-bf6a-69eff77cde7a/disable-lync-sip-options-requests?forum=ocsvoice
On current dial-peer to lync having this
http://www.cisco.com/c/en/us/td/docs/ios/voice/cube/configuration/guide/vb_book/vb_book/vb_9321.html
With Lync 2010 conf phone calls work fine with this conf on cisco:
As PSTN is using 3925 Version 15.2(4)M4
dial-peer voice 51001 voip
description ==== to MS Lync ====
preference 1
destination-pattern 5[12349]...
session protocol sipv2
session target ipv4:10.100.2.14:5060
session transport tcp
incoming called-number [189].T
voice-class sip early-offer forced
voice-class sip profiles 1000
voice-class sip block 183 sdp present
voice-class sip options-keepalive up-interval 30 down-interval 65 retry 3
voice-class sip bind control source-interface Loopback0
voice-class sip bind media source-interface Loopback0
dtmf-relay rtp-nte sip-notify sip-kpml
codec g711alaw
no vad
!
dial-peer voice 51002 voip
description ==== to MS Lync ====
huntstop
preference 2
destination-pattern 5[12349]...
session protocol sipv2
session target ipv4:10.100.2.15:5060
session transport tcp
incoming called-number [189].T
voice-class sip early-offer forced
voice-class sip profiles 1000
voice-class sip block 183 sdp present
voice-class sip options-keepalive up-interval 30 down-interval 65 retry 3
voice-class sip bind control source-interface Loopback0
voice-class sip bind media source-interface Loopback0
dtmf-relay rtp-nte sip-notify sip-kpml
codec g711alaw
no vad
After restart Mediation service on SFB 2015 servers a few calls got work but then in Windows Event appeared an error MEDIATIONSERVER_GATEWAY_OPTIONS_FAILED cause the Cisco gateway seems that is not recognising this message and thus is not replying to the Lync Server.
Need a help what gonna to do.
