What to do to support "Require: eventlist"?
Hello,
For a project we have to deliver the option to support a busy lamp field on the Polycom devices on the access side. From the testing performed so far we have reached the temp conclusion that it seems that the ACME(4500) returns a 420 Bad extension towards the core network when receiving the following NOTIFY message:
NOTIFY sip:+31175652002@10.10.60.162:5060;transport=udp;ue-addr=135.85.15.214 SIP/2.0
Via: SIP/2.0/UDP 10.10.163.4:5060;branch=z9hG4bK1787e65c7edc85004397ee95c9ec96cb50162d26-1357817237359471
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bK_001_939883068-944086332;lsstag=pps-128188-2.61536
Via: SIP/2.0/UDP 10.10.60.120;received=10.10.60.120;branch=z9hG4bKBroadWorks.1lqq237-10.10.163.4V5060-0-607571809-336581106-1357817237336