Category: Call issues

• Call issues Call Timeout Known Issues SIP 487 SIP Error 487 Some Outgoing Calls timeout

  Some Outgoing Calls timeout

  I was working on a strange issue at a customer regarding Enterprise Voice from Lync.The issue:Some calls fail before call setup completes…In my case it was mostly landline calls, cell calls worked fine. A wireshark trace showed that Lync was “getting bored” waiting for a response from my SIP gateway.…

  13/06/2012
• 30 second drop Call issues hold Known Issues

  Calls on Hold Drop after 30 seconds

  Hold Times & Dropped Calls in Lync 2010 Depending on how the carrier is setup to respond to RTCP packets, even with a caller being on hold it still counts down against the session timer. There are some features in the trunk configuration that are enabled/disabled by default that by…

  22/12/2011