Category: SIP 487

• 403 forbidden 404 not found 486 Busy Here Call loop between Lync and Gateway Lync Lync 2013 SIP 403 SIP 486 SIP 487 SIP Channels get Saturated Unassigned Number

  Call loop between Lync and Gateway

  As part of ongoing expansion we recently added another DDI range. Most of the new range would be dormant initially. Of course I wanted to catch all the calls that were unassigned and send them off to a RGS.Here is where the plot thickens…This seemed to work well in Lync…

  09/10/2013
• 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