ProSBC:Skype for Business S4B TCP

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This article describes how to set up a Telcobridges ProSBC for interworking between an ITSP’s SIP Trunk and a Skype For Business Mediation Server using a TCP connection.

NOTE: The SIP Trunk uses G.711 in this test. There is no transcoding available.


  • ProSBC devices must be installed as described in release 3.1.x. Release 3.0.x is not supported for TCP connections installation guides.
  • Skype for Business 2015. For additional information on Skype for Business 2015, visit Microsoft

Example Environment

Skype Environment.png

ProSBC Configuration for S4B

(Step 1)
Create IP Network
(Step 2)
Create Protocol Stack
(Step 3)
Create Call Route

Example Configuration

ProSBC SIP trunking configuration for Microsoft Skype for Business.


Call Trace Test Call TBReport Advanced Troubleshooting of ProSBC