Page History

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Related Articles:

• Using Tenor as an Analog Device in a Lync SBC SBA Deployment
• Creating and Modifying Entries to Transformation Tables
• Creating Call Routing Logic with Regular Expressions

Overview

• This article describes the configuration and settings necessary for removing Calling Extension/Called Extension in a Transformation Table for ext=xxxx input value.
• This document assumes that PSTN - Sonus SBC 1000/2000 - Microsoft Lync 20XX setting is completed in following topology. 

Topology

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Use Case

In some cases, Lync users may be created with a Line URI with tel:+XXXXXXXXXXX;ext=XXXX format as shown below:

In such situations, when a call is received from the Lync Mediation Server, the INVITE message contains ;ext=xxxx in the Request URI. However, in a LYNC >> Sonus SBC 1000/2000 >> Tenor call setup, TENOR expects the REQUEST URI without ext=xxxx, therefore Sonus SBC 1000/2000 will

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• Lync sends an INVITE to the Sonus SBC 1000/2000:

• SIP Registered Tenor endpoint expects the INVITE from the Sonus SBC 1000/2000:

However, if ext=xxxx is not removed from the TO HEADER, the Sonus SBC 1000/2000 sends out an INVITE to the Tenor with:

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Resolving the Issue

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Remove the Extension Number in the relevant Transformation Table (in this example we are showing how to remove Calling as well as Called Extension Numbers) as shown below:

Subsequently if the above call is placed again, the transformation table will modify the TO header and remove ext=xxxx which then allow call to be successful as shown below:

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Sonus SBC 1000/2000 Removes the ext=xxxx, using the Transformation Table and Routes the Call

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