Microsoft KB Archive Search

Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

  1. Home
  2. PSTN call is disconnected in Lync 2013 when you enable the media bypass setting

PSTN call is disconnected in Lync 2013 when you enable the media bypass setting

View products that this article applies to.

Symptoms

Consider the following schenario:
  • You enable the media bypass setting in a Microsoft Lync Server 2010 or Lync Server 2013 environment.
  • A user signs in to Microsoft Lync 2013.
  • The user makes a call to a public switched telephone network (PSTN) telephone that is connected to version 8.6 of Cisco Unified Communications Manager (CUCM).
In this situation, the call is disconnected.

↑ Back to the top

Cause

This issue occurs because a 151 kilobits per second (Kbps) value of bandwidth is required by G.711 u-Law. Therefore, when a call is in an environment in which bandwidth is less than 151 Kbps, media manager sets the bandwidth to 151 Kbps incorrectly.

↑ Back to the top

Resolution

To resolve this issue, install the following update:
2889929 October 2014 update for Lync 2013 (KB2889929)

↑ Back to the top

More Information

Third-party information disclaimer
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

↑ Back to the top

Keywords: kbfix, kbqfe, kbsurveynew, kbexpertiseinter, kb

↑ Back to the top

Article Info
Article ID : 2996289
Revision : 1
Created on : 1/7/2017
Published on : 10/14/2014
Exists online : False
Views : 303