Sign in with Microsoft
Sign in or create an account.
Hello,
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.

Symptoms

In a Microsoft Skype for Business Server 2015 environment, you make an outgoing PSTN call by using the Skype for Business client. When the called party answers the Session Description Protocol (SDP) offer from the Skype for Business client with G.711alaw and G.711ulaw but puts G.711alaw on the top to indicate preference for G.711alaw, Skype for Business Mediation Server ignores this and sends G.711ulaw. This results in asymmetric codec and one-way voice for PBXs or phones who can't handle the asymmetric payload.

Resolution

To fix this issue, install the July 2019 cumulative update 6.0.9319.559 for Skype for Business Server 2015, Mediation Server.

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Was this information helpful?

What affected your experience?
By pressing submit, your feedback will be used to improve Microsoft products and services. Your IT admin will be able to collect this data. Privacy Statement.

Thank you for your feedback!

×