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if one device pool phone has used codec g711 and another one g722 is there any problem cause?

if one device pool phone has used codec g711 and another one g722 is there any problem cause?

3 REPLIES

if one device pool phone has used codec g711 and another one g72

Hi

i think you will find the problem on DP which will use the region of g711 , because g711 & g722 enabled phones will prefer g722. I hope to disable the g722 because the below:-

-G.722 and the proprietary "Wideband" codec have more than double the width of G.711. As a result, fidelity is much better, and music even sounds good. It doesn't meet the audiophile's strict standards for a home theatre, but from a phone handset or headset, the difference is striking.  Keep in mind that a wideband headset or handset is required to realize the audio performance benefits of G.722.  As an added benefit, G.722 consumes the same amount of bandwidth (64 kb/s) as G.711. 

The Downside

Not all devices and features support G.722. As such, be careful where G.722 is enabled within your enterprise. For example, problems with call park and ad hoc conferences arise when G.722 is enabled. When you use the enterprise parameter with features such as ad hoc conferencing and call park, change the setting to "Disabled" and update the device pools for the phones.

Enabling G.722 Across the Cluster:-

By default, the cluster is enabled to advertise G.722 as an available codec if both phones support the codec.

Codec negotiation involves two steps. First, the phone must advertise the supported codec(s) to Cisco Unified Communications Manager (not all phones support the same set of codecs). Second, when Cisco Unified Communications Manager gets the list of supported codecs from all phones that are involved in the call attempt, it chooses a commonly supported codec based on various factors, including the region pair setting.

Please also the below bug

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtq97254

Thank you

please rate all useful information

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if one device pool phone has used codec g711 and another one g72

Islam,

You are correct with the assumption if the CUCM is below version 9, in version 9 you can build/adjust codec preference and prioritize G711 over G722.

HTH,

Chris

if one device pool phone has used codec g711 and another one g72

Hi

+5 , Many thanks for your usual help and your professional information.

Thanks

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