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Old March 9th, 2007   #1 (permalink)
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Smile ZONE on IP telephones

Hi

Can anybody tel me how the ZONEs on IP telephones works. Or can you tell me where to find anything about this. I know it have to do whit the compression on the IPphones (G711,G728 and G729AB) and so on.

At the moment all my IPphones are in ZONE 10, and I dont think the are compressed. I nead to compress some of my phones that are placed outside the main office. How do I do that. I have seleveral ZONES configured i the Call server, so what to do??

Regrds

JEH

Last edited by JEHartmann; March 10th, 2007 at 05:32 AM.
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Old March 10th, 2007   #2 (permalink)
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Say for example there are two phones sitting in 2 differnet zones, zone 1 and zone 2.
If u have selected the interzone bw statergy as BB. Then during the call setup process these phones will negotiate for the codec in such a way - they will arrange their codec list in the order (least bandwidth first and most bandwidth consuming codec last, prob g711), when there is a matching codec available on both sides, they will use that codec.
Instead if u choose BQ as bw statergy in ld 117 for interzone then g711 will the codec.....
i use BQ as intrazone statergy and BB can be considered in WAN environment.
All the best ....
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Old March 10th, 2007   #3 (permalink)
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First you need to decide the 2 CODECs you want to use. Typically you want G.711 for the best Quality. Then you build a new zone and define the Bandwidth strategy for that zone. You have 2 settings Intrazone and Interzone.

So lets say Zone 10 is local and Zone 20 is the remote area. If the remote area has good bandwidth within it's area, but not back to the main, you would want to set this up as follows:

--------- Zone 10 Zone 20
Intrazone BQ BQ
Interzone BB BB

This way Zone 20 calling Zone 20 gets G.711 while a call to Zone 10 gets what ever other CODEC you have activated.
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Old March 10th, 2007   #4 (permalink)
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Hi fletch

Thank you for an excelent and quick answer, It was so simple and clear that even I understod it.

Regrds


JEH
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