Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

conference via PBX interco

Hi everybody,

I need some help or ideas.

This is my issue and I don't know how to solve it

------------------------------------------------

Topology :

IP phones <--> CCM 3.3.3 <--> IOS gateway 12.3.1a <--PRI_E1--> PBX <--> traditional phones <--> PSTN

------------------------------------------------

Test 1 : failed

I want to have an ad-hoc conference using the softkley conference button on the IP phone A

When Ip phone A calls traditional phone B and IP phone A calls traditonal phone C, as soon as the ip phone tries to activate the ad-hoc conference trad phone B and C hang up

---------------------------------------

Test 2 : success

When I do the same test via the PBX to the PSTN

Ip phone A calls PSTN phone D and PSTN phone E and want to activate the ad-hoc conference it works

-------------------------------------

Test 3 : success

When I do the same test between 3 local ip phones it ad-hoc conference works too

Have you any idea concerning the failed test 1

Waiting for your help as soon as possible

Irene

1 REPLY
Cisco Employee

Re: conference via PBX interco

Sounds like there may be a codec issue. The conference bridge is expecting G.711. If the PBX calls use G.729 then you will need a transcoder.

Please verify your codec and transcoding configuration. You may need to look at Detailed CCM traces to verify the codecs are negotiated probperly and that the transcoder is invoked properly.

105
Views
0
Helpful
1
Replies
CreatePlease login to create content