asterisk users - Jan 2015 - Problem with Cisco Phones

Possibly slightly off topic, has anyone ever had Cisco 79xx Series phones come
up with "cannot complete conference" errors when trying to conference
two calls together?


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I'm willing to bet you are forcing the use of G729.  7940 and 7960 phones
can only do a single G729 channel, and if you require G729 for the second
leg of a conference, it will fail.


On Tue, Jan 20, 2015 at 10:03 AM, Jordan Cook - Gyron Networks <
jordan.cook at gyron.net> wrote:
>  Possibly slightly off topic, has anyone ever had Cisco 79xx Series
> phones come up with ?cannot complete conference? errors when trying to
> conference two calls together?
>
>
> This message may be private and confidential. If you have received this
> message in error, please notify us and remove it from your system.
>
> Gyron may monitor email traffic data and the content of email for the
> purposes of security and staff training.
>
> Gyron Internet Ltd is a limited company registered in England and Wales.
> Registered number: 4239332. Registered office: 3 Centro, Boundary Way,
> Hemel Hempstead, HP2 7SU. VAT reg no 804 2532 63. Gyron is a registered
> trademark.
>
> Gyron is a Deloitte Technology Fast 50 ranked company.
>
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We were using G722 - I thought similarly and tried a call with alaw. Same
problem occurred, any other ideas?
> I'm willing to bet you are forcing the use of G729.  7940 and 7960
phones can
> only do a single G729 channel, and if you require G729 for the second leg
of a
> conference, it will fail.


This message may be private and confidential. If you have received this message
in error, please notify us and remove it from your system.

Gyron may monitor email traffic data and the content of email for the purposes
of security and staff training.

Gyron Internet Ltd is a limited company registered in England and Wales.
Registered number: 4239332. Registered office: 3 Centro, Boundary Way, Hemel
Hempstead, HP2 7SU. VAT reg no 804 2532 63. Gyron is a registered trademark.

Gyron is a Deloitte Technology Fast 50 ranked company.