[asterisk-users] Problem with Cisco Phones

Scott Griepentrog
Tue, 20 Jan 2015 16:32:06 -0000

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?
>
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