[Asterisk-Users] IAX2 Channels & Bandwidth

[Kevin P. Fleming]

Leif Madsen wrote:

> This is true if you are using IAX2 trunking.  This can be enabled with
> trunk=yes in your peer  configuration.  The other end must also
> support the trunking as well.

In addition, the codec you use must support trunking as well. As far as 
I can remember (haven't checked in a while), the G.711 codec does not 
support trunking. The wiki probably has the definitive list of which 
codes do and don't support it.