[asterisk-users] DTMF between Asterisk servers.

[Mark Hamilton]

Hello, 

 

I'm a little confused on DTMF.

A sip peer is registered on two Asterisk servers. No dtmfmode is set for
them, the sip peer is 999 on Asterisk 1 and 999 on Asterisk 2. They both
register on each other.

 

A call comes in on Asterisk server 1, provider 1, dtmf=inband. Then the call
is transferred to Asterisk 2:

RetryDial(/var/lib/asterisk/sounds/connecting,15,10,SIP/12351 at 65.xx.xx.10,,t
T,)

Where 12351 accepts the call on Asterisk 2, and in some cases, that call is
transferred out to a PSTN number, or wherever, but not within Asterisk
anymore via provider2, dtmf=rfc2833.

 

When the call comes in, I'd like it to relay DTMF just dandy. How can I do
so?

There is no NAT between the Asterisk servers or in front of them. However,
Asterisk2 has iptables which allows all UDP traffic  to/fro Asterisk1. When
Asterisk2 transfers the call to external endpoints, there might be a LAN,
but relative ports are open on those LANs.

 

Please help.

 

Thanks in advance,

Mark.

 

 

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