----- Original Message -----
From: Aaron Anderson
[mailto:[EMAIL PROTECTED]
To: Asterisk Users Mailing List -
Non-Commercial Discussion [mailto:[EMAIL PROTECTED]
Sent:
Fri, 28 Jul 2006 03:52:59 -0300
Subject: [asterisk-users] Multiple Outbound
SIP Trunks
> I have 3 sip trunks registered with an outside provider, however
> asterisk always seems to work when going out the third trunk. Any way
> to round-robin this so that we can make more than one outbound call at a
> time?
Currently chan_sip has no capability to group together "outbound trunks" as you
can in zaptel. This is mostly due to the fact that on SIP you don't know that
you can't send someone a call until you send it to them, or you keep track on
your side based on predetermined rules.
You might need to end up using the GROUP capability to limit each trunk to one
call each and have failover to the next.
[macro-call-trunk]
exten => s,1,GotoIf($[${GROUP_COUNT(${ARG1})}=0]?avail:busy)
exten => s,n(avail),Set(GROUP()=${ARG1})
exten => s,n,Dial(${ARG2}||t)
exten => s,n,Hangup
exten => s,n(busy),Noop()
exten => _1NXXNXXXXXX,1,Macro(call-trunk|trunk-1|SIP/[EMAIL PROTECTED])
exten => _1NXXNXXXXXX,n,Macro(call-trunk|trunk-2|SIP/[EMAIL PROTECTED])
exten => _1NXXNXXXXXX,n,Macro(call-trunk|trunk-3|SIP/[EMAIL PROTECTED])
This is just really quickly done...
Basically the macro checks to see if the group count for the trunk is 0, if it
is then the current call is set to use the group (which means the next time
group_count gets called while this call is up, it'll return 1) and the
destination is dialed. Otherwise it gets returned to the dialplan and it tries
the next trunk.
There may be other solutions out there but you could expand on this one so that
a trunk could support, for example, 2 outbound calls at a time. You would just
see if the group_count is equal to 2 and if so jump to busy, otherwise avail.
> Thanks in advance,
> Aaron
Joshua Colp
Digium
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