> What I mean is I want a call to go out on ProviderA, UNLESS it's down and
> then go to ProviderB.
> I want it to ring 30 seconds and then Hangup if nobody has answers.
This one's actually a bit more complicated than it first seems, since you need
to know how each provider reports status when it's unavailable. We run the
following AEL macros to achieve something similar:
(apologies to the list for the big chunk of code below - I'm not sure how
well/if the list handles attachments)
// DIAL NUMBER (with a range of routing options)
macro outbound (number, route1, route2, route3, route4, route5) {
// set correct outbound caller id
if (${LEN(${CALLERID(number)})} < 10 & ${LEN(${CALLERID(number)})} > 0)
{
if (${LEN(${DB(callerid/${CDR(accountcode)})})} > 9) {
CALLERID(number)=${DB(callerid/${CDR(accountcode)})};
} else
Set(CALLERID(number)=);
};
dialstart:
switch (${route1}) {
case dundi:
if (${number:0:2} = 00) {
&dundi-e164 (${number:2});
} else if (${number:0:1} = 0) {
&dundi-e164 (44${number:1});
} else
&dundi-e164 (${number});
break;
case provider1:
&dialout (IAX2/provider1/${number});
break;
case provider2:
&dialout (IAX2/provider2/${number});
break;
case provider3:
&dialout (IAX2/provider3/${number});
break;
case pstn:
&dialout (Zap/g1/${number});
break;
default:
NoOp (invalid route: ${route1});
};
if (${LEN(${route2})} > 0) {
route1=${route2};
} else {
Playtones (congestion);
Congestion ();
};
if (${LEN(${route3})} > 0)
route2=${route3};
if (${LEN(${route4})} > 0)
route3=${route4};
if (${LEN(${route5})} > 0)
route4=${route5};
goto dialstart;
};
// DIAL NUMBER (ignoring anything except busy)
macro dialout (dialstring) {
Dial (${dialstring},,TW);
switch (${DIALSTATUS}) {
case BUSY:
Playtones (busy);
Busy ();
break;
case CONGESTION:
Playtones (busy);
Busy ();
break;
};
};
You can then dial from your "main" dialplan something like this for UK
landlines:
exten => _0[12]XXXXXXXXX,1,Macro(outbound,${EXTEN},provider1,provider2,pstn)
The "dialout" macro ignores any responses from the SIP/IAX provider except Busy
or Congestion (we have a provider which provides "congestion" when the dialled
number is busy, that's why it's there). So, if the provider's server is
unavailable (through qualify=yes or whatever), it'll fall through as channel
status "unknown" and loop onto the next provider.
On an outbound call made from one of your users, why would you want a 30 second
timeout? Surely you'd want to keep ringing the callee until the caller (i.e.
your user) loses interest and hangs up their device? The length of time for a
device to be rung before doing something else is usually determined by the
recipient, not the initiator.
Hope that helps.
Regards,
Chris
--
C.M. Bagnall, Director, Minotaur I.T. Limited
For full contact details visit http://www.minotaur.it/chris.html
This email is made from 100% recycled electrons
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