asterisk users - Sep 2009 - limit concurrent calls on trunk supporting multiple DID

Hello guys,

I've one SIP trunk that support multiple DID. Only the trunk is
documented in sip.conf (called DID is taken from the sip-header in
real time).
I would like to limit the number of simultaneous calls on each DID. Is
there a way to achieve this ?
My understanding is that the SIP configuration parameter
"limitonpeers" will limit at the trunk level, right ?

Thanks in advance
Patrick

You can set some kind of counter in the dial plan, call an AGI script,  
use func_odbc to make database calls, or otherwise achieve this  
programatically.

--
Sent from mobile device

On Sep 17, 2009, at 1:16 AM, Patrick <asterisk-users at ict-synergy.be>  
wrote:
> Hello guys,
>
> I've one SIP trunk that support multiple DID. Only the trunk is
> documented in sip.conf (called DID is taken from the sip-header in
> real time).
> I would like to limit the number of simultaneous calls on each DID. Is
> there a way to achieve this ?
> My understanding is that the SIP configuration parameter
> "limitonpeers" will limit at the trunk level, right ?
>
> Thanks in advance
> Patrick
>
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At 7:16 AM on 17 Sep 2009, Patrick wrote:
> I've one SIP trunk that support multiple DID. Only the trunk is
> documented in sip.conf (called DID is taken from the sip-header in
> real time).
> I would like to limit the number of simultaneous calls on each DID. Is
> there a way to achieve this ?
I think you could use GROUP() and GROUPCOUNT() for that.  I do that for
Queue calls currently, so each agent only gets one call at a time.  It
would go something like this (entirely untested):

[incoming]
exten => _X.,1,Set(DID=${EXTEN})
exten => _X.,n,GotoIf($[GROUP_COUNT(${DID})=0]?accept)
exten => _X.,n,Busy()

exten => _X.,n(accept),Set(GROUP()=${DID})
; Now let the call through as usual...
exten => _X.,n,Goto(mainmenu,s,1)

That puts each call into a group named by the DID, and returns Busy
if there is another call on the same DID.

-- 

C. Chad Wallace, B.Sc.
The Lodging Company
http://www.skihills.com/
OpenPGP Public Key ID: 0x262208A0

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