asterisk users - Jun 2011 - ITSP failover for PRI

ITSP failover for PRI

 

Hello All,

 

We're using an Asterisk based SIP-T1 trunking gateway and would like to
implement failover between two ITSPs.

 

If we connect a soft phone to the gateway with the following lines in
extensions.conf failover works. 

If one ITSP is unavailable the call flow cascades to the second ITSP and
connects with audio.

 

[outgoing]

exten => _1NXXNXXXXXX,1,NoOp(${CALLERID(all)="" <>}) exten
=>
_1NXXNXXXXXX,2,Dial(SIP/${EXTEN}@ITSP1)

exten => _1NXXNXXXXXX,3,Dial(SIP/${EXTEN}@ITSP2)

 

If we attempt calls from the PBX over the PRI connected to the Astlinux
Gateway the calls connects, but there is no audio.

 

           This is what we see:

            ITSP1:

Accepting call from 'XXXXXX' to 'XXXXXX' on channel 0/22, span 1
Executing
[XXXXXX at outgoing:1] NoOp("DAHDI/22-1", """
<XXXXXX>") in new stack Executing
[XXXXXX at outgoing:2] Dial("DAHDI/22-1", "SIP/XXXXXX at
ITSP1") in new stack
Called XXXXXX at ITSP1

 

SIP/ITSP1-000000c6 is circuit-busy     (This result is because the ITSP1
account is blocked for testing)

Everyone is busy/congested at this time (1:0/1/0)

 

         ITSP2:

Executing [XXXXXX at outgoing:3] Dial("DAHDI/22-1", "SIP/XXXXXX
at ITSP2") in new
stack Called XXXXXX at ITSP2

SIP/ITSP2-000000c7 is making progress passing it to DAHDI/22-1

SIP/ITSP2-trunk-000000c7 answered DAHDI/22-1

 

Can someone please make suggestions or point us in the right direction to
resolve this no audio issue?

 

Thank you

 

 

 

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2011/6/19 Claude Hayn <chayn123 at gmail.com>
> ITSP failover for PRI****
>
> ** **
>
> Hello All,****
>
> ** **
>
> We?re using an Asterisk based SIP-T1 trunking gateway and would like to
> implement failover between two ITSPs.****
>
> ** **
>
What about incoming calls ?
Do you have a way to have calls that normally comes from ITPS1 to comes from
ITSP2 ?
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On 06/20/2011 04:20 AM, Olivier wrote:
> What about incoming calls ?
> Do you have a way to have calls that normally comes from ITPS1 to
> comes from ITSP2 ?
No, there is no BGP for the PSTN.

-- 
Alex Balashov - Principal
Evariste Systems LLC
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Suite 2200
Atlanta, GA 30303
Tel: +1-678-954-0670
Fax: +1-404-961-1892
Web: http://www.evaristesys.com/