asterisk users - Feb 2008 - How to balance traffic between 2 gateways ?

Hi,

Is it possible and safe to split or balance outgoing calls to 2 different
sip-to-tdm voice gateways ?

I need 5 E1 ports and the boxes have 4 ports each.
Setup would be :

PSTN --<1xE1>-- Gateway1 ---<2xE1>---- PBX ---- TDM phones
                               |
                             LAN ------------------ Asterisk ----- SIP
Phones
                               |
PSTN --<1xE1>-- Gateway2 ---<1xE1>---- PBX ---- TDM Phones

Regards
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On 2/7/08, Olivier <oza-4h07 at myamail.com>
wrote:
> Hi,
>
> Is it possible and safe to split or balance outgoing calls to 2 different
> sip-to-tdm voice gateways ?
>
> I need 5 E1 ports and the boxes have 4 ports each.
> Setup would be :
>
> PSTN --<1xE1>-- Gateway1 ---<2xE1>---- PBX ---- TDM phones
>                                 |
>                              LAN ------------------ Asterisk ----- SIP
> Phones
>                                |
> PSTN --<1xE1>-- Gateway2 ---<1xE1>---- PBX ---- TDM Phones
>
> Regards
>
Sure:

context dial-out {
  _X. => {
    if ("${GROUP_COUNT(gw2)}">"${GROUP_COUNT(gw1)}") {
      Set(OUTBOUND_GROUP=gw1)
      Dial(SIP/${EXTEN}@gw1)
    } else {
      Set(OUTBOUND_GROUP=gw2)
      Dial(SIP/${EXTEN}@gw2)
    }
  }
}

Regards,
Atis

-- 
Atis Lezdins
VoIP Developer,
IQ Labs Inc.
atis at iq-labs.net
Skype: atis.lezdins
Cell Phone: +371 28806004
Work phone: +1 800 7502835

Atis Lezdins wrote:
> On 2/7/08, Olivier <oza-4h07 at myamail.com> wrote:
>   
>> Hi,
>>
>> Is it possible and safe to split or balance outgoing calls to 2
different
>> sip-to-tdm voice gateways ?
>>
>> I need 5 E1 ports and the boxes have 4 ports each.
>> Setup would be :
>>
>> PSTN --<1xE1>-- Gateway1 ---<2xE1>---- PBX ---- TDM phones
>>                                 |
>>                              LAN ------------------ Asterisk ----- SIP
>> Phones
>>                                |
>> PSTN --<1xE1>-- Gateway2 ---<1xE1>---- PBX ---- TDM Phones
>>
>> Regards
>>
>>     
>
> Sure:
>
> context dial-out {
>   _X. => {
>     if ("${GROUP_COUNT(gw2)}">"${GROUP_COUNT(gw1)}")
{
>       Set(OUTBOUND_GROUP=gw1)
>       Dial(SIP/${EXTEN}@gw1)
>     } else {
>       Set(OUTBOUND_GROUP=gw2)
>       Dial(SIP/${EXTEN}@gw2)
>     }
>   }
> }
>
> Regards,
> Atis
>
>   
Old variable syntax but this flips which gateway is used with every 
call, and fails over to the other line in the event of any negative 
status return, of course it could be cleaner, if both gateways where 
down this would make an infinite loop.

[macro-lb]
; ${ARG1} - PhoneNumber
exten => s,1,GotoIf($["${LOADBALANCE}" = "0"]?5)
exten => s,2,SetGlobalVar(LOADBALANCE=0)
exten => s,3,Dial(${TRUNK_DENVER}/${ARG1})
exten => s,4,Goto(s,6)
exten => s,5,SetGlobalVar(LOADBALANCE=1)
exten => s,6,Dial(${TRUNK_DENVER2}/${ARG1})
exten => s,7,Goto(s,3)

-- 
Thank you and have a wonderful day,

Anthony Francis
Rockynet VOIP