[Serusers] Failover PSTN Gateways

[Adrian Georgescu]

On Sep 2, 2004, at 12:22 PM, Jan Janak wrote:

> Just out of curiosity, in the document you mention that subsequent
> requests (ACK, BYE) go to the same gateway, but that is something that
> would happen anyway because the gateway puts its Contact into reply and
> record-routing will route subsequent messages to that contact.
> Do you plan to write any additional support for that or did I just
> misunderstand the text ?

Yes there will be some additional support to make sure same route si 
followed regardless of how the phone (mis)behaves.

>   Jan.
>
> On 02-09 11:18, Adrian Georgescu wrote:
>> December 2004
>>
>> On Sep 2, 2004, at 6:31 AM, Atle Samuelsen wrote:
>>
>>> Howdy Adrian!
>>>
>>> Do you know when you whing you'll be finnish with this project? or
>>> atleast ready for use?
>>>
>>>
>>> -atle
>>>
>>> * Adrian Georgescu <ag at ag-projects.com> [040902 00:42]:
>>>> There is some work in progress:
>>>>
>>>> http://download.dns-hosting.info/SERLCR/README
>>>>
>>>> Adrian
>>>>
>>>>>>>>>>>>
>>>> Hi list,
>>>>
>>>> We have a setup with 2 redundant stateful SER SIP-Servers with
>>>> accounting.
>>>>
>>>> For calls to the PSTN we have 2 ISDN-PRI gateways connected to
>>>> different ISDN-PRI lines.
>>>>
>>>> We need to implement a dynamic failover mechanism and load 
>>>> balancing.
>>>>
>>>> a) Incoming calls: No problem, the PSTN switch takes care of that
>>>> b) Outgoing calls:
>>>>  Both GWs are registered at both SERs; calls are usually relayed 
>>>> with
>>>> "t_relay_to_udp(x.x.x.x, "5060");"
>>>>  But how can I implement a quick failover including 
>>>> load-distribution
>>>> between those gatways?
>>>>  I.e. if I receive "busy here" or no response after a short period
>>>> after the "invite", the call should be redirected to the other GW.
>>>>
>>>> Thanks in advance for your help!
>>>>
>>>> Best regards,
>>>> Gerhard
>>>>
>>>>
>>>
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>>>
>>
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