[Serusers] Failover PSTN Gateways
Ranga
rrao_v at yahoo.com
Thu Sep 2 07:10:40 CEST 2004
Atle,
We are ready with this except for short period thing.
We are not thinking about solving that issue as it is
a least important thing for us. Yes, we are looking
for the feature to be added in tm module so that we
can have configurable ring times for individual calls.
-Ranga
--- Atle Samuelsen <clona at camaro.no> wrote:
> Hi Ranga (and Adrian)
>
> I was just qurius on when they would be finished
> with the software.
> Failure routes is a good thing ;-)
>
> -Atle
>
> * Ranga <rrao_v at yahoo.com> [040902 07:02]:
> > Adrian/Atle,
> >
> > We did this using failure routes. Only problem
> was,
> > wait time ( invite timer ) for both gateways is
> same
> > as we cant have two timers with different timeout
> > values in ser.
> >
> > See inline comments.
> >
> > -Ranga
> >
> > --- Atle Samuelsen <clona at camaro.no> 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?
> >
> > Load distribution may require a seperate
> module/exec
> > script to take routing decisions. When acc is
> enabled
> > you can query database for active calls. We can
> > quickly check which gateway is handling how many
> calls
> > and change the host portion of URI before t_relay.
>
> >
> > > > 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.
> > Busy here can be easily handled in failure route.
> > Having short duration for first call and little
> longer
> > timeout for next call is not possible at the
> moment, I
> > guess.
> >
> > > >
> > > > Thanks in advance for your help!
> > > >
> > > > Best regards,
> > > > Gerhard
> > > >
> > > >
> > >
> > > >
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> > > >
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> > >
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> >
> >
> >
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