[cisco-voip] VoIP Failover Path

[Alex]

Is that TEHO-style call routing you are trying to achieve in case PRI goes 
down in the local office?
I can't see why not, just work out your dial plan and you should be cool.
Rgds
Alex

----- Original Message ----- 
From: "Paul Choi" <asobihoudai at yahoo.com>
To: "Todd Simons" <tsimons at delphi-tech.com>; "Alex" <ecralar at hotmail.com>; 
<cisco-voip at puck.nether.net>
Sent: Wednesday, February 27, 2008 6:08 PM
Subject: Re: [cisco-voip] VoIP Failover Path


> On this topic, is it possible to have failover for PRI
> to PRI over the WAN?
>
> I have three offices each that can call each other
> over their T1 circuits, each with their own dedicated
> PRI. In the event that one of the PRIs fails, can I
> route calls over the other two PRI circuits through
> the WAN for failover?
>
> These offices are all using CCME4.1.
>
> Paul
>
>
> --- Todd Simons <tsimons at delphi-tech.com> wrote:
>
>> Thanks!
>>
>> I know about additional dial-peers, unfortunately
>> you can only have one
>> session target per dial peer.
>>
>>
>>
>>  I found this about PSTN Fallback:
>>
>>
> http://www.cisco.com/en/US/docs/ios/12_2/12_2x/12_2xa/feature/guide/ft_p
>> stn.html
>>
>>
>>
>> The PSTN Fallback feature and enhancement provide
>> the following
>> benefits:
>>
>> *Automatically routes a call to an alternate
>> destination when the data
>> network is congested at the time of the call setup.
>>
>> *Enables the service provider to give a reasonable
>> guarantee about the
>> quality of the conversation to its Voice over IP
>> (VoIP) users at the
>> time of call admission.
>>
>> *Provides delay, jitter, and packet loss information
>> for the configured
>> IP addresses.
>>
>> *Caches call values from previous calls. New calls
>> do not have to wait
>> for probe results before they are admitted.
>>
>> *Enables a user-configurable cause code display that
>> indicates the type
>> of call rejection.
>>
>>
>>
>> The PSTN Fallback feature has the following
>> restrictions:
>>
>> *When detecting network congestion, the PSTN
>> fallback feature does
>> nothing to the existing call. It affects only
>> subsequent calls.
>>
>> *Only a single ICPIF/delay-loss value is allowed per
>> system.
>>
>> *A small additional call setup delay can be expected
>> for the first call
>> to a new IP destination.
>>
>> *PSTN fallback is supported for H.323 VoIP calls
>> only.
>>
>>
>>
>>
>>
>>
>>
>> From: Alex [mailto:ecralar at hotmail.com]
>> Sent: Wednesday, February 27, 2008 11:32 AM
>> To: Todd Simons; cisco-voip at puck.nether.net
>> Subject: Re: [cisco-voip] VoIP Failover Path
>>
>>
>>
>> My memory can be rusty but I think you can do think
>> using link-endpoint
>> addresses as "session targets", also look into "PSTN
>> fallback" for
>> failover on bad quality.
>>
>> Rgds
>>
>> Alex
>>
>> ----- Original Message ----- 
>>
>> From: Todd Simons <mailto:tsimons at delphi-tech.com>
>>
>>
>> To: cisco-voip at puck.nether.net
>>
>> Sent: Wednesday, February 27, 2008 3:36 PM
>>
>> Subject: [cisco-voip] VoIP Failover Path
>>
>>
>>
>> All-
>>
>> We have two Cisco2801 routers that can connect to
>> each other
>> serial to serial, or Ethernet to Ethernet:
>>
>>
>>
>>   /--S0--{path1}--S0--\
>>
>> GW1                   GW2
>>
>>   \--E0--{path2}--E0--/
>>
>>
>>
>> Currently PATH1 is our default path.  How can we
>> setup PATH2 for
>> a backup path for VoIP dialpeers?  I've investigated
>> the preference
>> value, but with the preference, what triggers the
>> failover?
>>
>>
>>
>> Will/Can active Calls be passed between PATH1 and
>> PATH2 without
>> dropping if PATH1 goes down?
>>
>>
>>
>> If call quality on PATH1 is bad, will PATH2 be
>> used, will/can
>> active calls be moved??
>>
>>
>>
>> Thanks!
>>
>> ~Todd
>>
>>
>> ## Scanned by Delphi Technology, Inc. ##
>>
>>
>> ________________________________
>>
>>
>> _______________________________________________
>> cisco-voip mailing list
>> cisco-voip at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>
>>
>> ## Scanned by Delphi Technology, Inc. ##>
> _______________________________________________
>> cisco-voip mailing list
>> cisco-voip at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>
>
>
>
> 
> ____________________________________________________________________________________
> Be a better friend, newshound, and
> know-it-all with Yahoo! Mobile.  Try it now. 
> http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
>
>