[cisco-voip] AAR vs. Route Lists

[Kelemen Zoltan]

So a RL won't fall back to the second route group if the network is 
congested (that basically should send a busy as well, not?)?

Example:
RouteList IP_PSTN
 RG1: IPTrunk
 RG2: PSTTrunk

if RG1 is congested (Locations bandwidth exceeded) it won't go over to RG2?

Zoltan

Justin Steinberg wrote:
> AAR works in conjunction with CCM Locations bandwidth.  Think two IP
> phones located at two remote sites that attempt to dial each other and
> exceed the Locations bandwidth.  AAR is invoked and the call is
> rerouted out a local PSTN gateway.
>
> http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_administration_guide_chapter09186a00803edabe.html#wp1056007
>
> On 10/2/07, Ahmed Elnagar <aelnagar at act-eg.com> wrote:
>   
>>
>>
>> Hello;
>>
>>
>>
>> I never use the AAR feature before, but something came to my mind. Maybe the
>> AAR can achieve the following (that RL cannot):
>>
>>
>>
>> When the call is rejected due to not enough bandwidth on the WAN link don't
>> send the call through the PSTN.
>>
>> When the call is rejected due to WAN failure send the call through the PSTN.
>>
>>
>>
>> I am not sure of it, I am just assuming.
>>
>>
>>
>>
>> -----Original Message-----
>>  From: cisco-voip-bounces at puck.nether.net
>> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of
>> Kelemen Zoltan
>>  Sent: Tuesday, October 02, 2007 11:30 AM
>>  To: Cisco VoIP
>>  Subject: [cisco-voip] AAR vs. Route Lists
>>
>>
>>
>> Hi,
>>
>>
>>
>> this may be a noob question to some of you, but there's something I
>>
>> don't quite understand:
>>
>>  don't Route Lists provide the same (or rather - similar) functionality
>>
>> as AAR? If not (and I suppose not) what's the difference?
>>
>>
>>
>> Case in point:
>>
>>   We have a client with three CCM clusters, all connected through ICTs.
>>
>> We haven't used AAR so far, but the calls are routed through Route
>>
>> Lists: the trunk is the first route group, but if that fails, calls are
>>
>> redirected to the PSTN route group with appropriate transform masks for
>>
>> called and calling numbers.
>>
>>
>>
>> If the IP trunk is congested, shouldn't the calls be rerouted to the
>>
>> PSTN anyway? (even though AAR is not set)
>>
>>
>>
>> thanks,
>>
>>   Zoltan
>>
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