[Serusers] SER Proxy and SIP Redirect

[Marian Dumitru]

Hi Erin

So, your problem sounds like: you have these 155,000 NPA/NXX prefixes 
and for each of them a GW or set of GWs to route through. Right?

If so, there are 2 solution:

1) use the SIP redirector which will generate a SIP redirect to the 
GW(s) to be used. In this case, from SER script, mark the INVITE before 
sending it to the Redirector and when the redirect comes (looking to the 
mark you will know for sure who generated the redirect and it's not 
coming from another SIP entity) use the future SER UAC redirection 
feature and send the INVITE the GW mentioned in contact.

2) integrate the redirection logic into SER (to avoid this redirect 
mechanism) - not sure what kind of logic the Redirector implements, but 
if it's about prefixes translating into GW address(es), you can use 
something similar to PDT or LCR modules.

I hope I brought some light on to the problem.

Best regards,
Marian


Eric Dean wrote:
> 
> Ok..let me be a bit more clear.
> 
> We have a SIP redirector...which is just a database bolted onto libsip.  
> This database has an entire LERG per client...which means 155,000 
> NPA/NXX combinations....   There is no way to manage this in ser.cfg 
> routing...therefore we created it.
> 
> However, I simply need a proxy that can query our database and route the 
> call on behalf of the UA to the corresponding gateway/interface.
> 
> Marian Dumitru wrote:
> 
>> Hi Eric,
>>
>> It's just a matter of SER configuration. The service provider may 
>> decide on whatever criteria he likes (upstream entity, downstream UA, 
>> ACLs, etc) which redirect replies are filtered and processed on server 
>> and which ones are forwarded to the UAC.
>>
>> Best regards,
>> Marian
>>
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