[Serusers] Failover PSTN Gateways

[Adrian Georgescu]

E164 normalization I was referring into the document to has (almost) 
nothing to do with ENUM. It has to do with a consistent table with 
destination prefixes in PSTN (country codes e.g. 49171 geman mobile/ 
network numbers to make it more clear). The destinations have names and 
prices you might link to/from external systems. The normalization means 
all PSTN calls will be brought to a normalized form according to E164 
standard. If you dial extra 9 before pst numbers, local numbers without 
country codes or not or you send to the gateway the country prefix or 
add two zero is totally up to each configuration at each provider. LCR 
makes sure it looks up the destination from one consistent table which 
matches what Telco today are used to in building a dest/cost database.

Adrian

On Sep 2, 2004, at 12:32 PM, Jan Janak wrote:

> One more thing, I like the E.164 normalization, I would, however,
> recommend to make it part of the enum module, instead of the LCR 
> module,
> if you plan to contribute it into the main source tree, of course.
>
>   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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