[asterisk-ss7] Single Point Code across Multiple * Boxes.

[Matthew Fredrickson]

Attila Domjan wrote:
> Don't forget the correct handling of the circuit group messages, may
> have to split the GRS, CGB, etc. and concat the answers for them (GRA,
> CGBA...)

Yeah, that's probably going to be something we'll have to deal with.  A 
lot of switches I have seen don't cross T1/E1 boundaries on group 
messages, but Asterisk's SS7 implementation has situations where it does 
cross T1/E1 boundaries on group messages.

For A links, I think it won't be a problem though because the CICs are 
going to line up correctly.  For F links (signaling and bearers on same 
T1/E1) you'll have problems with lining up group messages with T1/E1 
boundaries.

> When I have time I'll test your new stuff.

It's actually in the svn branches I posted earlier which contain 
Domjan's changes... I'm going to have to merge those into trunk anyways, 
I just haven't done it yet, so eventually they'll be in trunk.

http://svn.digium.com/svn/libss7/branches/mattf/bug13495

http://svn.digium.com/svn/asterisk/branches/mattf/bug13495

Matthew Fredrickson
Digium, Inc.

> 
> Regards,
> Attila
> 
>> Well, to have a fully redundant setup, you would have separate boxes 
>> terminating each signaling link.  These routing machines can masquerade 
>> ISUP traffic over to other machines via IP protocol based links.  Each 
>> of these IP connected boxes has an IP link to each box with a physical 
>> signaling link.  If a machine with a physical link goes down, it reports 
>> it to the IP links that are hooked up to it and the machines using those 
>> IP links use their alternate IP links instead of that link, providing 
>> for redundancy in times of link failure.
>>
>> There are going to be other problems to think about as well, but I think 
>> that the basic logic is sound and will work.
>>
>> I actually just got masqueraded ISUP messages passing correctly back and 
>> forth over IP, but I still have some technical hurdles as far as what to 
>> do as IP links go in and out of service.  This list will definitely know 
>> what I have something I'm interested in testing :-)
>>
>> Matthew Fredrickson
>> Digium, Inc.
>>
>>
>>
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