[Asterisk-Dev] Announcing chan_ss7, a GPL'ed SS7 channel driver

[Nick B.]

Has there been any progres on cluster mode?
	Nick
On Tue, Oct 25, 2005 at 01:13:28PM +0200, Kristian Nielsen wrote:
> Over the last few months, Sifira A/S has been implementing an SS7
> channel driver for Asterisk, called chan_ss7. The channel driver works
> with Digium E1 cards. The licence for the channel driver is GPL.
> 
> We are now ready to release the first public version of the code. The
> purpose of this release is mainly to let people know what we are doing,
> and to allow other developers with an interest in an Open Source SS7
> driver to join forces with us.
> 
> I would encourage anyone interested in this, who has the necessary SS7
> and Asterisk skills and access to SS7 equipment, to try the code and to
> send us a note about their interest. The source may be downloaded from
> 
>     http://www.sifira.com/chan-ss7/
> 
> To compile it, a recent CVS HEAD version of Asterisk is needed. Success
> or problems can be reported to
> 
>     chan-ss7 at sifira.dk
> 
> The current state of the code supports voice curcuits on one or more E1
> links with a single timeslot 16 signalling link. Incoming and outgoing
> calls are working. There's a good framework in place for handling the
> MTP2/3 and ISUP layers. It should be fairly simple to add any missing
> stuff to this, bit by bit, as the need arises.
> 
> Our plan is to extend chan_ulv to support a cluster mode, where two
> Asterisk boxes running chan_ulv shares a single SS7 point code, with one
> link on each box making a redundant link set. The two instances of
> chan_ulv will then do heartbeat monitoring of each other, so that if one
> box goes down the other can do automatic MTP3 failover and block the
> dead voice curcuits on the ISUP level, thus eliminating single point of
> failure for the system. However, none of this cluster mode has been
> implemented yet.
> 
>  - Kristian.
> 
> -- 
> Kristian Nielsen   kn at sifira.dk
> Development Manager, Sifira A/S
> 
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