On Mon, 6 Jul 2009, Jonathan Thurman wrote:
We are currently moving away from a wide-spread Cisco CallManager deployment
to Asterisk. For many of our small sites we have the routers configured for
what Cisco calls SRST so if we have a WAN failure, the router acts as a SCCP
registrar. We are converting to SIP, and from what I can tell Cisco wants a
license for each router to run SRST over SIP...
So my question to the group is: What are you doing for survivability in
these small (6-30 phone) sites? I would like to avoid deploying a lot of
servers if at all possible. The requirements would be a simple, easy to
manage device for the phones to register to in case of WAN failure with 1 or
2 POTS lines attached (also used for 911 calls from that site). Thanks for
any suggestions!
Deploy a lot of small asterisk based appliances...
This way you can completely decentralise your setup and give each office
it's own autonomous system, only needing the WAN links for inter-site
calls (and maybe your backhaul to the PSTN)
30 phones will trivially work from a diskless, fanless, processor, so no
need for anything too clever. If building them yourselves the cost per
site ought to be under $600 for the hardware (Under £400 where I am, so
apply conversion rate) you could use one of the pre-built packages for
this - pbxinaflash, or buy something like an Atcom unit, etc.
Gordon
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