Another option instead of 2 servers dedicated as PRI gateways is to use AudioCodes Mediant 1000 or 2000 gateways. Either of them will also failover to a backup proxy if the primary proxy (server) is offline. Probably much cheaper than the kick ass box you plan to build + PRI
I’m not affiliated either, but we do place them in our 911 call centers. They have analog gateways as well for FXO & FXS devices.
[mailto:email@example.com] On Behalf Of Steve Totaro Sent: Friday, June 14, 2013 3:53 PM
To: Asterisk Users Mailing List – Non-Commercial Discussion Subject: Re: [asterisk-users] I need a second opinion on a new phone systemdeployment
might be a good place look and see if other ideas pop up. They have good products. I am not affiliated with them, just a happy user on a couple of deployments.