On Thu, Aug 13, 2009 at 6:25 AM, Shashi Dookhee <sdook...@fortify.com>wrote:
> Hi all, > > I was looking to build a SIP-to-PRI gateway using Asterisk (as in my other > post), but there is also an alternative of using a Cisco router with > something like an NM-HDV module with a T1 VIC module and DSP channel banks. > > The question is, would it be more reliable to offload all > dahdi/zaptel/libpri type stuff to a dedicated gateway device (Asterisk or > Cisco) and have the Asterisk PBX only process SIP/IAX? What prompted all > this was terrible call quality/dropped calls over our PRI (which currently > has a Wildcard TE207P PCI card) and after two weeks of searching I think > I've finally found the issue today (Serial ATA vs Auto mode in the BIOS, > would you believe which leads us to believe that offloading duties would be > very beneficial performance-wise!). > > I can think of the gateway allowing us to have multiple PBX's to serve our > calls more easily, maybe making it easier to failover PRI's too, etc... > Although we do have an ADTRAN Atlas that allows us to split call volume by > DIDs if we wanted to (right now we only have one Asterisk PBX, one > electronic FAX server and a couple of standalone FXO devices - all sharing > our PRI by the ADTRAN)... > > Any comments appreciated. > > Thanks! > > S. > I try to dedicate a box (sometimes HA heartbeat or just a decent server like the HP DL360 with dual power supplies and RAID) to a certain task. The litmus test is when that task is mission critical and can logically be drawn out on a whiteboard. PRI<->SIP is pretty intensive and obviously mission critical and at least to me can sit on it's own little square on the whiteboard. Budget wise, if possible, I would go with two HP DL360s with dual power supplies, RAID and a Redfone device or at the least two Sangoma cards, one for cold spare (unless Digium now has a lifetime warranty that I am unaware of). -- Thanks, Steve Totaro +18887771888 (Toll Free) +12409381212 (Cell) +12024369784 (Skype)
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