[cisco-voip] Sip trunking and DR

[Matthew Richards]

Hi

I wonder if anyone can help, I'm in the process of speccing out an upgrade
of our system and am looking at DR and how we can manage this,
specifically in terms of off site Voip kit and how we manage calls going
to this site in the event of our main site not being contactable, we use a
geographic number so want to keep this and we are currently using ISDN to
connect to BT. The main issue I have is over ISDN, if we choose to divert
calls our range of numbers diverts down to 1 number with no direct dial
functionality.

My questions are:

Is anyone using Sip trunking from a SIP provider for their lines instead
of ISDN, and what is your setup (do you have a dedicated pipe for voice
traffic, etc)

If you are using ISDN lines how do you do DR and failover if the main site
is not contactable?

Are you doing something else?

Thanks in advance

Matt Richards