[cisco-voip] IP overhead paging: likes and dislikes? SIP and survivability...

[Robert Kulagowski]

So, what's the consensus out there?  Greenfield project, so no requirement 
for old-school analog (unless that's what we want)

I've looked at Cyberdata, and there appear to be others out there.

Right now if the site goes into SRST, then the ATA's just register and 
overhead paging should still work.  But I'm concerned that with a SIP 
solution, I may lose that.  According to the Cisco docs that I found here
http://www.cisco.com/en/US/products/sw/voicesw/ps2169/products_configuration_guide_chapter09186a008060c355.html

the endpoint should support dual-registration for survivability reasons. 
I've asked Cyberdata tech support if their speaker has that capability, no 
response yet.

I haven't investigated if it's possible for the IP speaker to register to 
the router right from the get-go because I'm not sure that the router will 
allow SIP connections like that if it's not in SRST mode.

Thanks for any insight...