| SRG is a very cool technology.
In a nutshell ... the SRG resides at a remote location. The phones, though physically at that location, logically reside on the CS1000 (Main Office or MO). This connection is established via the WAN. If the WAN fails, the sets co-located with the SRG register to the SRG so the site still has telephony. This is known as "Local" or "Suvivable" mode. Once the WAN is restored, the sets redirect back to the MO and operate in "Normal" mode.
Now here's the good stuff!
If you network was properly designed and is large enough, you can take advantage of the trunks connected to each SRG for Toll-Bypass.
If you MO is in New York, and you have an SRG in Los Angeles, you can ride the IP to LA and jump off a trunk there as a local call ... No LD Charges! The more sites you have, the more you save in LD.
Very cool stuff.
Of course this can also be accomplished in any network that has IP trunking between systems. But, the SRG not only provides Toll-Bypass, but also allows users in Normal mode full feature CS1000 sets, and survivability in the event of WAN failures.
Hope this helps!
-SD- |