Using Technology Prefixes for Redundancy

Using Technology Prefixes for Redundancy
Using technology prefixes, you can configure more than one remote gatekeeper
to which the local gatekeeper can use for placing calls. As shown in Figure 5.6,
you can install two gateways that both place calls to the PSTN (gw1 and gw2).
Calls to the PSTN can be defined as technology prefix 1#. For redundancy, these
gateways can register using technology prefix 1# with two different gatekeepers,
gk1 and gk2. Now both gatekeepers, gk1 and gk2, can route calls to the PSTN.
Gk1 and gk2 can be in the same zone or different zones. Gatekeeper 3, gk3, can
be defined to use gk1 and gk2 to place calls to the PSTN (via technology prefix
1#).This provides redundancy for both the gatekeepers and the gateways.