> Nope, it's not. Can you name a phone prefix routing protocol?
Ehm, SS7 ;).
One of the functions provided for in the SS7 network is
called Global Title Translation (GTT). The SCCP, in this
case call it the switch, has the ability to perform minimal
routing using GTT. GTT frees the STP, let's call that the
"edge router" from being burdended with lcoations for all
possible end nodes. You could say it's like ASN information.
It enables the ss7 to pass on small messages that
the STP's understand and are able to route on to the next
destination in the path until it reaches the final STP and
returns an answer in the same fashion. It's a combination
of dynamic and static information used to find destinations.
[ Long discussion on GTT fundamentals avoided - I
recommend "SS7 Signalling - 2nd Edition" for more
information on GTT et. al. ]
A good example of the integration of SS7 into
*IP* routing is to be found in the convergence of SS7
stacks into dial gear which enables the IP network
to signal the SS7 network and perform optimized
call aggregation. What I mean by this is that
instead of dedicating a box of 672 ports to one
customer, many customers can share one box and
bypass the SCCP (TDM switching component) and talk
directly to the PSTN. The aggregation model is much
finer in this respect and the utilization of hardware
is more cost effective.
Kinda old stuff actually circa 1998. So. Yes. Sort of. SS7
is a routing protocol for all intents and purposes.
NotSoOb: Verisign runs one of the largest facilities based
SS7 networks in the world.