Refer to the exhibit.
Assume that NANP is being used and 9 is used for PSTN access code Long distance national calls are preceded with 1.
How should the HQ Cisco Unified Communications Manager be configured for calls to 3XXX to be sent to the gatekeeper at 10.1.6.1 with PSTN backups?
A.
Configure a route pattern for 3XXX. Assign this route pattern to a route list that points to two route groups The first route group contains the H.225 trunk. The second route group contains the MGCP gateway with prefix digits 1 408555 for the outgoing called number.
B.
Configure a route pattern for 1#3XXX. Assign this route pattern to a route list that points to a route group that lists the H.225 trunk as first choice and the MGCP gateway as a second choice.
C.
Configure a route pattern for 4085543XXX. Assign this route pattern to a route list that points to two route groups. The first route group contains the H.226 trunk. The second route group contains MGCP gateway.
D.
Configure a route pattern for 3XXX. Assign this route pattern to a route list that points to two route groups The first route group contains the H.225 trunk. The second route group contains MGCP gateway with prefix digits 91 408554 for the called number.
Explanation:
Ok, check 3-100 3-101.
Note:
For a PSTN backup, you need to perform digit manipulation in such a way that the calling number and (more importantly) the called number are transformed to always suit the needs of the device that is actually used. This transformation can be done at the route list, where digit manipulation can be configured per route group. In the example, the called number 9 1 511 555-1234 has to be changed to a 10-digit number for the H.225 trunk, because the
gatekeeper is configured with area code prefixes without the long distance 1. The called number must also be changed to an 11-digit number if rerouting the call to the PSTN gateway is necessary. A better solution would be using global transformations at the egress devices (H.225 trunk and PSTN gateways). In a large multisite environment or in an international deployment, the implementation of globalized call routing would be the best solution.
The answer according to Test Kin is D. BUT how can D be the answer as it is prefixing the 9 access code which should not be sent to the PSTN. The PSTN will not know how to route the 914085543XXX
A is the correct decision in my eyes. This way the call is sent to the PSTN as 14085543XXX which in North America is routable
Rick