If the administered source group related alternate routing destination number contains
only a trunk access into public network and the value of parameter EXTNO = 0, neither
an
alternate destination nor the called subscriber in its AP can be reached.
A
supplementation is necessary in this situation and a value of parameter EXTNO = length
of called subscriber must be set.
The implausibility of the source group related
alternate routing destination number for this routing scenario cannot be detected
by
the syntax checks of AMO APRT and will only be verified at time of usage.
The
result is, that this alternate routing destination number can not be used for routing
type APE.