Refer to the exhibit. An ISDN gateway is registered to Expressway-C with a prefix of 9 and/or it has a neighbor zone specified that routes calls starting with a 9.
Which value should be entered into the "Source" field to prevent toll fraud regardless at origin of the call?
A. Traversal Zone
B. Any
C. Neighbor Zone
D. All
There is no “all” option. The answer is B. “any”