Which value should be entered into the "Source" eld to prevent toll fraud regardless at origin of the call?

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" eld to prevent toll fraud regardless at origin of the call?
A . Traversal Zone
B . Any
C . Neighbor Zone
D . All

View Answer

Answer: D