As a voice engineer, which two recommendations do you make to your company to optimize Cisco Unified Communications Manager configuration to reduce the number of toll fraud incidents? (Choose two.)

As a voice engineer, which two recommendations do you make to your company to optimize Cisco Unified Communications Manager configuration to reduce the number of toll fraud incidents? (Choose two.)
A . Inbounds CSS on any gateway typically should have access to internal destinations only and not PSTN destinations.
B . Classify all route patterns as on-net and prohibit on-net to on-net call transfers in Cisco Unified CM service parameters.
C . Classify all route patterns as on-net or off-net and prohibit off-net call transfers in Cisco Unified CM Service parameters.
D . Inbound CSS on any gateway typically should have access to internal destinations and PSTN destinations.
E . Classify all route pattern as off-net and prohibit off-net to off-net call transfers in Cisco Unified CM service parameters.

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Answer: A,E