A collaboration engineer is implementing toll fraud prevention on Cisco Unity Connection. The engineer wants to block calls to 9005551234 for any…

This option blocks calls to 9005551234 for any caller that reaches the Caller System Transfer

conversation, which is one of the ways that Cisco Unity Connection can transfer calls outside. The

default Transfer Restriction Table is associated with the default System Call Handler class of service,

which is used by the Caller System Transfer conversation. Blocking 900 on this table prevents toll

fraud by restricting calls to any number that starts with 900, which are usually premium-rate

numbers. Reference:

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/10x/security/guide/10xcucsec

x/10xcucsec020.html

https://www.cisco.com/c/en/us/support/docs/unified-communications/unity-connection/119337technote-cuc-00.html