Which filter can be used to block all 900 calls?
A.
@ where area-code = 9
B.
@ where area-code = 900
C.
@ where area-code exists
D.
@ where national number = 900
Explanation:
Understanding and Troubleshooting Call Routing and Dial Pattern Problems with Cisco CallManager
Cisco Document ID: 13920
Blocking acess to certain area codes and number is accomplished with a separate Partition for each pattern that should be denied access (such as 9.@ where AREA-CODE=900). Because this is a closer match than a simple 9.@ where AREA-CODE EXISTS, and the Route Pattern is configured to block (instead of route) anything that matches this Pattern, the filtering works. http://www.cisco.com/en/US/partner/products/sw/voicesw/ps556/products_tech_note09186a00800949f0.shtml