A phone has a device CSS that includes the partitions phones and PSTN. This provides access
for all internal phones and external calls. The first line on this phone has a CSS that includes the
partitions phones, 911, and local. If a call is placed to a long-distance number, will the call be
completed and why or why not?

A.
No, because the CSS on the line does not include the partition for long-distance.

B.
No, because when there is a CSS on both the line and the device, the line CSS takes
precedence.

C.
Yes, because the line CSS also includes the <None> partition and this will be used to match
the long-distance call.

D.
Yes, because the call will use the device CSS

Explanation:
Link :
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_5_1/ccmsys/a03ptcss.html#wp1
020336
Cisco Unified Communications Manager System Guide Release 8.5(1), page-173.