Refer to the exhibit.

The H.323 Gateway is showing status “unknown”. Which statement is true?

A.
The gateway must be reset in Cisco Unified Communications Manager.

B.
The no gateway command followed by the gateway command must be issued in Cisco IOS.

C.
The mgcp commands must be removed.

D.
H.23 gateways do not register with Cisco Unified Communications Manager H.323 gateways
always show status “Unknown”.

E.
VUAN 1 20 may be down and so the H.323 gateway appears offline to the Cisco Unified
Communications Manager

Explanation:
After a gateway is registered with Cisco Unified Communications Manager, gateway registration
status may display in Cisco Unified Communications Manager Administration as unknown.
Link:
http://www.cisco.com/en/US/docs/voice_ip_comm/cucmbe/admin/8_6_1/ccmcfg/b06gtway.html