210-065 · Question #55
Which two of these can cause registration problems for a Cisco TelePresence Codec C40 endpoint running in H.323 mode? (Choose two.)
The correct answer is A. The IP default gateway address is incorrect for the endpoint. D. The E.164 H323Alias has not been configured on the endpoint. H.323 registration on a Cisco TelePresence Codec C40 to a VCS requires correct network routing and a valid H.323 alias configured on the endpoint.
Question
Which two of these can cause registration problems for a Cisco TelePresence Codec C40 endpoint running in H.323 mode? (Choose two.)
Options
- AThe IP default gateway address is incorrect for the endpoint.
- BThe H.323 license stack is not added to the endpoint.
- CThe MAC address for the endpoint has not been added to the Cisco TelePresence VCS.
- DThe E.164 H323Alias has not been configured on the endpoint.
- EThe URI address has not been configured on the endpoint.
How the community answered
(47 responses)- A77% (36)
- B4% (2)
- C6% (3)
- E13% (6)
Why each option
H.323 registration on a Cisco TelePresence Codec C40 to a VCS requires correct network routing and a valid H.323 alias configured on the endpoint.
An incorrect IP default gateway prevents the endpoint from routing packets to a VCS that resides outside its local subnet, making network reachability impossible and blocking the H.323 registration request before it can even reach the gatekeeper.
Cisco TelePresence C-Series codecs do not require a separately installed H.323 license stack; H.323 protocol support is included in the firmware by default.
The Cisco TelePresence VCS does not require MAC address pre-registration for H.323 endpoints; MAC-based allowlisting is not a standard H.323 registration control mechanism on VCS.
In H.323, an endpoint must have at least one H.323 alias such as an E.164 number configured to present a valid registration request to the VCS or gatekeeper; without it, the RRQ (Registration Request) message lacks required alias information and is rejected.
A URI (SIP URI) is used for SIP registration, not H.323; its absence has no effect on an H.323 registration attempt with the VCS.
Concept tested: H.323 endpoint registration requirements on Cisco VCS
Source: https://www.cisco.com/c/en/us/td/docs/telepresence/infrastructure/vcs/config_guide/x8-6/vcs-administrator-guide-x8-6/H323.html
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