Which of the following actions can you perform on a Cisco VCS to allow H.323 endpoints to initiate a Multiway
conference? (Choose two.)

A.
Navigate to Applications > Conference Factory, and change the Mode field to On.

B.
Navigate to Configuration > Protocols > SIP, and change the SIP mode field to Off.

C.
Navigate to Configuration > Protocols > Internetworking, and set the H.323 <-> SIP internetworking mode
option to Off.

D.
Navigate to Configuration > Protocols > Internetworking, and set the H.323 <-> SIP internetworking mode
option to On.

E.
Navigate to Configuration > Protocols > Internetworking, and set the H.323 <-> SIP internetworking mode
option to Registered only.

Explanation:
To allow H.323 endpoints to initiate a Multiway conference, you can navigate on a Cisco TelePresence Video
Communication Server (VCS) to Configuration > Protocols > Internetworking and set the H.323 <-> SIP
internetworking mode option to Registered only or On. When H.323 <-> SIP internetworking mode is set to Off,
the Cisco VCS will not act as a SIP-H.323 gateway. When the H.323 <-> SIP internetworking mode option is set
to On, the Cisco VCS will act as a Session Initiation Protocol (SIP)H.323 gateway regardless of the registration
status of the endpoints. When the H.323 <-> SIP internetworking mode option is set to Registered Only, the
Cisco VCS will act as a SIP-H.323 gateway only if at least one of the endpoints is locally registered.
Either MultiSite or Multiway can be used for ad-hoc conferences, which are also called on-demand
conferences. MultiSite uses a phone’s native multipoint control unit (MCU) functionality and allows up to four
participants in a conference. However, MultiSite requires that an option key be installed on each endpoint.
Multiway allows many more participants but requires a Cisco VCS and a Cisco TelePresence MCU to handle
the conference. In addition, an option key is not required for Multiway. MultiSite and Multiway are mutually
exclusive; if Multiway is used on your network, you should disable MultiSite on the endpoints.
Conference Factory allows you to configure Multiway on Cisco VCS. Navigating to Applications > Conference
Factory and changing the Mode field to On will enable the Conference Factory application. However, it will not
allow H.323 endpoints to initiate a Multiway conference. By default, only SIP endpoints can initiate a Multiway
conference.
Navigating to Configuration > Protocols > SIP and changing the SIP mode field to Off will not allow H.323
endpoints to initiate a Multiway conference. In fact, the SIP mode field must be set to On in order for
Conference Factory to function.

Cisco: Cisco TelePresence Video Communication Server, Administrator Guide: Configuring Conference
Factory (PDF)
Cisco: Cisco TelePresence Multiway, Deployment Guide: VCS with H.323 endpoints initiating a Multiwayconference (PDF)