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Which of the following statements is correct regarding …

Which of the following statements is correct regarding the default call protocol on a Cisco TelePresence SX20
Quick Set?

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A.
The default call protocol is always H.323 and cannot be modified.

B.
You can modify the default call protocol only by using the GUI.

C.
You can modify the default call protocol by issuing the Conference 1 DefaultCall Protocol: H323 command.

D.
You can modify the default call protocol by issuing the xConfiguration Conference 1 DefaultCallProtocol:
H323 command.

Explanation:
You can modify the default call protocol on a Cisco TelePresence SX20 Quick Set by issuing the Conference 1
DefaultCall Protocol: H323 command. Alternatively, you can modify the default call protocol by selecting
Configuration > System Configuration > Conference and configuring the Default Call Protocol field from the
graphical user interface (GUI) web interface on a Cisco SX20 Quick Set. You can select Auto, H.323, Session
Initiation Protocol (SIP), or H.320. If Auto is selected and multiple protocols are available, the device will choose
SIP, then H.323, then H.320. If the system cannot register or the call protocol is not enabled, the device will
choose H.323.
You cannot modify the default call protocol on a Cisco TelePresence SX20 Quick Set by issuing the
xConfiguration Conference 1 DefaultCall Protocol: H323 command. However, you can modify the default call
protocol on a C-series codec by issuing the xConfiguration Conference 1 DefaultCall Protocol: H323 command.

Cisco: Administrator guide for Cisco TelePresence SX20 Quick Set: Conference settings (PDF)


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