3Com VCX v7111 Installation Manual page 47

RTP Active indicates an active RTP stream.
Phone Not Connected (FXO only) indicates that no analog line is connected to this port
(applicable only to MGCP).
To monitor the details of a channel, follow these steps:
In the Channel Status screen, click the numbered icon of the specific channel whose
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detailed status you need to check/monitor; the channel-specific Channel Status screen
appears.
Click the submenu links to check/view a specific channel's parameter settings.
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3Com VCX V7111 Fast Track Installation Guide 47