Avaya B5800 User Manual Page 48

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Measuring channel usage
The IP Office System Status Application can be used to display voice compression channel
usage. Within the Resources section it displays the number of channels in use. It also displays
how often there have been insufficient channels available and the last time such an event
occurred.
For the VCM cards, the level of channel usage is also indicated by the LEDs (1 to 8) on the
front of the VCM card.
Emergency and power failure ports
B5800 Branch Gateway systems can provide 2 types of analog extension power failure ports
as described in the following table.
Type Description Provided By:
Switching power failure
ports
During normal B5800 Branch
Gateway operation these ports
can be used for normal analog
phone connection.
During power failure the port is
directly connected to an analog
trunk port.
Analog phone 8 card
When an analog phone 8
base card is fitted with an
analog trunk daughter card,
during power failure
extension port 8 is connected
to analog trunk port 12.
ATM combination card
On this card, during power
failure, extension port 8 is
connected to analog trunk
port 12.
Emergency only power
failure ports
During normal B5800 Branch
Gateway operation these ports
cannot be used.
During power failure the port is
directly connected to an analog
trunk port.
Analog trunk daughter
card
Regardless of the card
hosting it, during power
failure pins 4 and 5 of port 12
are connected to pins 7 and
8.
In all cases these only work with loop-start analog trunks. Any phones connected to these ports
should be clearly labeled as power fail extensions in accordance with the appropriate national
and local regulatory requirements.
Installation requirements
48 Implementing B5800 Branch Gateway for a CS 1000 Configuration October 2012
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