Specifications

120 Hardware Description and Reference for Avaya Communication Manager
Front panel
Table 9: Fixed ports and buttons on the G250 front panel on page 120 describes the functions
of the fixed ports and buttons on the G250 front panel.
Table 9: Fixed ports and buttons on the G250 front panel
Port Description
TRUNK Four analog trunk ports (G250-Analog Media
Gateway, G250-DCP Media Gateway) or one
analog trunk port (G250-BRI Media Gateway,
G250-DS1 Media Gateway). These fixed trunk
ports support loop-start, DIOD (for Japan only)
trunks and caller ID detection.
LINE Two analog telephone ports.
An analog relay provides Emergency Transfer
Relay (ETR) feature.
For the G250-Analog and G250-DCP, the relay is
between TRUNK port 3/4 and LINE port 3/5.
For the G250-BRI and G250-DS1, the relay is
between TRUNK port 3/1 and LINE port 3/2.
Also used for incoming analog DID trunks.
The G250 integrated analog line ports support
three ringer loads, which is the ringer equivalency
number (REN), for the following loop lengths:
- 20,000 feet (6096 meters) over 0.65 mm
(.025 in.) wire (22 AWG)
- 16,000 feet (4877 meters) over 0.5 mm
(.02 in.) wire (24 AWG)
- 10,000 feet (3048 meters) over 0.4 mm
(.016 in.) wire (26 AWG)
At .1 or less REN ringer loads, the supported
loop length is 20,000 feet (6096 meters) at
22, 24, and 26 AWG.
ISDN BRI TRUNK
(G250-BRI Media
Gateway)
Two 4 wire S/T ISDN BRI (Basic Rate Interface)
2B+D access ports with RJ-45 jacks. Each port
interfaces to the central office at the ISDN T
reference point. The ISDN BRI trunk ports do not
support:
● BRI stations
● Combining both B channels together to form
a 128-kbps channel
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