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DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
ISDN Voice Terminals
17-48The ISDN 8520T Voice/Data Terminal
17
Power Requirements
Auxiliary Power Supply
The 8520T needs auxiliary power from an auxiliary power supply. Recommended
power supplies are the 1151A1 and 1151A2 with Battery Holdover and MSP-1
(local) Power Supplies and the 1145A and 1145B1 Bulk Power Supplies.
Terminating Resistor
The terminating resistor setting must be set by either a service representative or
the system administrator.
■ The terminating resistor setting should be set to OUT when the voice/data
terminal is in a point-to-point configuration and the terminating resistor is in
the closet.
■ The terminating resistor setting on the terminal should be set to IN when
the voice/data terminal is in a point-to-point configuration and the
terminating resistor is
not
in the closet.
■ When terminals are part of a multipoint configuration and the terminating
resistor is in the closet, all sets should be set to OUT.
■ When the terminating resistor is
not
in the closet and the terminals are part
of a multipoint configuration, only one of the sets in this configuration needs
to be set to IN. All the rest of the sets in this configuration should be set to
OUT.
To change the terminating resistor setting, do the following:
1. Press and then
.
2. Dial the numbers “87” (TR).
3. The display screen shows you the current terminating resistor setting (IN or
OUT). Use the softkeys to toggle between the two settings, whichever is
correct for that terminal.
4. When the correct setting is shown on the display screen, press the softkey
beside Done.
Switch Administration
An 8520T voice/data terminal connected to a DEFINITY G2, G3i, G3r, or to a
DEFINITY ECS, should be aliased as a 7507 with data.
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