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DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
ISDN Voice Terminals
17-37The ISDN 8510 Voice/Data Terminal
17
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 Resistors
The terminating resistor jumpers are located on the upper left side on the bottom
of the terminal. Above the pins, on the plastic housing, you will see the label
TERM RESISTOR and a diagram of the correct settings.
These jumpers enable (ON) or bypass (OFF) the terminating resistor. The set is
shipped with the jumpers in the OFF position bypassing the terminating resistor.
You must verify that the jumper settings are set correctly for your configuration.
NOTE:
The terminating resistor jumpers must be set
only
by qualified service
personnel.
■ The terminating resistor jumpers must be set to OFF when the set is in a
point-to-point configuration and the terminating resistor is in the closet or a
440A4 is connected on the line. When set to OFF, each of the two
terminating resistor jumpers covers the two top pins in each set. (The
bottom pin in each set is left uncovered.)
■ The terminating resistor jumpers must be set to ON when the set is in a
point-to-point configuration and the terminating resistor is
not
in the closet
or a 440A4 is
not
connected to the line. When set to ON, each of the two
terminating resistor jumpers covers the two lower pins in each set. (The top
pin in each set is left uncovered.)
■ The terminating resistor jumpers must be set to OFF when the set is in a
multipoint configuration and the terminating resistor is in the closet, a
440A4 is connected on the line, or the jumper is set to ON in one of the
other sets on the line. When set to OFF, each of the two terminating
resistor jumpers covers the two top pins in each set. (The bottom pin in
each set is left uncovered.)
■ The terminating resistor jumpers must be set to ON when the set is in a
multipoint configuration and the terminating resistor is
not
in the closet, a
440A4 is not connected on the line, or the jumper is not set to ON in any of
the other sets on the line. When set to ON, each of the two terminating
resistor jumpers covers the two lower pins in each set. (The top pin in each
set is left uncovered.)
Switch Administration
Use the following information for administering an ISDN 8510T voice terminal.
■ An 8510T voice terminal connected to a DEFINITY G2 should be aliased
as a 7507 voice terminal.