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DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
ISDN Voice Terminals
17-36The ISDN 8510 Voice/Data Terminal
17
Power Requirements
Phantom or Auxiliary Power
The 8510T can receive power from the switch or from an auxiliary power supply.
NOTE:
A voice/data set should be auxiliary powered only.
The installer can select the type of power used by placing the two power jumpers
over the correct set of pins.
The power option jumpers are located at the bottom center of the terminal. On the
right side of the pins, on the plastic housing, you will see the label POWER and a
diagram of the correct settings. The jumpers are labeled PHAN (phantom power)
and AUX (auxiliary power). The terminal is shipped in the AUX position. You must
verify that the jumper settings are set correctly for your configuration.
NOTE:
The power jumpers must be set
only
by qualified service personnel.
■ PHAN (phantom power) should be selected when power is provided by the
PBX. When the jumpers are set to PHAN, in idle condition, less than one
Watt of power will be drawn from the switch. The power option resistors are
set to PHAN if each of the two jumpers covers the two top pins in each set.
(The bottom pin in each set is left uncovered.)
■ AUX (auxiliary power) should be selected when power is provided in the
closet. When the jumpers are set to AUX, the 8510T will operate on a
nominal 40 or 48 Vdc, UL-listed Communications Circuit Power source.
The power option resistors are set to AUX if each of the two jumpers covers
the two lower pins in each set. (The top pin in each set is left uncovered.)
NOTE:
It is a requirement that 8510T voice only terminals in a multipoint
configuration (two or more terminals per port) be auxiliary powered. If
used ONLY in a point-to-point configuration (one terminal per port),
8510T terminals may be phantom powered. When used in a mixed
point-to-point and multipoint configuration, all 8510T terminals MUST
be auxiliary powered.
If a phantom powered 8510T is moved from an existing point-to-point
to a multipoint configuration, the power jumper must be changed from
PHAN to AUX, and the terminal connected to an auxiliary power
source. The terminal will still work in the PHAN mode, but the power
jumper must still be changed. Exceeding the phantom power capacity
will trip the breaker in the carrier, causing a loss of service.