Comdial DXP Plus Series, Руководство пользователя

Страница: 661 / 1176

2.3 Connecting The Equipment
Connect the cabling to the ATI-D-1PT per the diagram shown on the next page
CAUTION
Be careful when connecting the wiring between the DXP Plus and the ATI-D-1PT. Be sure to connect the
digital station port to the COMMON EQUIPMENT (KSU) jack on the ATI-D-1PT. Damage to the
ATI-D-1PT could occur if this wiring is mistakenly connected to the IST jack.
•
While a grounding wire is not required for operation, one is desirable for decreasing radio frequency
interference and electrostatic discharge susceptibility. A ground stud is provided on the ATI-D-1PT housing
for this purpose. Connect a #10 or #12, insulated, solid copper wire between this ground stud and a reliable
earth ground.
2.4 Verifying Proper Installation
Use a voltmeter to check for the presence of voltage on the ATI-D-1PT IST jack.
1. Be sure the wiring between the ATI-D-1PT and the common equipment station ports is properly installed.
2. Measure for DC voltage on the IST jack:
•
Measure between TIP leads and common equipment grounding stud.
•
Measure between RING leads and common equipment grounding stud.
•
Measure between TIP leads and RING leads.
The measured voltage must be within following limits (with the IST device on-hook):
MEASUREMENT
VOLTAGE
Tip to Ground -1 to +1 VDC
Ring to Ground -27 to -38 VDC
Tip to Ring +28 to +37 VDC
(The TIP lead is positive with respect to the RING lead.)
2.5 Installing OPX Long Loop Adapter For Off-Premise Service
As stated previously, the ATI-D-1PT is an on-premise device. You must use an OPX long loop adapter if you
wish to adapt the ATI-D-1PT to support an off-premise application.
An OPX long loop adapter connects to a single telephone line and can greatly extend the line’s loop length (the
Proctor Model 46222 adapter*, for example, can extend line length to 30,000 feet). In addition, such units can be
used to interconnect key systems (to share central office lines and system features).
*Proctor & Associates Company, Redmond, WA.
CAUTION
When you connect an adapter to an off-premise extension (OPX), you must insure that the telephone line
routed to the OPX has primary protectors installed in series with the tip/ring pair to protect both the user
and the equipment from transient voltage spikes that can travel through the cable. The telephone
company offers basic protection against this condition, but it is usually designed to protect the central
office circuits and you cannot rely upon it to protect common equipment. To help insure that external
over-voltage surges do not damage the system, technical experts recommend that you install and properly
ground gas discharge tubes or similar primary protection devices on the telephone line routed from the
adapter to the off-premise extension.
To install the OPX long loop adapter:
•
Follow manufacturer’s instructions for unpacking, inspecting, mounting and wiring the adapter unit.
•
Plug a modular cable into the system jack on the adapter and connect the opposite end of the cable to the IST
jack on the ATI-D-1PT.
IMI89–208 Installing And Programming For ATI–D–1PT
6 – Installing The ATI–D–1PT