Table 2-15 Ground Start/Loop Start Jumper Settings Of Lgtrk/8 Card - Panasonic DBS 576 Technical Manual

Chapter 2. System Overview
LGTRK / 8 card (VB-44511): Loop Start/Ground Start Trunk
Card
The LGTRK/8 card is an interface that accommodates both loop start type analog
trunks and ground start analog trunks. Each trunk circuit type (either ground start or
loop start) is specified by a program setting as well as by two jumpers settings.
This card is mounted on a flexible slot to connect general analog telephone lines.
The LGTRK/8 card provides an 8 circuit trunk interface and can serve the functions
of detection and answering of call signals from the trunk, sending call signals to the
trunk, dialing and speech.
The LGTRK/8 card provides a lightening arrester and a safety circuit to directly
connect with general telephone lines.
Note: To use the LGTRK/8 card, a built-in -48V power supply is required in
the same cabinet. The -48V power supply signal ground (SG) connector must
be properly connected to ground for the ground start trunks to operate
correctly.
Each circuit has two jumper connectors (CNX01 and CNX02). When jumpers are
installed on both jumper connectors, the circuit is set for Ground Start operation.
When the jumpers are not installed, the circuit is set of Loop start operation.
Table 2-15. Ground Start/Loop Start jumper settings of LGTRK/8 card
Jumper
Connector
CN101 & CN102
CN201 & CN202
CN301 & CN302
CN401 & CN402
CN501 & CN502
CN601 & CN602
CN701 & CN702
CN801 & CN802
2-24
Jumper Description
ON Circuit 1 is in ground start mode
OFF Circuit 1 is in loop start mode
ON Circuit 2 is in ground start mode
OFF Circuit 2 is in loop start mode
ON Circuit 3 is in ground start mode
OFF Circuit 3 is in loop start mode
ON Circuit 4 is in ground start mode
OFF Circuit 4 is in loop start mode
ON Circuit 5 is in ground start mode
OFF Circuit 5 is in loop start mode
ON Circuit 6 is in ground start mode
OFF Circuit 6 is in loop start mode
ON Circuit 7 is in ground start mode
OFF Circuit 7 is in loop start mode
ON Circuit 8 is in ground start mode
OFF Circuit 8 is in loop start mode
DBS 576 (USA), issued 6/2/98
Section 300-Installation
576-13-300