Loop-Start/Ground Start Trunks; Table 5-5 Maximum Loop-Start/Ground-Start Trunks Per System; Figure 2-18 Lgtrk/8 Card - Panasonic DBS 576 Technical Manual

Chapter 5 - Trunks and Extensions

Loop-Start/Ground Start Trunks

Guidelines
• Loop-start and or ground-start trunks are connected to a LGTRK/8 card (VB-
• Both jumpers settings and system programming determines if the circuit is used
• A -48V Power Supply must be installed in the same cabinet as the LGTRK/8 card
• One or more Trunk MDF Cards (VB-44512) must be installed to support
• Each trunk card requires a four (4) RJ-11 modular cable assembly (supplied).
• Cabling must also be completed from the MDF interface card to the MDF (cables
• The maintenance switch (SW1) on the LGTRK/8 card can be set so that the card
• Table 5-5 shows the maximum numbers of cards and trunks per system type.
Table 5-5. Maximum Loop-Start/Ground-Start Trunks Per System
System Type
96 ports (CAB96 1)
5
192 ports (CAB96 + CAB96B)
288 ports (CAB96 + CAB96B
384 ports (CAB96 2 + CAB96B
5
480 ports (CAB96 2 + CAB96B
5
576 ports (CAB96 2 + CAB96B
5
5-10
44511) installed in a flexible slot of the cabinet. A maximum of 8 trunks can be
connected to each LGTRK/8 card.
as a loop-start trunk or a ground start trunk. After the card in installed, the circuit
must also be properly programmed. See Programming Section 400 - Analog
Trunk Programming - Trunk Signal Type.
for ground start trunks to operate.
connection of trunks from the Main Distribution Frame (MDF) to the LGTRK/8
card. Each Trunk MDF supports up to three LTRK/8, LGTRK/8 or DIDTR/8
cards (up to 24 trunks). See "Trunk MDF Interface Card" on page 5-4 for
information on installing the Trunk MDF Interface Card.
not supplied).
can be removed and installed while the system is operating. See page 5-1 for
details on the maintenance switch.
Maximum Number of Cards
2)
5
2)
5
3)
5
4)
5
DBS 576 (USA), issued 6/2/98
LGTRK/8 card
Maximum Number of
Ground Start/Loop Start
12
24
36
48
60
72
Section 300-Installation
Trunks
1-96
1-192
1-288
1-384
1-480
1-576
576-13-300