Loop-Start Trunks; Table 5-2 Maximum Loop-Start Trunks Per System; Figure 2-16 Ltrk/8 Card - Panasonic DBS 576 Technical Manual

Chapter 5 - Trunks and Extensions

Loop-Start Trunks

Guidelines
• Loop-start trunks are connected to a LTRK/8 card (VB-44510) installed in a
• One or more Trunk MDF Cards (VB-44512) must be installed to support
• Each trunk card requires a modular cable assembly (supplied with trunk card).
• Cabling must also be completed from the MDF interface card to the MDF (cables
• The maintenance switch (SW1) on the LTRK/8 card can be set so that the card
• A Caller ID Card (VB-44513) may be installed on the LTRK/8 to provide caller
• Table 5-2 shows the maximum numbers of cards and trunks per system type.
Table 5-2. Maximum loop-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
Installation
Note:
to a Trunk MDF Interface Card (VB44512) mounted on the side of the cabinet. See
"Trunk MDF Interface Card" on page 5-4 for more information on installing a Trunk
MDF Interface Card.
1. If installing a Caller ID (CID, VB-44513) piggyback card, install the card as
5-6
flexible slot of the cabinet. A maximum of 8 trunks can be connected to each
LTRK/8 card.
connection of trunks from the Main Distribution Frame (MDF) to the LTRK/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.
ID numbers.
Maximum Number of Cards
2)
5
2)
5
3)
5
4)
5
Prior to installing the Loop Start Trunk Card, make certain you can connect
shown in Figure 5-3.
DBS 576 (USA), issued 6/2/98
LTRK/8 card
Maximum Number of Loop
12
24
36
48
60
72
Section 300-Installation
Start Trunks
1-96
1-192
1-288
1-384
1-480
1-576
576-13-300