Section 300-Installation

Chapter 4. Trunks and Lines

 

 

Ground Start and DID Trunks

Guidelines

The following procedure covers ground-start (VB-43531) and DID (VB- 43541) installation using the main trunk connector. For instructions on using the expansion trunk connector, see “Trunk and Line Expansion” on page 4-44.

For pinouts and color codes for the main trunk connector, see Table 4-2 on page 4-5.

Each circuit on the ground-start trunk card can be used as either a loop- start or ground-start trunk. By default, all circuits on the ground-start trunk are assigned as loop start.

The ground-start trunk card requires CPC-B Version 1.0 or higher.

The DID card requires CPC-B (Version 2.0 or higher) and SCC-B (Version 1.2 or higher).

Both ground start and DID trunks require an external -48V floating output power supply. The following table shows -48V power consumption for one- and two-cabinet systems.

Table 4-4. -48V current consumption for ground-start and DID trunks

System Size

Current Consumption

 

 

(Output voltage = 48 ±

4 V

 

Ripple voltage = ±500

mVp-p)

 

 

 

 

One-cabinet system

1

Amp

 

 

 

 

 

Two-cabinet system

2

Amps

 

 

 

 

 

The following -48V floating output power supplies have been tested with DBS ground-start and DID trunks.

Table 4-5. -48V power supplies tested with the DBS

Manufacturer

Model Number

Rating

 

 

 

Valcom

VP-2048B

2 Amps

 

 

 

Tellabs

81-8002

2 Amps

 

 

 

The following “Installation” section includes details on installing the -48V power supply.

DBS-2.3/9.2-300

DBS Manual - Revised April 2000

4-9

Page 57
Image 57
Panasonic CPC-EX manual Ground Start and did Trunks, Manufacturer Model Number Rating