Panasonic CPC-EX User Manual

Chapter 4. Trunks and Lines

 Section 300-Installation

4-12

DBS Manual - Revised April 2000

DBS-2.3/9.2-300

• The T1 trunk card must be installed in the “EC/TRK” slot.

• The installer must provide a Channel Service Unit (CSU) that complies 

with FCC Part 15 and Part 68. The CSU is installed between the DBS and 
the public network. The CSU provides alarm, diagnostic, and monitoring 
functions, as well as network protection.

The CSU must be compatible with the framing format (SF or ESF) that is 
provided by the public network.

• One T1 card can be installed per cabinet.

• The number of T1 cards that can be installed in double-cabinet systems 

depends on the sizes of the connected systems. Table 4-12 on page 4-15 
shows T1 maximums for double-cabinet systems. 

Note: The DBS 72 + DBS 40 combination does not support T1.

(VB-43411)

(See Note 

1.)

SCC-B 

(VB-

43421)

(See Notes 

2 and 3.)

(VB-

43561)

(VB-

43562)

(VB-

43563)

(VB-

43564)

(VB-43110)

(See Note 

4.)

T1 in the

Master

1

1 

1

1

1

0

1

T1 in the 

Slave

1

1

1

1

1

1

1

T1 in both 

Master 
and

Slave 

1

1

2

2

1

1

1

Notes:

1. Version 1.3 of the Bus Processor Unit (BPU) chip is required for T1.

2. An MFR card is required for DID/DNIS if DTMF signaling is used. If DID/DNIS is provided through DP sig-
naling, an MFR card is not required.

3. SCC-B with ROM 1.3 or later is required if the central office does not provide T1 dial tone.

4. Version 1.2 of the Cable Kit is required for T1.