Panasonic CPC-EX Manual De Usuario

Section 300-Installation

Chapter 4. Trunks and Lines

DBS-2.3/9.2-300

DBS Manual - Revised April 2000

  4-11

Connect the test set across the tip and ring of the trunk to be tested. With 
the test set in the “monitor” position, apply ground to the ring side of the 
trunk. 

If you hear dial tone, the polarity of the trunk is okay, and you can switch 
the test set to the “talk” mode to test the voice path. 

If you do not hear dial tone, ground the tip side of the trunk. If you  
receive dial tone when grounding the tip side, polarity is reversed. 

Read the following guidelines before beginning T1 installation. Installation 
instructions begin on page 4-21.

• The T1 requires the following DBS hardware.

CPC-B 4.0 or 
Higher
(VB-43411)

SCC-B 
(VB-43421)

T1 Trunk Card
(VB-43561)

T1 MDF Card
(VB-43562)

Sync Unit
(VB-43563)

1

(See Note 1.)

 

1 

(See Notes 2 and 3.)

1

1

1

1. Version 1.3 or higher 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 signaling, an MFR card is not required.

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