Juniper CTP1000 Series User Manual

Table 4: Signal Definitions
Signal DefinitionSignal Name
Audio transmit pair, 600 OhmPort x T, R
Audio receive pair, 600 OhmPort x T1, R1
E lead–outputPort x E
M lead–inputPort x M
Input for signal ground for signaling type IIPort x SG
Output signal battery (–48V) for signaling type II. Note that JP17
must be in position 1-2.
Port x SB
Signal ground. E and M leads are referenced to this ground for
signaling types I and V. Use JP26 to connect this ground to chassis
ground.
GND
Supervisory Signaling
Supervisory signaling is the means by which a telephone user requests a service or initiates
a call. The signaling unit (CTP platform) interacts with the trunk unit (PBX) by means of
either two or four leads, depending on the signaling type. (See Figure 18 on page 18.) The
signaling unit controls the E lead, whereas the trunk side controls the M lead. The two
signaling states are on-hook and off-hook. During inactivity both units are on-hook. See
Table 5 on page 19 for a summary of signaling types supported by the CTP2000 4WE&M
module.
17Copyright © 2017, Juniper Networks, Inc.
Chapter 2: CTP2000 Series Interface Modules

Juniper CTP1000 Series Specifications

General

Brand	Juniper
Model	CTP1000 Series
Category	Network Hardware
Language	English