Table of Contents
Advertisement
CTP 5.2 Hardware Guide
20
CTP2000-Series Modules
Table 4: 4W-E&M RTM Pinouts–Connector B (continued)
Connector B
PIN
Signal
18
19
20
21
22
23
24
25
GND
Table 5: Signal Definitions
Signal Name
Signal Definition
Port x T, R
Audio transmit pair, 600 Ohm
Port x T1, R1
Audio receive pair, 600 Ohm
Port x E
E lead–output
Port x M
M lead–input
Port x SG
Input for signal ground for signaling type II
Port x SB
Output signal battery (–48V) for signaling type II. Note that JP17 must be
in position 1-2.
GND
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.
Supervisory Signaling
Supervisory signaling is the means by which a telephone user requests a service or
initiates a call. The signaling unit (CTP system) interacts with the trunk unit (PBX)
by means of either two or four leads, depending on the signaling type. (See
Figure 25.) The signaling unit controls the E lead while 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 6 for a summary of signaling types supported by the
CTP2000-IM-4WEM module.
Signal
PIN
43
44
45
46
47
48
49
GND
50
Advertisement
Table of Contents
