Section 365–262–205
2
1.
GENERAL
1.1
Document Purpose
This document provides information on the Charles Industries 3652–62 (Equipment Issue 5) and 3652–68 (Equip-
ment Issue 6) 4-Wire E&M with PLR and ER (4W E&M/PLR) Channel Units. These channel units are used in the
Charles Industries 360/363 D4 Digital Carrier Terminal. The 3652–62 is shown in Figure 1. Table 1 lists the 4W
E&M/PLR channel units and those of the former issue which they replace.
Field repairs/modifications may void compliance with UL 1459 - Second Edition.
*CAUTION
Table 1. 4W E&M/PLR Channel Unit Cross Reference
Model
Issue
Description
Replaces
Model
Issue
3652–62
5
4W E2M2 w/jacks, PLR, and
ER
3652–02
3652–12
3652–62
2
1
3
3652–68
6
4W E&M w/jacks, PLR, and
ER
3652–13
1
1.2
Document Status
This document is reprinted to include a general editorial update.
1.3
Equipment Function
1.4
Equipment Location/Mounting
Occupies one channel unit slot of a Charles Industries 360/363 D4 Digital Carrier Terminal.
1.5
Equipment Features
The 4W E&M/PLR channel units include the following features:
Compliance with the specifications in AT&T Publication 43801
Compliance with UL Standard 1459 Second Edition (3652–68 only)
Front-panel NORM/BUSY switch
Front-panel BUSY LED indicator
Selectable Type I, II or III E&M or PLR signaling interface
Prescription transmit and receive gain controls in 0.1dB steps
Extended Range (ER) capability (+10dBm to –22.5dBm)
Front-panel lifting jacks
E&M reversal capability to accommodate office wiring and test equipment interfacing
Automatic trunk processing during a carrier failure
Additional set of E&M leads on the 3652–62
The 4W E&M/PLR channel units contain lifting jacks which provide access by breaking the line toward the DROP
(trunk facility) and LINE (carrier facility). Jacks are provided on T&R, E&M, and T1&R1 leads.
