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Chapter 1
E&M+ DUAL VOICE OVERVIEW
61200105L2-1
Introduction
The E&M+ Dual Voice (E&M+) option module is one of
the option modules available for use with the ADTRAN
TSU 100/120/600. The E&M+ module provides two 2-
wire (2W) or 4-wire (4W) voice-grade interfaces serving
as tie-trunks using E&M signaling or as dedicated trans-
mission only (TO) interfaces for additional data services.
The E&M+ option module also accepts the E&M+ plug-
on board to provide up to four E&M+ functional ports per
option slot used, as well as accepting other plug-on mod-
ules.
The E&M+ plug-on board may be plugged onto any exist-
ing TSU option module.
The E&M option module and plug-on board are compat-
ible with Type I , Type II, and Type V (same premises wir-
ing) E&M signaling. E-lead originates on this interface
type, and is directly compatible with Type I, II, and V
M-lead originate interfaces typically found on PBXs and
switching equipment.
The E&M signaling type is selectable by the jumper locat-
ed near the rear panel. The J1
plug-on board (Part number 1200106L3) directly to the
right of the ADTRAN logo. The J2
the plug-in board(Part number 1200105L3) near the rear
panel directly to the right of the ADTRAN logo. By plac-
ing the jumper across Pins 1 and 2, Type I and Type II
E&M signalling is enabled. By placing the jumper across
pins 2 and 3, Type V E&M signaling is enabled.
E&M+ Dual Voice Option Module User Manual
is located on the
JUMPER
is located on
JUMPER
1-1
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