ADTRAN 1202300L1, User Manual

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61202300L1-1 FXS+ Quad Voice Option Module User Manual 1-1
Chapter 1
Introduction
FXS+ QUAD VOICE OVERVIEW
The FXS Quad Voice option modules can be used with the
ADTRAN TSU 100/120/600. The Quad FXS+ module
provides four, 2-wire voice-grade interfaces serving as
the source of line-current and ringing voltage to a tele-
phone or station interface.
FXS+ Uses
The FXS+ may serve as the station-side of a foreign ex-
change FXS/FXO application. It may be paired with an-
other FXS+ to provide a hotline or private line automatic
ringdown (PLAR) function to a remote location at the far
end of the T-Span.
When the FXS+ is used in the tandem mode, it can be set
to accept phone service directly from a toll switch using
E&M signalling on the T-Span (e.g., 1-800 services, Mega-
com). It may also be used to provide trunk services to a
PBX from a local switch. The FXS+ is intended for use in
applications where the 2-wire port wiring remains on
premises.
The FXS+ option modules support Single Party and Uni-
versal Voice Grade (UVG) Channel Unit Operation as speci-
fied by TR-TSY-000008. The FXS+ module and a TSU 600/
600e can act as a remote terminal in a digital loop carrier
application. Signalling and interfaces comply with por-
tions of EIA/TIA-464-A, T1.401, and AT&T Pub. 41458 and
Pub. 43801.