Verilink AS4000 (34-00244) Product Manual - Manual (Page 181)

Verilink AS4000 User Manual 12-1
Chapter
12
Octal Voice Module
The AS4000 Octal Voice Module supports up to 8 voice channel
connections. Each voice channel is digitized using industry
standard PCM technology into a single DS0. Three available rear
interface modules allow support of E&M signalling, FXS or FXO
methods for connecting to the local telephone equipment or line.
This chapter covers the Octal Voice Module, the E&M Interface rear
module, the FXS-PLAR Interface rear module and the FXO-DPT
Interface rear module.
Installing Interface Modules
For best results, install the selected Interface Module (E&M, FXS, or
FXO) before installing the Octal Voice front module. This allows the
front module to detect the type of interface module fitted and
present appropriate menus. The interface module types are:
• Octal 4 Wire E&M - provides eight 4 wire interfaces via two 50-
pin Telco type connectors. Leads supported include Tip, Ring,
Tip1, Ring1, E, M, SB, and SG. Applications include 2/4 Wire
T0 analog data applications, and 2/4 Wire E&M voice trunks.
NOTE: The E&M method of connecting voice trunks uses two wires
for transmit, two wires for receive, two wires for E&M, one
wire for signal ground and one wire for battery ground. The
expression "4 wire" in this context means that the voice signal
itself is carried on four wires.
• Octal 2 Wire FXO/DPT - provides eight Foreign Exchange
Office (FXO) or Dial Pulse Temination (DPT) voice interfaces via
a 50-pin Telco type connector. The Octal 2W/FXO/DPT can
sink and detect ringing or sink and detect forward or reverse
battery current dependent on configuration. The 2W/FXO/DPT
can be employed to extend dial tone to a remote PBX or for
support of Direct Inward Dialing (DID).
• Octal 2 Wire FXS - provides eight Foreign Exchange Station
(FXS) voice interfaces via a 50-pin Telco type connector. The
Octal 2W/FXS supports distinctive ringing, and can utilize
loop start or ground start connections to conventional analog
telephone devices. Ring generation is integral to the 2W/FXS.
Use the Node Summary Menu to verify, and if necessary change
the front and rear module types for your voice application.