Download MicroMatrix MMX-24 - Clear-Com

Return to Table of Contents
In addition to the point-to-point
communication described above, matrix
intercoms offer Party-Line type
conferences, IFB, Fixed Groups, and ISO
for private communication, control of
external devices including two-way radios
through the use of relays and the ability to
accept control inputs through the use of
GPIs (General Purpose Inputs). Interfaces
also exist for the MicroMatrix to interface to
2-wire, party-line intercoms; 4-wire circuits;
and dial-up telephone lines.
All of the preceding is explained in detail
later in this manual.
Wiring between intercom stations and the
MicroMatrix uses 4-pair Category 3 or
higher cable. The same cable and connectors
used for Ethernet are used for wiring ClearCom matrix intercoms. This leverages the
widespread deployment of Ethernet to make
cable and connectors readily and
inexpensively available for the installation
of Clear-Com matrix intercoms.
3.2. Party-Line Intercoms
Clear-Com’s 2-wire Party-Line intercom
uses a single audio pair to connect intercom
stations and Beltpacks to an intercom master
station via daisy-chain wiring. Audio and
DC power travel on this single pair and the
10
master station (or alternatively a power
supply) provides power to the other stations.
The daisy-chained devices form a single
channel that is a conference or party line.
Party line systems are available and offer
multiple channels. These channels can be
linked and unlinked to form one big party
line or separate party lines according to the
requirements of an application.
Limited IFB is possible with a Party-Line
Intercom System. Telephone and two-way
radio interfaces also exist for use with ClearCom’s Party-Line Intercom System.
Matrix intercoms offer superior audio
quality in comparison to many party-line
intercom systems. Matrix systems have
separate talk and listen circuits while PartyLine systems carry both talk and listen audio
as well as DC power on a single pair. PartyLine systems do not have the power and
flexibility that are available with matrix
systems.
According to the application, a Party-Line
intercom or a Matrix intercom may be most
appropriate to meet a users requirements.
Clear-Com Sales can assist a user in
determining the intercom system best suited
for a given application.
MicroMatrix User Manual