Dcs signaling link connections, System 75 or generic 1 (g1) to system 75 or g1 – AT&T DEFINITY 7200 series User Manual

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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS)

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DCS SIGNALING LINK CONNECTIONS

Many variables influence how the signaling channel on one DCS node is connected to the signaling channel
on another DCS node. Chief among these variables is the types of communications systems being
connected. For example, the System 75 and Generic 1 communications systems are connected differently
to other System 75s and Generic 1s than they are to System 85s and Generic 2s. Furthermore, within the
constraints imposed by the communications systems being connected are other constraints imposed by the
distance that the transmission must travel, the availability of digital trunks, the cost, etc. All these variables
must be considered when you decide how to connect the DCS signaling links. Illustrated next are the types
of connections possible given the types of communications systems being connected.

The connections are classified as long haul and short haul. Long haul connections have virtually no
distance limitations. Distance limitations on short haul connections are established by the types of data
sets/modules used. When you choose to use a particular type of connection, you should consider the
following distance limitations:

Equipment Distance

Limitation

RS-232/RS-449 Link

50 ft

Isolating Data Interface (IDI)

400 ft.

Data Service Unit

2000 ft.

MTDM/MPDM 3500

ft.

DCP Link

5000 ft.

System 75 or Generic 1 (G1) to System 75 or G1

SIGNALING CHANNEL

ANALOG OR DS1 VOICE CHANNEL

MTDM

DCP

TN764

(DIGITAL LINE)

TN760

(TIE TRUNK)

TN722

OR TN767

(DS1)