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2500-Series Data Service Unit (DSU)
2500-Series Data Service Unit (DSU)
The 2500-Series DSUs allow the user’s computer or Data Terminal Equipment (DTE) to com-
municate with remotely located equipment using Digital Data Service network lines. The DSU
integrates all Channel Service Unit (CSU) and DSU functions into one unit and connects between
the network interface and the user’s DTE.
municate with remotely located equipment using Digital Data Service network lines. The DSU
integrates all Channel Service Unit (CSU) and DSU functions into one unit and connects between
the network interface and the user’s DTE.
The DSU can operate as a point-to-point Local Area Data Set (LADS). It is used when the DCIU
and external processor are more than 400 feet apart. Two DSUs per external processor are
required.
and external processor are more than 400 feet apart. Two DSUs per external processor are
required.
Physical Description
d
Stand-alone Dimensions (approximate)
Width = 5-3/4 inches
Depth (front to back) = 9-5/8 inches
Height = 2 inches
d
Multiple Mounting Dimensions (approximate)
Width = 23 inches
Depth (front to back) = 20 inches
Height = 7 inches
Features
d
Full-duplex
d
Synchronous operation
d
Asynchronous operations with certain limitations when used as a LAD
d
Three color test and status LCD panel
d
Multi test functions
d
Two color test and Status/Fault indicator
d
User selectable options
d
Mounting
The 2500-Series DSU can be stand-alone or multiple mounted. The stand-alone units
can be wall or desk mounted. The multiple mounted units are mounted in a multiple-
mount housing that can house up to eight DSUs.
can be wall or desk mounted. The multiple mounted units are mounted in a multiple-
mount housing that can house up to eight DSUs.
d
Operating Speeds
The 2556A, 2556B, and 2556C operate at 56 kbps. The 2596A, 2596B, and 2596C have
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