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CHAPTER 2: Introduction
2. Introduction
2.1 Description
The Micro T1 CSU/DSU supports a single T1 or Fractional T1 connection at data
rates of 1.544 Mbps (unstructured), n
×
64, and n
×
56. Plug the Micro T1
CSU/DSU directly into the WAN port of a switch, router, or multiplexor.
The Micro T1 CSU/DSU is easily configurable using two PC-board-mounted DIP
switches. Use the DIP switches to set D4 or ESF framing modes, AMI or B8ZS line
coding, clocking modes, T1 starting channel, Line Build Out, and data rate.
Connecting directly to the V.35 interface, the ultra-compact Micro T1 CSU/DSU
attaches without using additional cables. Twisted-pair line connections are made
through a modular RJ-48 female jack on the rear of the unit.
Seven easy-to-read LED indicators monitor data, network, and test signals.
2.2 Features
• Operates over 4-wire T1 (DS1) circuits.
• Supports unstructured rates at 1.544 Mbps.
• Supports common framed n
×
56/64 rates up to 1.536 mbps.
• Seven easy-to-read LEDs monitor data and diagnostics.
• Internal or external network clocking.
• Also works as a high-speed point-to-point modem.
• Compact size; plugs directly into a router, switch, or other DTE.
2.3 Supported Applications
The Micro T1 CSU/DSU supplies the interface between the telephone-company
and customer-premises equipment (such as a router). The Micro T1 CSU/DSU
can also be used as a high-speed short-haul modem for campus applications.
