C H A P T E R
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PA-MC-2T3+ Multi-Channel T3 Port Adapter Installation and Configuration
OL-3526-05
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Overview
This chapter describes the Cisco PA-MC-2T3+ port adapter and contains the following sections:
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Port Adapter Overview, page 1-1
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Channelized T3 Overview, page 1-2
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Unchannelized T3 Overview, page 1-2
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•
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Port Adapter Slot Locations on the Supported Platforms, page 1-5
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Identifying Interface Addresses, page 1-11
Port Adapter Overview
The PA-MC-2T3+ is a single-width port adapter that provides two T3 interface connections using BNC
connectors. (See
.) Each T3 interface can be independently configured to be either
channelized or unchannelized. A channelized T3 provides 28 T1 lines multiplexed into the T3. Each T1
line can be configured into one or more serial interface data channels.
An unchannelized T3 provides a single serial interface data channel that may be configured to use all of
the T3 bandwidth or a fractional portion of it. This mode is compatible with several vendors of fractional
(subrate) DS3 data service units (DSUs).
Figure 1-1
PA-MC-2T3+—Front Panel
The PA-MC-2T3+ has the following features and physical characteristics:
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The PA-MC-2T3+ supports both channelized and unchannelized operations.
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It transmits and receives data bidirectionally at the T3 rate of 44.736 Mbps.
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It conforms to relevant specifications for DS3 (Digital Signal Level 3) circuits.
•
The T3 connection, provided by two female BNC connectors for transmit (TX) and receive (RX),
requires 734A coaxial cable that has an impedance of 75 ohms.
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