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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
The PA-MC-2T3+ is a single-width port adapter that provides two T3 interface connections using BNC
connectors. (See
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
The PA-MC-2T3+ has the following features and physical characteristics:
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OL-3526-05
Port Adapter Overview, page 1-1
Channelized T3 Overview, page 1-2
Unchannelized T3 Overview, page 1-2
T3 Specifications, page 1-3
LEDs, page 1-4
Port Adapter Slot Locations on the Supported Platforms, page 1-5
Identifying Interface Addresses, page 1-11
Figure
1-1.) Each T3 interface can be independently configured to be either
PA-MC-2T3+—Front Panel
The PA-MC-2T3+ supports both channelized and unchannelized operations.
It transmits and receives data bidirectionally at the T3 rate of 44.736 Mbps.
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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PA-MC-2T3+ Multi-Channel T3 Port Adapter Installation and Configuration
C H A P T E R
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MULTI-CHANNEL 2T3
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