Cisco XR 12000 Series Hardware Installation Guide

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Cisco XR 12000 Series Router SIP and SPA Hardware Installation Guide
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Chapter 2 Overview: Cisco XR 12000 Series Router Shared Port Adapters
24-Port Channelized T1/E1/J1 ATM CEoP SPA Overview
RJ-45 Cable Pinouts
T1 lines from individual subscribers are attached to RJ-45 connectors on the front of the 24-port patch
panel. Each RJ-45 port accommodates an individual T1 subscriber line.
Pins 1 and 2 and 4 and 5 of the RJ-45 connectors are used for the 24-port CEoP SPA’s Transmit (TX)
and Receive (RX) signals. Depending on how the cable is installed between the SPA and its patch panel
(rear), the RJ-45 connectors operate as follows:
• If the TX cable lead is connected to Transmit on the patch panel and RX is connected to Receive:
– The SPA’s TX signals are transmitted on RJ-45 pins 1 (ring) and 2 (tip).
– The SPA’s RX signals are received on RJ-45 pins 4 (ring) and 5 (tip).
• If the TX cable lead is connected to Receive on the patch panel and RX is connected to Transmit:
– RJ-45 pins 1 and 2 are used for the SPA’s RX signal.
– RJ-45 pins 4 and 5 are used for the SPA’s TX signal.
Patch Panel Cabling
If you are connecting two 24-Port Channelized T1/E1/J1 ATM CEoP SPAs to each other, you must cable
both SPA’s patch panels together using a T1 cross-over cable or a T1 straight-through cable. The type of
cable you use (cross-over or straight-through) depends on how the CEoP SPAs are cabled to their patch
panels:
• If both CEoP SPAs are connected to their patch panels in the same manner (TX to Transmit and
RX to Receive, or TX to Receive and RX to Transmit), use a T1 cross-over cable to connect the
patch panels to each other.
• If both CEoP SPAs are connected to their patch panels in a different configuration (TX to Transmit
and RX to Receive on one SPA, and TX to Receive and RX to Transmit on the other SPA), use a
T1 straight-through cable (standard RJ-45 patch cable) between the patch panels.
24-Port Channelized T1/E1/J1 ATM CEoP SPA Patch Panel
The recommended patch panel is part number DCC2484/25T1S from SMP Data Communications
(http://www.smpdata.com).
To order the patch panel, contact the Sales and Marketing Support staff at SMP Data Communications:
• 800-880-7674 (toll free in the U.S.A.)
• 828-298-2260 (outside the U.S.A.)
• ciscoinfo@smpdata.com (email)
Line 24 TX Tip
TX Ring
25
75
24
49
Not connected
RX Tip
RX Ring
49
99
Not connected 24
49
Table 2-49 24-Port Channelized T1/E1/J1 ATM CEoP SPA Cable Connector Pinouts (continued)
Subscriber Connector Pins
Line Signal SPA TX Cable Lead RX Cable Lead

Cisco XR 12000 Series Specifications

General

Brand	Cisco
Model	XR 12000 Series
Category	Network Router
Language	English