2-77
Cisco XR 12000 Series Router SIP and SPA Hardware Installation Guide
OL-17438-04
Chapter 2 Overview: Cisco XR 12000 Series Router Shared Port Adapters
24-Port Channelized T1/E1/J1 ATM CEoP SPA Overview
Cable Installation
One end of the cable has a 100-pin connector that plugs into the front of the 24-Port Channelized
T1/E1/J1 ATM CEoP SPA. Use the thumbscrews on either side of the connector to secure the cable to
the SPA.
The other end of the cable has two 50-pin Telco connectors that attach to the rear of a 24-port RJ-45
patch panel. Both connectors are identical: one is for Transmit (TX) and the other is for Receive (RX).
The following figure shows how the cable is connected between the 24-Port Channelized T1/E1/J1 ATM
CEoP SPA and the patch panel.
Figure 2-58
Cable Installation between SPA and Patch Panel
SPA Cable Pinouts
The following table shows the cable pinouts for the cable (part number CABLE-24T1E1J1) that is
installed between the 24-Port Channelized T1/E1/J1 ATM CEoP SPA and the rear of the patch panel.
SPA-24CHT1-CE-A
TM
250107
TRANSMIT
RECEIVE
24-Port Patch Panel
(rear view, rotated
180
o
for clarity)
Table 2-49
24-Port Channelized T1/E1/J1 ATM CEoP SPA Cable Connector Pinouts
Subscriber
Connector Pins
Line
Signal
SPA
TX Cable Lead
RX Cable Lead
Line 1
TX Tip
TX Ring
2
52
1
26
Not connected
RX Tip
RX Ring
26
76
Not connected
1
26
Line 2
TX Tip
TX Ring
3
53
2
27
Not connected
RX Tip
RX Ring
27
77
Not connected
2
27
Line 3
TX Tip
TX Ring
4
54
3
28
Not connected
RX Tip
RX Ring
28
78
Not connected
3
28
