Connector PinsSubscriber
Not connected
22472373TX TipTX RingLine 22
2247Not connected4797RX TipRX Ring
Not connected
23482474TX TipTX RingLine 23
2348Not connected4898RX TipRX Ring
Not connected
24492575TX TipTX RingLine 24
2449Not connected4999RX TipRX Ring
RJ-45 Cable Pinouts
T1 lines from individual subscribers are attached to the 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 CEoP SPAs to each other, you must cable both the
SPA’s patch panels together using a T1 crossover cable or a T1 straight through cable. The type of cable you
use (crossover or straight through) depends on how the CEoP SPAs are cabled to their patch panels:
• If both the 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 crossover cable to connect the patch panels
to each other.
• If both the 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 CEoP SPA Patch Panel
A 24-port channelized T1/E1/J1 CEoP SPA patch panel with the DCC2484/25T1-S part number is available
from Optical Cable Corporation (OCC) at:
http://www.occfiber.com/main/index.php
Cisco ASR 9000 Series Aggregation Services Router SIP and SPA Hardware Installation Guide
65
Overview: Cisco ASR 9000 Series Router Shared Port Adapters
RJ-45 Cable Pinouts
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