Cisco XR 12000 Series - Manual (Page 37)

2-7
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
2-Port and 4-Port Channelized T3 to DS0 SPA Overview
2-Port and 4-Port Channelized T3 to DS0 SPA Overview
The following sections describe the 2-Port and 4-Port Channelized T3 SPA:
• 2-Port and 4-Port Channelized T3 SPA LEDs, page 2-7
• 2-Port and 4-Port Channelized T3 SPA Interface Specifications, page 2-8
• 2-Port and 4-Port Channelized T3 SPA Cables and Connectors, page 2-8
2-Port and 4-Port Channelized T3 SPA LEDs
The 2-Port and 4-Port Channelized T3 SPA has three types of LEDs. There are two LEDs for each port
on the SPA, and one STATUS LED.
Figure 2-2 shows an example of these LEDs on a 4-Port Channelized
T3 SPA.
Figure 2-2 4-Port Channelized T3 SPA Faceplate
Table 2-4 2-Port and 4-Port Clear Channel T3/E3 SPA Connectors
Connector Label Meaning
TX Transmitted signals appear on the center contact, and the outer shield is ground
for the 75-ohm RG-59 coaxial cable you attach to the TX BNC connector.
RX Received signals appear on the center contact, and the outer shield is ground for
the 75-ohm RG-59 coaxial cable you attach to the RX BNC connector.
1 C/A (Carrier/Alarm) LED 4 RX (Receive) connector
2 A/L (Active Loopback) LED 5 STATUS LED
3 TX (Transmit) connector
C/A
TX RX
1
ST
ATUS
SPA-4XCT3/DS0
0
A/L C/A
TX RX
A/L C/A
TX RX
2
A/L C/A
TX RX
3
A/L
1
2
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