3-5
Cisco CRS-1 Carrier Routing System SIP and SPA Hardware Installation Guide
OL-17439-01
Chapter 3 Overview: Cisco CRS-1 Shared Port Adapters
1-Port and 3-Port Clear Channel OC-3 ATM SPA Overview
Figure 3-2
3-Port Clear Channel OC-3 ATM SPA Faceplate
The 1-Port and 3-Port Clear Channel OC-3 ATM SPA LEDs are described in
Table 3-3
.
1-Port and 3-Port Clear Channel OC-3 ATM SPA Interface Specifications
The physical layer interface for the 1-Port and 3-Port Clear Channel OC-3 ATM SPA is Optical Carrier-3
(OC-3), and the data link layer is designed to comply with ATM specifications. The 1-Port and 3-Port
Clear Channel OC-3 ATM SPA provides up to one and three 155-Mbps OC-3 network interfaces,
respectively, for all supported platforms.
Each SPA port accepts an SFP module with a duplex LC-type receptacle that allows connection to
single-mode or multimode optical fiber.
1-Port and 3-Port Clear Channel OC-3 ATM SPA Cables and Connectors
The 1-Port and 3-Port Clear Channel OC-3 ATM SPA uses a small form-factor pluggable (SFP) optical
transceiver module installed in each port for SONET and SDH single-mode and multimode optical fiber
connection (see
Figure 3-3
).
1
C/A (Carrier/Alarm) LED
3
STATUS LED
2
A/L (Active Loopback) LED
ST
AT
U
S
A/L
C/A
Port 0 Port 1 Port 2
SPA-3XOC3-ATM-V2
270697
0
1
2
3
1
2
Table 3-3
1-Port and 3-Port Clear Channel OC-3 ATM SPA LEDs
LED Label
Color
State
Meaning
C/A
Off
Off
Port is not enabled by software.
Green
On
Port is enabled by
software
, and there is a valid SONET signal
without any alarms.
Amber
On
Port is enabled by
software
, and there is at least one alarm.
A/L
Off
Off
Port is not enabled by software.
Green
On
Port is enabled by
software
, and loopback is off.
Amber
On
Port is enabled by
software
, and loopback is on.
STATUS
Off
Off
SPA power is off.
Amber
On
SPA power is on and good, and SPA is being configured.
Green
On
SPA is ready and operational.
