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Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide
OL-5052-08
Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters
1-Port OC-12c/STM-4 ATM SPA Overview
The 1-Port OC-12c/STM-4 ATM SPA LEDs are described in Table 3-11.
1-Port OC-12c/STM-4 ATM SPA Interface Specifications
The physical layer interface for the 1-Port OC-12c/STM-4 ATM SPA is Optical Carrier-12 (OC-12), and
the 1-Port OC-12c/STM-4 ATM SPA is designed to comply with ATM specifications. The 1-Port
OC-12c/STM-4 ATM SPA provides one 622.08-Mbps OC-12 network interface for all supported
platforms.
The single SPA port accepts an SFP module with a duplex LC-type receptacle that allows connection to
single-mode or multimode optical fiber.
1-Port OC-12c/STM-4 ATM SPA Cables and Connectors
The 1-Port OC-12c/STM-4 ATM SPA provides the following optical fiber options:
• Multimode—622.08-Mbps, OC-12 optical fiber (SONET STS-12c or SDH STM-4)
Use a multimode optical fiber that has a core/cladding diameter of 62.5/125 microns.
• Single-mode—622.08-Mbps, OC-12 optical fiber (SONET STS-12c or SDH STM-4)
Use a single-mode optical fiber that has a modal-field diameter of 8.7 ±0.5 microns. (Nominal
diameter is approximately 10/125 microns.)
For single-mode and multimode optical fiber connections, you can use either a duplex LC-type cable (see
Figure 3-9) or two simplex LC-type cables, one for transmit (TX) and one for receive (RX).
Table 3-11 1-Port OC-12c/STM-4 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 ATM 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, loopback is off.
Amber On Port is enabled by software, 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.
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