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Cisco 7304 Router Modular Services Card and Shared Port Adapter Hardware Installation Guide

OL-4681-01

Chapter 3 Overview: Cisco 7304 Router Shared Port Adapters

OC-12 POS SPA Overview

1-Port OC-12c/STM-4 POS SPA LEDs

The 1-Port OC-12c/STM-4 POS SPA has three types of LEDs. There are two LEDs for each port on the

SPA, and one STATUS LED. Figure 3-11 shows an example of these LEDs on a 1-Port OC-12c/STM-4

POS SPA.

Figure 3-11 1-Port OC-12c/STM-4 POS SPA Faceplate

The 1-Port OC-12c/STM-4 POS SPA LEDs are described in Table 3-12.

1-Port OC-12c/STM-4 POS SPA Interface Specifications

The framer processes incoming and outgoing SONET or SDH frames. The framer operates at

OC-12c/STM-4 line rates (622.08 Mbps).

Packet data is transported with a user-configured encapsulation (such as Point-to-Point Protocol [PPP])

and is mapped into the STS-12c/STM-4 frame.

The 1-Port OC-12c/STM-4 POS SPA interface is compliant with the following RFCs:

• RFC 1619, PPP over SONET/SDH

• RFC 1662, PPP in HDLC-like Framing

1 C/A (Carrier/Alarm) LED 3 STATUS LED

2 A/L (Active Loopback) LED

SPA-1XOC12-POS

STATUS

A/L

C/A

129137

Table 3-12 1-Port OC-12c/STM-4 POS 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, loopback is off.

Amber On Port is enabled by software, loopback is on.

STATUS Off Off SPA power is off.

Green On SPA is ready and operational.

Amber On SPA power is on and good; SPA is being configured.

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Cisco 7304 Guide d'installation Page 38