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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

T3/E3 Serial SPA Overview

The 2-Port and 4-Port T3/E3 Serial SPA LEDs are described in Table 3-13.

2-Port and 4-Port T3/E3 Serial SPA Interface Specifications

The framer processes incoming and outgoing T3 (cbit, m13/m23, and unframe) and E3 (g751, g832, and

unframe) frames. The framer operates at T3/E3 line rates (44.2/34.0 Mbps) depending on which mode

it is configured in.

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

or High-Level Data Link Control [HDLC]), and is mapped to T3 and E3 frames. The encapsulations add

transport overhead to the packet of data frames before transporting, and are stripped when a packet is

transported to the far end.

The T3/E3 SPA interface is compliant with ANSI and Telco standards. The interface also provides

support for Management Information Base (MIB) (RFC 2496) and T1.231.

2-Port and 4-Port T3/E3 Serial SPA Cables and Connectors

The interface connectors on the 2-Port and 4-Port T3/E3 Serial SPA are 75-ohm coaxial Siemax types,

with one connector and cable for transmit (TX) and one for receive (RX).

The following cables can be used with the 2-Port and 4-Port T3/E3 Serial SPA. The cables have BNC

on one end and the Siemax connectors on the other.

• CAB-T3E3-RF-BNC-M (T3 or E3 Cable, 1.0/2.3 RF to BNC-Male, 10 Feet )

• CAB-T3E3-RF-BNC-F(T3 or E3 Cable, 1.0/2.3 RF to BNC-Female, 10 Feet )

• CAB-T3E3-RF-OPEN (T3 or E3 Cable, 1.0/2.3 RF to BNC-Open end, 10 Feet )

1 C/A (Carrier/Alarm) LED 4 RX (Receive) connector

2 A/L (Active Loopback) LED 5 STATUS LED

3 TX (Transmit) connector

Table 3-13 2-Port and 4-Port T3/E3 Serial 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 E3 or T3 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 the SPA is being configured.

Green On SPA is ready and operational.

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Cisco 7304 Guide d'installation Page 41