Cisco XR 12000 Series Manual do Utilizador descarregar pdf (Página 38)

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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

The 2-Port and 4-Port Channelized T3 SPA LEDs are described in Table 2-5.

2-Port and 4-Port Channelized T3 SPA Interface Specifications

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

g832) frames. The framer operates at T3/E3 line rates (44.2 44.736/34.368 Mbps) depending on the

mode in which it is configured.

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 2495, RFC 2496, and T1.231.

Note The 2-Port and 4-Port Channelized T3 SPA supports Frame Relay Fragmentation (FRF.12) and Multilink

Fame Relay (MFR) features for Cisco IOS XR Software Release 3.6.0 and later releases.

2-Port and 4-Port Channelized T3 SPA Cables and Connectors

The interface connectors on the 2-Port and 4-Port Channelized T3 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 Channelized T3 SPA. The cables have BNC

connectors 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)

Ta bl e 2-5 2-Port and 4-Port Channelized T3 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.

Green On SPA is ready and operational.

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

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Cisco XR 12000 Series Manual do Utilizador Página 38