Cisco XR 12000 Series Manual de usuario descargar pdf (Pagina 36)

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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 T3/E3 Serial SPA Overview

2-Port and 4-Port Clear Channel T3/E3 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 (44.736 /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 2496 and T1.231.

2-Port and 4-Port Clear Channel T3/E3 SPA Cables and Connectors

The interface connectors on the 2-Port and 4-Port Clear Channel T3/E3 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 Clear Channel T3/E3 SPA. The cables have

BNC connectors on one end and the Siemax connectors on the other. If similar SPAs are connected

back-to-back, both ends of cable will be Siemax.

• 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)

Note The Cisco cable part numbers are 72-4124-01 (with male BNC end) and 72-4131-01 (with female BNC

end).

Figure 2-1 shows the connectors on the 4-Port Clear Channel T3/E3 SPA, and Table 2-4 describes the

signal descriptions for these connectors.

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.

Green On SPA is ready and operational.

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

Table 2-3 2-Port and 4-Port Clear Channel T3/E3 SPA LEDs (continued)

LED Label Color State Meaning

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 147 148

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