Cisco 7300-6T3 User Manual download pdf (Page 14)

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Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration

OL-3449-02

Chapter 1 Overview

Features

The 6T3 line card provides the following features:

• Single-wide line card for the Cisco 7304 router

• Full-duplex synchronous serial DS3 interface

• High-Level Data Link Control (HDLC) data

• Integrated data service unit (DSU) functionality

• Support for 16- and 32-bit cyclic redundancy checks (CRCs)

• Support for Frame Relay, HDLC, and PPP serial encapsulations

• Support for DS3 MIB (RFC 1407)

• Support for remote and local loopbacks

• Six independent T3 ports

• Subrate DS3 support for Cisco, Kentrox, Larscom, and Digital Link formats along with the

associated scrambling. In some modes, the scrambling is optional.

• Clear-channel DS3 (framed but unchannelized)

• M23 and C-bit-parity DS3 frame formats

• Extraction of BOCs on the C-bit far-end alarm and control (FEAC) code

• Detects and counts remote alarm indication (RAI), parity errors, far-end block error (FEBE), line

code violation (LCV), loss of light (LOL), out of frame (OOF), framing errors, loss of frame (LOF),

loss of signal (LOS)

• One-second performance monitoring counters

• Generates AIS and FEAC

• Generates F-, X-, P-, and M-bit errors; LCVs; all zeros; RAI; and FEBE for testing

• Line, payload, and diagnostic loopbacks

• One bicolor LED per T3 port

• Drives up to 900 feet of 75-ohm coaxial cable RG-59U or equivalent, 450 feet to DSX-3

demarcation point (DSX)

• 75-ohm SMB-type coaxial connections over ATT 734/728, 75-ohm coaxial cable

• B3ZS line coding

• Maintenance data link (MDL) messages

• Bit error rate testing

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Cisco 7300-6T3 User Manual Page 14