Cisco AS5800 매뉴얼 - 페이지 2

{카테고리_이름} Cisco AS5800에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Cisco AS5800 16 페이지. Access server channelized t1/e1 trunk cards
Cisco AS5800에 대해서도 마찬가지입니다: 매뉴얼 (22 페이지)

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CT3 Trunk Card Overview

Figure 3-1

Transmit DSx1 connector

Receive DSx1 connector

Each CT3 trunk card performs the following functions:

Provides physical termination for as many as 672 sessions.

•

Provides digital termination for as many as 256 DS0 connections (calls) using onboard High-Level

Data Link Control (HDLC) controllers. Note that the D-channel of a PRI consumes a single channel

of an HDLC controller.

Removes framing and embedded signaling bits (or inserts them, depending on the direction of the

•

flow), demultiplexing the calls. The framer CPU sends the data stream to onboard time-division

multiplexing (TDM) resources, which break out each call and pass each call to an appropriate call

termination resource. Digital or ISDN-originated calls are terminated onboard the CT3 trunk card

on HDLC controllers.

Note

Analog modem-originated calls are passed over the dial shelf backplane TDM bus to an available

modem resource. The system software controls modem and HDLC resource management.

•

Responds to time-sensitive signaling. Each CT3 trunk card can supply two clocks from any two of

its 28 ports. You can assign priorities to these clocks or accept the default values assigned by the

software.

Cisco AS5800 Universal Access Server Dial Shelf Card Guide

3-2

CT3 Trunk Card

HCPU

Receive BNC connector

Transmit BNC connector

Each D-channel consumes an HDLC controller.

HCPU

Chapter 3

Channelized T3 Trunk Card

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