MX97102 Просмотр технического описания (PDF) - Macronix International

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MX97102

ISDN S/T CONTROLLER

Macronix International 

MX97102

Functional and Operational Description

ISDN ACCESS ARCHITECTURE

MX97102 is designed especially for subscriber termi-

nal equipment with S/T interfaces, Four wire, two pairs

for transmission and receiption separately, are con-

nected to the NT equipment at the user site. Via the NT

equipment, subscribers could dial up to the wide-area

network with the traditional telephone line. The NT

serves a converter between the U interface at the ex-

change and the S interface at the user premises. The

NT may be either an NT1 only or an NT1 together with

an NT2 connected via the T interface which is physi-

cally identical to the S interface. NT2 may include higher

level functions like multiplexing and switching as in a

PBX. Figure 5 illustrates the connections between the

user site to the public domain of central office.

TE(1)

S

TE(8)

LT-S

S

TE(1)

LT-S

ISDN

central office

T

U

LT-T

NT1

LT

telephone

line

TE(1)

TE(8)

LT-S

PBX(NT2)

S

NT1

LT

Direct Subscriber Access

= MX97102

where - TE is an ISDN terminal

- LT-S is a subscriber line termination

- LT-T is a trunk line termination

- LT is a trunk line termination in the central office

FIGURE 5 : ISDN - BASIC SUBSCRIBER ACCESS ACHITECTURE

MX97102 is based on the ISDN basic access, 192kbit/

s, which consists of two circuit-switched 64 kbit/s B

channels and a message oriented 16kbit/s D channel

for packetized data, signaling and telemetry informa-

tion. The D channel is processed by the LAPD control-

ler contained in the MX97102 and routed via a parallel

CPU interface to the terminal processor. The high level

support of the LAPD protocol which is implemented by

the MX97102 allows the use of a low cost processor in

cost sensitive applications.

P/N:PM0473

REV. 2.5, SEP. 05, 2000

9

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