TTSI2K32T 데이터 시트보기 (PDF) - Agere -> LSI Corporation

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TTSI2K32T

2048-Channel, 32-Highway Time-Slot Interchanger

Agere -> LSI Corporation 

Preliminary Data Sheet

February 1999

Typical TSI Application

T1/E1 LIU AND FRAMER ICs

T7630/T7633

T1/E1

LINES

T1/E1

LIUs

T7698

T7693

T1/E1

FRAMERS

T7230A

TFRA08C13

TTSI2K32T

2048-Channel, 32-Highway Time-Slot Interchanger

DS0 SERVICE

COMPLEX

HDLC

FORMATTERS

ECHO

CANCELLERS

V.90 MODEMS

(DSPs)

SYSTEM

BACKPLANE

(8.192 Mbits/s)

TSI

MICROPROCESSOR

MICROPROCESSOR BUS

Figure 3. A Typical TSI Application

5-7074(F)r.2

A typical application that requires a TSI is where TDM highways that are carrying different types of data in 8-bit

time slots (64 kbits/s channels) need to be switched and sent to different destinations. For example, TDM high-

ways may contain time slots that are carrying voice, Internet traffic, signaling information, etc.

The TSI could be programmed to select all the time slots, carrying Internet data from different Rx highways to be

put on a another Tx highway that is connected to a bank of V.90 modems. Return data from these modems would

be sent via another set of Rx highways back to the TSI, which could send the data back out over a Tx highway and

to a T1 line via a T1 framer and LIU.

Similarly, time slots containing signaling information which is HDLC formatted can be sent to a bank of HDLC for-

matters. Voice channels that have echo on them could be selectively sent to echo cancellers. Data that needs to

be sent to another card in the system could be put on the system backplane via optional bus drivers.

Lucent Technologies Inc.

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