YTD421B-E Ver la hoja de datos (PDF) - Yamaha Corporation

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YTD421B-E

ISDN Driver/Receiver

Yamaha Corporation 

6

CHAPTER 2. BLOCK DIAGRAM

2.2 System Block Diagram

YTD421B can be used as the ISDN BRI S/T interface driver/receiver on both TE side and NT side. Some

examples of the system block diagram using YTD421B are shown in Figure 2.2 and Figure 2.3.

Terminal Adapter with S/T interface

DSU

RS232

S/T

U

YTD425 YTD418 YTD421B

or

YTD423B

(TE side)

YTD421B

(NT side)

YTD426B

and

YTD427

Figure 2.2: Example 1 : Terminal Adapter with S/T Interface and NT1

Terminal Adapter with U interface

RS232

U

YTD425

S/T

YTD418

or

YTD423B

YTD426B

and

YTD427

YTD421B

(NT side)

Figure 2.3: Example 2 : Terminal Adapter with U Interface

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