YTD439 查看數據表（PDF） - Unspecified

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产品描述 (功能)

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YTD439

ISDN BRI controller for Terminal Equipment with built-in DSU

Unspecified 

❑ Block Diagram

❍ User-Network Interface Block Diagram

YTD439 is best-suited for applications in terminal equipment with built-in DSU (TA, TE1)

such as terminal adapters and remote routers with built-in DSUs.

YTD439 contains a DSU function, which is necessary between the ISDN switch and the user-

network interface, and layer 1 and layer 2 functions, which are required of ISDN system

equipment. By adding minimal peripheral parts such as microprocessor and CODEC, terminal

equipment can be optimally configured.

R

TE2

S/T

TE1

TA with

built-in DSU

S

T

U

TE1

(ISDN terminal)

R

S

NT2

(PBX, etc.)

NT1

(DSU)

TE2

TA

(Non-ISDN (Terminal adapter)

terminal)

S/T

TE1

R

TE2

S/T

U

User's premises

TE1

TA with

built-in DSU

ISDN

Network

YTD439

YTD436 or

YTD423 + YTD421

YTD428 (DSU)

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