ADTRAN 1200130L2 Bedienungsanleitung PDF herunterladen (Seite 36)

22 FSU User Manual 61200.130L1-1

Chapter 4. Applications

In all cases, the FSU is transparent to the XID (exchange identifica-

tion) negotiation between any two network devices.

The FSU uses LLC protocol (mode 2) to transport SDLC informa-

tion frames. This protocol ensures a reliable link across frame

relay, providing protection from frame loss and excessive delays.

The encapsulation method uses the RFC 1490 format. See Table

4-A for an example of how to configure the FSU for this applica-

tion.

3270 Controller

FEP Host

SDLC

PU Address = C1

DTE1

DTE2

DTE1

DTE2

DLCI=17 DLCI=120

FSU

Remote End Host End

FSU

RFC1490/LLC2

UNI

PU Address = C0

3270 Controller

FRAME RELAY

Figure 4-1

SNA /SDLC with Local Spoofing

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ADTRAN 1200130L2 Bedienungsanleitung Seite 36