- RAD Data Communications Ltd. RIC-E1 E1 Interface Converter Installation and Operation Manual

Introduction E-1
Appendix E
IR-X.21B Interface Module
Contents
E.1 INTRODUCTION .................................................................................................E-1
Application................................................................................................... E-1
Rear Panel.................................................................................................... E-1
E.2 SELECTING THE IR-X.21B TIMING ......................................................................... E-2
EXT Clock Mode........................................................................................... E-2
INT/LBT Clock Mode.................................................................................... E-3
E.1 Introduction
IR-X.21B is an interface module for the standalone RIC-E1 units, converting X.21
signals to TTL levels.
Application
Figure E-1 shows a typical application of RIC-E1 with IR-X.21B interface module.
X.21
RIC-E1
G.703
Network
Router
Figure E-1. Typical Application of RIC-E1 with IR-X.21B Module
Rear Panel
Figure E-2 shows the rear panel of RIC-E1 equipped with the IR-X.21B interface
module.
100-2 30 VAC 0.250A T 250V
LINK
TX RX
X.21
Figure E-2. Rear Panel of RIC-E1 with IR-X.21B Module
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