5
CONTENTS
Contents
Chapter
Page
1. Specifications ...................................................................................................6
2. Introduction ....................................................................................................8
2.1 Functional Description ......................................................................8
2.2 Timing Theory ...................................................................................9
2.2.1 CCITT G.703 Signalling ..........................................................9
2.2.2 G.703 Codirectional Timing..................................................10
2.2.3 Tail-End Clocking ..................................................................14
2.2.4 G.703 Codirectional Rules.....................................................14
2.3 Rate-Conversion Rules .....................................................................16
2.4 Physical
Description .........................................................................16
3. Installation ....................................................................................................17
3.1 Unpacking
.......................................................................................17
3.2 Site Requirements...............................................................................17
3.3 Setting Jumpers...................................................................................17
3.3.1 Overview...................................................................................17
3.3.2 The Jumper-Setting Procedure ..............................................20
3.4 Installation in 19-Inch Racks ..............................................................20
3.4.1 Overview .................................................................................20
3.4.2 Installing a Single Unit in a 19-Inch Rack ............................21
3.4.3 Installing Two Units in a 19-Inch Rack.................................22
3.5 Connecting Power and Data Cables ..................................................24
3.5.1 Power Connection...................................................................25
3.5.2 G.703 LINE Connection .........................................................25
3.5.3 DTE Connection .....................................................................25
3.5.4 Async Secondary-Channel Connection..................................26
4. Operation.......................................................................................................27
4.1 Front-Panel Controls and LEDs .........................................................27
4.2 Operating Instructions .......................................................................29
4.2.1 Turn-On Procedure ................................................................29
4.2.2 Activating Loops......................................................................29
4.2.3 Turn-Off Procedure ................................................................29
4.3 Diagnostic Loops.................................................................................29
Appendix: Pinouts .............................................................................................31
