VI
Table of Contents
Customer Service........................................................................................................................................................ ii
Conventions used in this manual............................................................................................................................... xi
1 INTRODUCTION........................................................................................................1
1.1 System overview- What is this TWOx12 Anyway?................................................................................ 1
1.2 Features and Benefits of the TWOx12 System........................................................................................ 1
1.3 Why ISDN Makes Sense for Broadcast Talk Show Systems ................................................................2
2 INSTALLATION......................................................................................................7
2.1 Getting Started............................................................................................................................................. 7
System Configuration –........................................................................................................................ 8
Identifying your TWOx12 system – Analog or Digital? .................................................................... 9
2.2 Installation checklist (Copy this checklist and use it to help organize your installation)..11
2.3 ISDN Technology 101................................................................................................................................13
2.4 Ordering ISDN – an introduction........................................................................................................... 14
2.5 Connections to the Telco circuits.............................................................................................................17
Introduction – Choices........................................................................................................................ 17
2.5.1 Connecting the Telos TWOx12 to ISDN)..........................................................................................18
ISDN in USA & Canada: Using the U Interface...............................................................................20
ISDN Worldwide (outside the USA & Canada): The S/T Interface............................................22
2.5.2 Integration with a PBX using ISDN ................................................................................................... 24
2.5.3 Connecting the TWOx12 to POTS (Plain Old Telephone Service)............................................... 25
2.5.4 Mixed ISDN/Analog Configurations..................................................................................................27
2.6 Studio Audio Connections........................................................................................................................ 30
2.6.1 Mix-Minus..............................................................................................................................................30
What is a mix-minus? ......................................................................................................................... 30
Why do I need a mix-minus?..............................................................................................................32
More on Mix-Minus............................................................................................................................ 32
Phones and Remotes...........................................................................................................................34
2.6.2 Input- (To Caller ) Left & Right Analog Audio.................................................................................35
2.6.3 POH (Program on Hold) Input ...........................................................................................................36
2.6.4 Output – (Caller) Left & Right Audio................................................................................................ 37
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