Telex 38109-977 manual Before We Begin, Matrix

Figure 1.5 Complex Matrix Intercom System

MATRIX

Analog

Audio

Third Party

Terminal

Equipment

Audio IN,

Audio OUT,

Data

1

2

3

DIR

PROD

RA

PL01

IFB4

TD

AD

NEWS

T1

TEL1

TEL2

FLOR

CHYR

ISO1

ISO2

AUD1

4

5

6

7

8

9

0

Keypanel

LAN / WAN

Third Party

Terminal

Equipment

Email

System

News

Computers

Audio IN,

Audio OUT,

Data

Third Party									1	2	3
Terminal	DIR PROD RA PL01	IFB4	TD AD NEWS T1	TEL1	TEL2	FLOR CHYR ISO1	ISO2	AUD1	4	5	6
									7	0	9
										8
Equipment

Keypanel

In many cases, connection to “the telephone company” is required to allow a reporter to connect into an intercom from his or her cell phone, or to allow a return program feed to be fed to a remote location. A telephone interface (TIF) unit provides this connectivity.

The most basic accessory in an Intercom system may be the headset. It may provide isolation from ambient noise; it may have a noise-canceling microphone to reduce wind noise, and may have stereo ear pieces to allow program audio and intercom audio to be fed independently to the right and left ears.

Each of these accessories is vital to creating an intercom system that meets the communications needs of the users.

Before We Begin

Throughout this book, you will be subjected to the jargon that permeates the intercom world. In the chapters that follow, you will be presented with definitions specific to the topic being covered. In many cases, there are common terms that will be applicable to all these chapters, and so we will present a few definitions to get us started. We have also provided a comprehensive glossary in the rear of the book.

IFB

Interrupted Fold Back – also referred to as IRF – Interrupted Return Feed. The best way to explain this is to give an example. A news reporter is on the scene of live accident coverage. She needs to not only hear what the anchor back at the studio is saying i.e., “So, Jane, how many chickens were injured when they tried to cross the road during rush hour?” She also needs to hear instructions from the director back in the studio i.e., “Wrap it up, 10 seconds.” The IFB function in an intercom system allows a single audio signal to be sent to Jane, normally containing program audio interrupted by instructions or information from someone not a part of the program audio.

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