025-9567E v
Table of Contents
INTRODUCTION
OVERVIEW ........................................................................................................1
FRONT PANEL DESCRIPTION........................................................................1
Display .....................................................................................................2
Keypad .....................................................................................................3
Extended Keys .........................................................................................3
Instant Call Buttons..................................................................................4
SPECIFICATIONS
GENERAL ...........................................................................................................5
ELECTRICAL .....................................................................................................6
SPECIAL FEATURES ........................................................................................7
OPERATION
OVERVIEW ........................................................................................................9
POWER ON .........................................................................................................9
USING THE KEYPAD .......................................................................................10
The Keyboard Stack .................................................................................11
Clearing an Entry .....................................................................................11
Sending a Call ..........................................................................................11
Sending Live Calls ...................................................................................12
Generating Alerts .....................................................................................12
Displaying the Time .................................................................................13
Accessing the Call Stack ..........................................................................13
MAKING INSTANT CALLS .............................................................................13
Instant Call Key Numbering ....................................................................14
REMOTE CONTROL OPERATION..................................................................16
Call Logging ............................................................................................17
SETTING THE CLOCK ......................................................................................19
CAUSES FOR ERROR BEEPS ..........................................................................20
THE CALLING SEQUENCE .............................................................................22
The Control Relays ..................................................................................22
Channel Busy Monitoring ........................................................................22
Keying Method ........................................................................................23
Calling Sequence Summary .....................................................................24
RELAY TIMING DIAGRAM .............................................................................28
ENCODER INSTALLATION
OVERVIEW ........................................................................................................29
INSTALLATION PRECAUTIONS ....................................................................29
RFI Caution ..............................................................................................29
Proper Grounding of the Model 25 ..........................................................29
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