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TABLE OF CONTENTS
INITIAL SETUP
Introduction ................................................ 3
Packing List................................................. 3
Terms .......................................................... 3
420 Key Features ......................................... 4
420 Display ................................................. 6
Installing the Battery ................................... 6
INSTALLATION
Desk/Wall Mounting Bracket ....................... 7
Connecting the Telephone .......................... 7
Back Panel Connections .......................... 7
Side Panel Connections ........................... 7
Two RJ14 2- Line Telephone Jacks ......... 8
One RJ61 4-Line Telephone Jack ............ 8
INITIAL PROGRAMMING
To Enter the Program Mode ................... 10
To Exit the Program Mode ..................... 10
Setting the Language ................................ 10
Setting the Time and Date .........................10
Setting the Extension ID ........................... 11
Setting Message Waiting Indicator On/Off 11
PROGRAMMING OPTIONS
Turning the Ringers On or Off ................... 12
Change the Ringer Types .......................... 12
Setting the Delay Ring............................... 13
Programming the Line Usage .................... 14
Setting the Prime Line ............................... 15
Programming Line Groups/Private Line .... 16
Setting Auto-Mute ..................................... 17
Auto Intercom Answer ........................... 17
Setting Tone/Pulse Dialing ........................ 18
Changing the Flash Duration ..................... 18
Changing Hold Reminder .......................... 19
Programming Area Codes .......................... 19
Resetting the 420...................................... 20
TELEPHONE OPERATION
New Call/Message Waiting Indicator ......... 21
Voice Mail .................................................. 21
Turning the Message Waiting Indicator
Off .......................................................... 21
Line Status Indicators ............................... 22
Volume Control ......................................... 22
Off-Hook Volume ................................... 22
Ringer Volume ....................................... 22
Making Telephone Calls............................. 23
Prime Line ................................................. 23
Receiving Telephone Calls......................... 23
Receiving Call Waiting Calls ...................... 23
Transferring Calls ...................................... 24
To Transfer a Call ................................... 24
Answer a Transferred Call....................... 24
Hold........................................................... 24
To Place a Call on Hold .......................... 24
To Release a Call on Hold....................... 24
Mute .......................................................... 25
To Mute a Call ........................................ 25
To Release Mute .................................... 25
Flash/Feature ............................................. 25
Redial/Last Number Redial ........................ 25
Auto Redial ................................................ 25
3-Way Call Conferencing ........................... 26
Tone/Pulse Mixed Dialing .......................... 26
DND - Do Not Disturb ................................ 26
To Activate DND ..................................... 26
To Deactivate DND ................................. 26
Call Privacy - Extension Conferencing ....... 27
To Deactivate Call Privacy ...................... 27
To Restore Call Privacy .......................... 27
Paging and Intercom ................................. 27
Paging All Extensions................................ 27
Answering a System Wide Page ................ 27
Paging a Single Extension......................... 28
Answering a Single Extension Page .......... 28
Auto-Mute Off at Receiving Extension ... 28
Auto-Mute On at Receiveing Extension . 28