3
SEE MARKING ON BOTTOM / BACK OF PRODUCT
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: TO
PREVENT FIRE OR
ELECTRICAL SHOCK
HAZARD, DO NOT
EXPOSE THIS
PRODUCT TO RAIN
OR MOISTURE.
THE LIGHTNING
FLASH AND ARROW
HEAD WITHIN THE
TRIANGLE IS A
WARNING SIGN
ALERTING YOU OF
“DANGEROUS
VOLTAGE” INSIDE
THE PRODUCT.
CAUTION: TO REDUCE THE
RISK OF ELECTRIC SHOCK, DO
NOT REMOVE COVER (OR
BACK). NO USER
SERVICEABLE PARTS INSIDE.
REFER SERVICING TO
QUALIFIED SERVICE
PERSONNEL.
THE EXCLAMATION
POINT WITHIN THE
TRIANGLE IS A
WARNING SIGN
ALERTING YOU OF
IMPORTANT
INSTRUCTIONS
ACCOMPANYING
THE PRODUCT.
CAUTION:
Table of Contents

IMPORTANT INFORMATION........................................................ 2

EQUIPMENT APPROVAL INFORMATION............................................................. 2
INTERFERENCE INFORMATION........................................................................ 2

INTRODUCTION....................................................................... 5

CONNECTIONS & SETUP.......................................................... 6
PARTS CHECKLIST................................................................................................... 6
TELEPHONE JACK REQUIREMENTS............................................................................. 6
BASE LAYOUT......................................................................................................... 7
IMPORTANT INSTALLATION INFORMATION......................................................... 8
IMPORTANT INSTALLATION GUIDELINES......................................................................8
INSTALLING THE PHONE........................................................................................... 9
DATA PORT............................................................................................ 12
SYSTEM VERIFICATION ..............................................................................12
OTHER SYSTEM PHONES...................................................................................... 13
PROGRAMING THE TELEPHONE.................................................................... 13
LANGUAGE.......................................................................................................... 13
RINGER TONE...................................................................................................... 13
PRIORITY LINE..................................................................................................... 14
DELAY RING........................................................................................................ 15
PHONE ID ..........................................................................................................15
PHONE NAME..................................................................................................... 16
INTERCOM AUTO ANSWER.................................................................................... 16
FLASH TIME ........................................................................................................17
CALL ALERT TONE ...............................................................................................17
NO UNKNOWN/BLOCKED (NOT APPLICABLE TO MODEL 25403.)........................... 18
DISPLAY CONTRAST.............................................................................................. 18
LOCAL AREA CODE (NOT APPLICABLE TO MODEL 25403.).................................... 19
REGIONAL AREA CODES (NOT APPLICABLE TO MODEL 25403.)............................. 19
MANUALLY SETTING THE TIME AND DATE.............................................................. 20
HOUR FORMAT.................................................................................................... 21
RESTORING THE DEFAULT SETTINGS....................................................................... 21

OPERATION........................................................................ 22

BASIC OPERATION ...................................................................................22
MAKING CALLS WITH THE HANDSET..................................................................... 22
MAKING CALLS WITH THE SPEAKERPHONE............................................................. 22
MAKING CALLS WITH THE OPTIONAL HEADSET...................................................... 23
PRE-DIALING....................................................................................................... 23
ANSWERING CALLS.............................................................................................. 23
SWITCHING BETWEEN THE SPEAKERPHONE, HANDSET, AND HEADSET...................... 24
MUTE................................................................................................................. 24
DO NOT DISTURB................................................................................................ 25
HOLD.................................................................................................................. 25
Placing a Call on Hold........................................................................................ 25
Releasing a Call..................................................................................................... 25