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4-1
4. OPTIONAL DEVICES
4.1 Analog Telephone FC755D1
Note: If a different telephone is used it must satisfy the requirements shown below.
Item Specification Standard
On hook voltage 49 VDC (no load) ETSI, JAPAN
Ringer frequency 20 Hz JAPAN, ANSI
Ringer pattern 2 s ON/4 s OFF ANSI
Ringer voltage 65 Vrms (no load) ETSI, JAPAN
Off hook detection voltage 10 mA ETSI
Off hook group voltage 24 mA (300 ohm load) ETSI, JAPAN
2 W impedance 600 ohms JAPAN
RING TONE lamp:
Lights when calling;
blinks when holding a call.
ONE-TOUCH DIAL keys:
Register/dial abbreviated dialing
numbers.
Change the ring tone and ring
pattern.
Display: Shows number being dialed,
settings, etc.
VOLUME key:
Adjusts volume of ring, or volume of receiver
when speaking.
RCV lamp:
Blinks when call is received.
ONE-TOUCH DIAL keys:
Register/dial abbreviated dialing
numbers.
Numeric, symbol keys:
0-9: Manually dial telephone number.
*: Enables hold, forward, and
intercom functions.
#: End code
HOLD key: Holds call.
HOOK key: Starts/cancels forwarding.
REDIAL key: Redials subscriber last dialed. Also used in to insert a
pause when registering one-touch dialing numbers.
key (SPEAKER key): Allows you to dial telephone
number with handset on hook.
FUNCTION key: Registers/dials abbreviated dialing numbers.