Le Las 227A1AT, User Manual, Page: 36 / 64

NFC227A*TEL2
36 /64
\\SERVEUR MAX\\ Notices NFC \ NFC227 TL2 \ NFC227A-TEL2.DOC
1.5 TECHNICAL FEATURES OF THE SERIES 227A1 TELEPHONES
The telephones operate without any modification to the PSTN lines. For perfect operation with a switch, it is
necessary to ensure that the following characteristics match those of the switch.
In a case of incompatibility, special software can be provided. Contact the manufacturer for more
information.
•
Ringing voltage
Ringing duration = 1.5s + 0.5s
Pause duration: 3s + 2s
> 35 V
eff
< U sonnerie < 80V
eff
CA 25 ou 50Hz
Imax = 0.05 A
eff
; Pmax = 1W
•
Current in the telephone (off-hook position
35mA (20Ma minimum)
Imax = 0.08A
DC
; Pmax = 1.2W
•
Voltage on the telephone terminals
(on-hook position)
48V (24V minimum) Umax = 60V
DC
•
Dialling system
DTMF or pulse
•
Dialling tone
Frequency: 270Hz to 540Hz
Detection time min 2 sec
•
Busy tone
Sequence of beeps and pauses for more
than 10 seconds
Beep: 100ms to 600ms
Pause: 100ms to 600ms
Frequency: 300Hz to 500Hz
Detection time 4-10sec
Must be equal to beep value
•
Remote Ringing Tone Return
Sequence of beeps and pauses until off-
hook
Beep: 0.2 sec to 1,6 sec.
Beep + Pause: <6 sec
Frequency: 350Hz to 500Hz
•
Cleardown Tone
Sequence of beeps and pauses for more
than 10 seconds
Beep: 100ms to 600ms
Pause: 100ms to 600ms
Frequency: 300 to 500Hz
Detection time 4-10 sec
Must be equal to beep value
1.6 SPECIAL CONDITIONS OF USE
227A1 telephone set should be connected on a network line with the following particulars :
Ø
Maximum voltage of use : Umax. = 60Vdc
Ø
Maximum delivered current : Imax. = 80mA
Ø
Maximum delivered power : Pmax. = 1.2W