FHF Resistel - Page 24

24
Position of
operation
Mounted upright on the wall. The device must be
mounted on a plane surface only.
Handset
Sling protection Integrated, adjustable sling protection.
Handset cord Steel-reinforced steel-clad cord made of V4A.
Earphone Dynamic capsule with stray-field coil for the
inductive connection of hearing-aids.
Microphone
capsule
Electret microphone
Noise suppression Greater than 3 dB by integrated speak-in horn.
Ambient conditions
Protection type: IP 66 as per EN60529
Protection against
external
mechanical impacts
IK 09 as per EN50102
Operating
temperature:
-25°C to +60°C
(display does not operate below -20°C)
Storage
temperature:
-25°C to +70°C as per IEC60721
Additional features
Clearing key *) Separate key
Hook switch Dry reed contact without a mechanical cradle
Power supply - from the analogue telephone network.
- no additional mains supply required.
Meter-pulse lock
- Electrical attenuation for 12 kHz and 16 kHz
on the earphone greater than 30 dB with respect
to 1 kHz.
- Impedance (telephone connections A, B):
approx. 13 kΩ ( 1 V
eff
; 12 kHz ; idle state)
approx. 4 kΩ (10 V
eff
; 12 kHz ; idle state)
approx. 2.5 kΩ ( 1 V
eff
; 12 kHz ; during a call)
approx. 2.3 kΩ (10 V
eff
; 12 kHz ; during a call)
approx. 11 kΩ ( 1 V
eff
; 16 kHz ; idle state)
approx. 4 kΩ (10 V
eff
; 16 kHz ; idle state)
approx. 2.5 kΩ ( 1 V
eff
; 16 kHz ; during a call)
approx. 2.3 kΩ (10 V
eff
; 16 kHz ; during a call)
Optical call *)
signalling
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