Keyboard *)
Position of
operation
Protection Class I
Protection Class II
Handset
Sling protection
Handset cord
Earphone
Microphone
capsule
Noise suppression
Ambient conditions
Protection type:
Protection against
external
mechanical impacts
Operating
temperature:
Storage
temperature:
Additional features
Clearing key *)
Hook switch
Power supply
Meter-pulse lock
Optical call *)
signalling
- Metal keyboard with protection against ice.
- 21 keys with ABC inscription for name entries.
Mounted upright on the wall. The device must be
mounted on a plane surface only.
M20 x 1.5 sealing plug or threaded 1/2" NPT
adapter for cable entry assembly.
Plastic cable entry
Integrated, adjustable sling protection.
Steel-reinforced steel-clad cord.
Dynamic capsule with stray-field coil for the
inductive connection of hearing-aids.
Electret microphone
Greater than 3 dB by integrated speak-in horn.
IP 66 as per EN60529
IK 09 as per EN50102
-25°C to +60°C
(display does not operate below -20°C)
-25°C to +70°C as per IEC60721
Separate key
Dry reed contact without a mechanical cradle
- from the analogue telephone network.
- no additional mains supply required.
- 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 k ( 1 V
approx.
4 k (10 V
approx. 2.5 k ( 1 V
approx. 2.3 k (10 V
approx. 11 k ( 1 V
approx.
4 k (10 V
approx. 2.5 k ( 1 V
approx. 2.3 k (10 V
Display indicates ( ( (
; 12 kHz ; idle state)
eff
; 12 kHz ; idle state)
eff
; 12 kHz ; during a call)
eff
; 12 kHz ; during a call)
eff
; 16 kHz ; idle state)
eff
; 16 kHz ; idle state)
eff
; 16 kHz ; during a call)
eff
; 16 kHz ; during a call)
eff
) ) )
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