28
Handset
Support hook
protection
Integrated, adjustable support hook protection
Handset cord
Steel-reinforced armoured cord
Earphone
Dynamic earphone with a stray field coil for the
inductive connection of hearing aid devices
Mouthpiece
Electret microphone
Noise cancellation
Over 3 dB with the integrated speaking funnel
Environmental conditions
Protection rating:
IP66 according to EN60529
Protection against
mechanical wear:
Protection rating IK09 according to EN50102
Operating
temperature:
-25°C to +60°C
Storage
temperature:
-25°C to +70°C according to IEC60721
Other characteristics
Disconnect button Separate button
Hook switch
Reed contact without a mechanical hook
Supply
- From the analogue phone network
- No additional power supply required
Call-charge impulse
lock
- Electrical damping for 12 kHz and 16 kHz at
the earphone of over 30 dBr related to 1 kHz
- Impedance (at the phone connections A, B):
approx. 13 k
Ω
( 1 V
eff
; 12 kHz ; idle state)
approx. 4 k
Ω
(10 V
eff
; 12 kHz ; idle state)
approx. 2.5 k
Ω
( 1 V
eff
; 12 kHz ; conversation state)
approx. 2.3 k
Ω
(10 V
eff
; 12 kHz ; conversation state)
approx. 11 k
Ω
( 1 V
eff
; 16 kHz ; idle state)
approx. 4 k
Ω
(10 V
eff
; 16 kHz ; idle state)
approx. 2.5 k
Ω
( 1 V
eff
; 16 kHz ; conversation state)
approx. 2.3 k
Ω
(10 V
eff
; 16 kHz ; conversation state)
Ring tone volume
- approx. 90
dB(A) in 1 m distance at 50 V
AC
/ 50 Hz
In the deliver state setting. (The maximum
volume depends also on the selected tune and
the feedingconditions.)
- 6 levels can be selected including muted
(The ring tone volume is reduced by approx.
12 dB(A) when the optional external speaker is
turned on.)
Ring tone tunes
10 tunes can be selected
Speaker volume for
open listening
- maximum volume is approx. 68 dB(A) at 1 m distance
- 7 levels can be selected permanently or temporarily
(The speaker volume is reduced if the
optional external speaker is connected.)