MEDC Ex ResistTel MB - Manual (Page 29)

29
Keypad - Metal keypad protected against icing
- 21 keys with the appropriate inscription
Operating position Vertical wall-mounted. The device can be installed
only on a level surface.
Handset
Support hook
protection
Integrated, adjustable support hook protection
Handset cord Steel-reinforced armoured cord made of stainless
steel
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 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 ; conversation state)
approx. 2.3 kΩ (10 V
eff
; 12 kHz ; conversation state)
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 ; conversation state)
approx. 2.3 kΩ (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.)