metal keypad with ice protection/ 21 keys with ABC lettering for name entries
Weight
~ 5,5 kg
Receiver
integrated, adjustable stabilizer bracket
Handset cord
stainless steel armoured handset courd V4A
Receiver inset
dynamic receiver with leakage field spool for inductive coupling of hearing aids
Mouth piece
electret microphone
Noise suppression mouth
> 3 dB due to integrated mouthpiece horn
Terminal data
Approval
DMT 03 ATEX E 034
Protection class
IP 66 (EN 60529)
Impact protection
IK 09 (EN 50102)
Line voltage
24 - 66 V DC
Line current
0,015 - 0,10 A DC
Ringing alternating current
24 - 90 V AC (at 21 ... 54 Hz ringing frequency) 30 - 90 V AC (at 16,6 ... 54 Hz ringing frequency)
Ringing impedance
> 6,0 KΩ at 25 Hz and 24 ... 90 V AC > 4,0 KΩ at 50 Hz and 24 ... 90 V AC
Inquiry key
flash function adjustable from 40 ms - 399 ms
Dialling procedure
PD-DTMF operation to be set in the menu DTMF operation according to CCITT recommendation Q.23PD operation - pulse/pause ratio can be set to 1,5:1 or 2:1 in the menu