User guide
Doortel 4
Issue 1.01
Page 14
Power supply
from telephone line
Telephone line voltage
min. 24 Vdc, max. 60 Vdc
Voltage insertion drop on T/R
10 V +/- 5% at 25 mA
Current consumption
off hook: min. 18 mA
stand-by: 2 µA
Telephone line impedance
600 Ohm
Dial mode
rotary dial, DTMF selectable
Rotary dial
impulse frequency: 10 Hz
dial pause: 820 ms
impulse duration: 60 ms
impulse pause: 40 ms
open line resistance: > 300 KOhm
DTMF dial
standard DTMF
Tone duration: 70 ms
Tone pause: 70 ms
Tone recognition
detectable tone frequency: 390 to 480 Hz
detectable ringback tone: tone duration from 770 to
1100 ms. Release after 7/8
tones
detectable long busy tone: tone duration from 170 to
550 ms. Release after 5/6
tones
detectable short busy tone: tone duration from 70 to
150 ms. Release after 10/11
tones
Dooropener
Contact 1: DTMF digit "7"
Contact 2: DTMF digit "8" (optional)
Min. detectable DTMF tone duration: 45 to 50 ms
Max. contact load: 40 Vpp, 2 A
Closure duration: 1 to 9 second programmable
Time out
1, 2 or 4 minutes selectable
Enviromental themperature
0° to 45° C
EMC
EN 60555-2
EN 55022
EN 50082-1
Security
EN 60950
Dimensions
DOORTEL 4 MD
Frontplate: 124 x 213 x 19
Installation box: 124 x 213 x 55
Wall mounting case: 151 x 232 x 80
DOORTEL 4 AV
Frontplate: 100 x 316 x 4
Installation box: 90 x 305 x 55
Wall mounting case: 105 x 326 x 62
DOORTEL 4 ES
Frontplate: 123 x 215 x 14
Installation box: 115 x 207 x 45
Wall mounting case: 142 x 232 x 90
DOORTEL 4 BG
Electronic board: 82 x 150 x 25
Loudspeaker holder: 75 x 75 x 28
Technical data
