Mitel 470 System Manual page 132

Installation
6) The value applies to each interface and to radio units with hardware version "-2". The value per interface for
radio units with hardware version "-1" is 150 mW lower.
7) The value applies to phones with hardware version "-2". The value for phones with hardware version "-1" is
60 mW lower.
The two diagrams below show the power available on the DSI-AD2 bus in relation to
the line length and the wire diameter. The table can then be used to determine the
number and type of system phones that can be connected to the DSI-AD2 bus under
the given conditions. The power available can be calculated by measuring the loop re-
sistance where the wire diameter is known.
Due to the different hardware versions of the radio units, the power available on the
DSI-AD2 bus is not the same in every case:
Power available A:
• Applies to all the system phones of the MiVoice 5300 series and the Office series.
• Applies to the SB-4+/SB-8 DECT radio units with hardware version "-1".
3000
2900
2800
2700
2600
2500
2400
2300
2200
2100
Pmax [mW]
2000
1900
1800
1700
1600
1500
1400
1300
1200
R [Ohm]
1100
1000
900
800
700
600
500
Fig. 47 Power available A on the DSI-AD2 bus
Power available B:
Applies to the SB-4+/SB-8 DECT radio units with hardware version "-2" and system
phones of the Dialog 4200 series.
132
d=0.6mm
d=0.5mm
d=0.4mm
d=0.4mm
d=0.5mm
d=0.6mm
Line length L [m]
500
480
d: Wire diameter
460
d = 0.6 mm
440
d = 0.5 mm
420
d = 0.4 mm
400
380
360
340
320
300
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0
Mitel 470 as of R4.1
syd-0585/1.2 – R4.1 – 08.2016