Mitel Aastra 470 System Manual page 133

5)
The value applies to radio units with hardware version "-2". The value for hardware version "-1" is 300 mW
lower.
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 resistance 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 Aastra 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
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014
d=0.6mm
d=0.5mm
d=0.4mm
d=0.4mm
d=0.5mm
d=0.6mm
Line length L [m]
Installation
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
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