Installation
124
Mitel SMB Controller
syd-0657/2.0 – R6.0 – 09.2018
Restrictions
The maximum length of an DSI-AD2 bus is further restricted by:
• the maximum power requirements of the connected system phones and their sup-
plementary equipment. In this context the SB-4+ and SB-8 DECT radio units are
also considered as system phones.
• the line resistance (depending on the line length and wire diameter)
Tab. 51
Maximum power requirements of the system phones on the DSI bus
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.
System phone
1)
1) Assumptions:
System phones: In hands-free mode, loudspeaker on maximum volume, all LEDs lit
MiVoice 5380: Backlighting with maximum brightness
Expansion key modules: All LEDs lit
Radio units: Active call connection on all channels
Socket
Max. power input
[mW]
MiVoice 5360
2)
2) Although no longer available, the phone is still supported.
DSI-AD2 interface
900
MiVoice 5361
DSI-AD2 interface
1220
MiVoice 5370
DSI-AD2 interface
1220
3)
3) The value can increase to approx. 600 mW if the power available at the DSI-AD2 bus allows it.
MiVoice 5380
DSI-AD2 interface
1340
MiVoice 5370, MiVoice 5380 with power supply unit
DSI-AD2 interface
0
Expansion key module MiVoice M530
MiVoice 5370
300
Expansion key module MiVoice M530
MiVoice 5380
500
Expansion key module MiVoice M535
MiVoice 5370, MiVoice 5380
0
4)
4) An MiVoice M535 always requires a power supply unit
Dialog 4220 DSI-DASL
interface
500
Dialog 4222 DSI-DASL
interface
660
Dialog 4223 DSI-DASL
interface
680
EKP expansion key module
Dialog 4222, Dialog 4223
190
DECT radio unit without power supply unit SB-4+
DSI-AD2 interface
1700
5)
5) The value applies to radio units with hardware version "-2". The value for hardware version "-1" is 300 mW
lower.
DECT radio unit without power supply unit SB-8
2 DSI-AD2 interfaces
1550
6)
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.
DECT radio unit with power supply unit SB-4+/SB-8
1 or 2 DSI-AD2 interfaces
< 100