Installation
115
Aastra 415/430 as of R3.2
syd-0344/1.6 – R3.2 – 09.2014
DSI bus configuration
Depending on the line length, 1 or 2 system phones of the Aastra 5300
1)
series can
be connected on each DSI-AD2 interface. The following requirements apply with
regard to the bus length to ensure that the maximum permissible signal delay is
not exceeded:
Tab. 51
DSI-AD2 bus length and number of phones
Fig. 42
DSI-AD2 bus
Notes
The total length of the cables from the communication server to the sys-
tem phone must not be less than 10 m.
Restrictions
The maximum length of an DSI-AD2 bus is further restricted by:
• the maximum power requirements of the connected system phones and their
supplementary 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)
1)
Office 10, Office 25, Office 35, Office 45/45pro are supported as before
Number of phones
Total length of DSI-AD2 bus
Distance between the 1st and 2nd ones Con-
nection point (without connection cable)
1
A: max. 1200 m
–
2
B: max. 1200 m
C: max. 10 m
A
B
C
2. Connection
point
1. Connection
point
1. Connection
point
Communica-
tion server
Communica-
tion server
