Aria-130 Digital Key Telephone System
Issue: 1.2
Installation Manual
98
Figure 3.5.4.b Basic connection method between digital terminal
interface of the system and digital terminal
Note:
1. Digital terminals operate regardless of line polarity, not with a fixed polarity.
2. Each area means the followings,
A
: LDK system,
B
: between the LDK system and MDF,
C
: cable in building,
D
: between Terminal connection point, e.g. terminating adapter and Terminal,
E
: digital terminals
3. DTIB12 is capable of connecting to up to 12 digital terminals.
DTIB24 is capable of connecting to up to 24 digital terminals.
DSIB is capable of connecting to up to 6 digital terminals.
Connection method with special condition between the digital interfaces and the digital terminals
Only two-wire connection between the digital terminal interface and digital terminals is
recommended to reduce the line noise exited from useless wires
. Because R and R1/T and T1 are
connected together in the terminals for various national conditions, the useless wires can cause the
environment noise, which may affect the data transmission, to flow in the digital terminal the 4-wire line
cord is used.
In this case, cut or remove the useless wires connected the contact number R1 and T1 (or, R and
T) of the terminals at the Terminal connection point, e.g. terminating adapter, so that those are not
drawn out any more.
MD
F
1
2
3
4
5
6
ARI
A
-13
0 D
T
IB
1
2/
D
T
IB
24/
D
S
IB
RJ21 type
connector
on the board
1
26
2
27
3
28
4
29
DT1
DR1
DT2
DR2
DT3
DR3
Area
A
Area
B
Area
C
Area
D
Area
E
