Daisy-chain connection
L1
ATUC-50DU
NOTICE
• For a 50CU-50DU-50DU-...50DU-EXT connection, the distance between the [50DU-EXT] is L1.
• W hen it is EXT-50DU-...-50DU-50DU-, the distance for [EXT-50DU] is L3.
Relationship of the LAN cable length, number of units connected and number of EXTs required: Daisy-chain
connection
Length of cables
50CU-
50DU-
50DU
50DU
L1
L2
10 m
1.5 m
50 m
1.5 m
100 m
1.5 m
10 m
2.0 m
50 m
2.0 m
100 m
2.0 m
10 m
5.0 m
50 m
5.0 m
100 m
5.0 m
ATUC-50CU
L2
L2
1-port daisy-chain
connection
(using DUs)
EXT-50DU
Number of
50DUs
connected
L3
1 to 45 units
10 m
46 to 50 units
1 to 36 units
10 m
37 to 50 units
1 to 24 units
10 m
25 to 50 units
1 to 29 units
10 m
44 to 50 units
1 to 34 units
10 m
35 to 50 units
1 to 24 units
10 m
25 to 50 units
1 to 33 units
10 m
34 to 50 units
1 to 27 units
10 m
28 to 50 units
1 to 20 units
10 m
21 to 48 units
L2
L1
ATLK-EXT165
1-port daisy-chain
connection
(using IUs)
Number of
Number of
EXTs
IUs
needed
connected
0 units
1 to 30 units
1 unit
31 to 45 units
0 units
1 to 24 units
1 unit
25 to 39 units
0 units
1 to 16 units
1 unit
17 to 33 units
0 units
1 to 27 units
1 unit
28 to 43 units
0 units
1 to 23 units
1 unit
24 to 37 units
0 units
1 to 16 units
1 unit
17 to 33 units
0 units
1 to 25 units
1 unit
26 to 39 units
0 units
1 to 20 units
1 unit
21 to 34 units
0 units
1 to 14 units
1 unit
15 to 30 units
30
L3
L2
1-port daisy-chain
connection
(using 50DUa + VUs)
Number of
Number of
50DUa
EXTs
+ VUs
needed
connected
0 units
1 to 32 units
1 unit
33 to 49 units
0 units
1 to 26 units
1 unit
27 to 42 units
0 units
1 to 17 units
1 unit
18 to 36 units
0 units
1 to 31 units
1 unit
32 to 48 units
0 units
1 to 25 units
1 unit
26 to 41 units
0 units
1 to 17 units
1 unit
18 to 36 units
0 units
1 to 26 units
1 unit
27 to 42 units
0 units
1 to 21 units
1 unit
22 to 38 units
0 units
1 to 15 units
1 unit
16 to 34 units
L2
Number of
EXTs
needed
0 units
1 unit
0 units
1 unit
0 units
1 unit
0 units
1 unit
0 units
1 unit
0 units
1 unit
0 units
1 unit
0 units
1 unit
0 units
1 unit