Each octopus cable connects 8 xyplex MX1620 terminal server ports to to a patch panel or 8-port harmonica with 6-wire 6-position RJ11 jacks. The patch panel or harmonica must be USOC-wired and have a male Telco connector, since this cable has a female Telco connector. This same wiring presumably works for all other xyplex terminal servers with RJ45 jacks.
If you wish to use hardware flow control then configure the xyplex for CTS/RTS handshaking.
Each octopus consists of:
Each leg is four feet (4') long unless otherwise specified. The wiring is as follows. Use of twisted pair wire is optional, but if it is used, it must be used as shown in the table.
RJ45 Pin
Female Telco Connector Pin
Leg #1
Leg #2
Leg #3
Leg #4
Leg #5
Leg #6
Leg #7
Leg #8
twisted pair
3
27
30
33
36
39
42
45
48
4
1
7
10
13
16
19
22
5
26
29
32
35
38
41
44
47
6
2
8
11
14
17
20
23
28
31
34
37
40
43
46
49
9
12
15
18
21
24
RJ-45 pins 2 and 7 must not be connected to anything. Telco pins 25 and 50 are also not connected.
The octopus wiring is derived from the table below, as follows:
RJ11 Pin
Signal
Telco Connector Pin
Tx
...
Tx Gnd
Rx Gnd
Rx
Tx Flow
Rx Flow
