
NEC Australia Pty Ltd
Xen Master & Xen Axis
5 - 160
Installing Electronic Telephone Units
A6-3
240
00-6
42-
01 –
R
e
leas
e 4
.0
M
a
y
20
01
5.3.7
Connectors
The following connectors are located on the VDH2(8)-U13
ETU.
✆
CN1
Connects to the backboard.
✆
CN2 – CH1~7 Connects to Multiline Terminals.
✆
CN2
–
CH8
Connects to Multiline Terminal or
cascade connection to another HUB.
✆
CN3
Connects 10Base-2 cascade cables
from another HUB or mainframe LAN.
When SW2 is set to X, the following table indicates the pin
assignments for the RJ-45 pins for CN2 – CH8.
In the tables below, TD indicates Transmit Data and RD
indicates Receive Data.
When SW2 is set to =, the following table indicates the pin
assignments for the RJ-45 pins for CN2-CH8.
Note: Cables that connect a terminal to a HUB are straight, and
cables that connect HUB-to-HUB are crossed. Core line
uses straight cables only.
Table 5-11 Normal
Pin
Signalling
6
TD-
3
TD+
2
RD-
1
RD+
Table 5-12 Cascade
Pin
Signalling
6
RD-
3
RD+
2
TD-
1
TD+