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Interfaces of the GMU
3.2.4
LAN connectors (8 + 2)
The GMU has 8 Ethernet connectors (type RJ45). Port 1 connects to the ACU and is used
for modem control. The other ports are not used. The maximum cable length per
connection is 100 m. The Ethernet cable type must be CAT5, shielded. For outline and
pin allocation see figure 3-7 on page 3-5.
Figure 3-4: LAN connectors at the GMU, Port 1 (modem control) connects to the ACU
3.2.5
I/O connector for Tx Mute and Rx Lock
The GMU has one I/O connector for Tx Mute and Rx Lock.
Outline (on the GMU)
1
Table 3-11: I/O connector, outline and pin assignment, GMU
3-8
Port 1
Port 2
Port 3
Port 5
Port 6
Port 7
Pin
1
GND
2
Not connected
3
Rx Lock out
4
Tx Mute in
4
Port 4
Port 9
Port 8
Port 10
Pin function
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