Hughes 9450 Series, Руководство по установке, Страница: 13 / 31

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Introduction
3004129 Revision A
3
IEEE 802.3af standard (48 Vdc up to 15.4 W) and 10/100BaseT
Ethernet. The pinout of the ports supports a direct
straight-through connection to a PC with a standard Ethernet
cable. Table 2, shows the pinout of the Ethernet connector.
Table 2. RJ-45 Ethernet port pinout
Pin
1 RX+
2 RX-
3 TX+
4 NC
5 NC
6 TX-
7 NC
8 NC
Note: The +48 V and -48 V are supplied over the TX, RX pairs.
They are only active when an 802.3af compliant device is
plugged in. The other pairs (4, 5, 7, and 8) are unused.
The total power supplied by the PoE is limited to 30.8 W
maximum for 12 V installations and 61.6 W maximum for 24 V
installations. The IDU automatically detects the class of the
device plugged in and will apply power such that the total cannot
exceed these limits. If the user attempts to connect a combination
of devices that require more than this, the IDU will not power
any devices that would cause the limit to be exceeded.
Note: Class 4 (802.3at) PD devices are not supported.
ISDN port
There is one ISDN port on the IDU. It provides 4 kbps voice,
3.1 kHz audio, and 64 kbps data communication. The following
table lists the pinout of the ISDN connector.
Table 3. ISDN port pin out
Pin
1 NC
2 NC
3 ISDN RX+(+40 V)
4 ISDN TX+(-40 V)
5 ISDN TX-(-40 V)
6 ISDN RX-(+40 V)
7 NC
8 NC