User Manual

MDS 05-4670A01, Rev. E SD Series Reference Manual (x710 Mode) 17
COM2 PORT NOTES:
• RXD+ / RXB and RXD– / RXA are data sent to the radio to be transmitted
• RXD+ / RXB is positive with respect to RXD– / RXA when the line input is a “0”
• TXD+ / TXB and TXD– / TXA are data received by the radio and transmitted
• TXD+ / TXB is positive with respect to the TXD– / TXA when the line output is a “0”
Invisible place holder
Figure 15. EIA-422/485 Wiring Arrangements
4.8 Ethernet Interface (RJ-45)
In x710 mode, the transceiver’s Ethernet Port is used for radio manage-
ment only. The port has built-in MDIX (auto-sensing) capability,
allowing either a straight-through or crossover cable to be used.
Figure 16 and Table 9 show pinout data for the Ethernet port.
The Ethernet port can be used to support Telnet or web-based radio
management. Telnet provides the same user interface available with
COM1 .
Figure 16. Ethernet Port (RJ-45) Pinout
(As viewed from the outside of the unit)
Table 9. Ethernet Port (IP/Ethernet) Pinouts
Pin Functions Ref.
1 Transmit Data (TX) High
2 Transmit Data (TX) Low
3 Receive Data (RX) High
4 Unused
5 Unused
6 Receive Data (RX) Low
7 Unused
8 Unused
EIA-485 2-WIRE CONNECTIONS
TXD 
RXD 
2
3
7
RADIO
DATA CONNECTOR
8
RXD +
TXD +
EIA-422 4-WIRE CONNECTIONS
RXD/TXD
2
3
7
RADIO
DATA CONNECTOR
8
RXD+/TXD+
EXTERNAL DEVICE EXTERNAL DEVICE
RXD +
TXD 
RXD 
TXD +
RXD +
TXD 
RXD 
TXD +
This jumpering must be provided by user.
8
12
3
4
56
7