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2.5 Connections
2.5.1 Bottom panel connections
Ethernet port
The 915U-2 modules provides a standard RJ-45 Ethernet port compliant to IEEE 802.3
10/100 BaseT. This port provides full access to the module, including configuration,
diagnostics, log file download and firmware upload, of both the local and remote units.
Additionally the Ethernet port can provide network connectivity for locally connected
third-party devices with Ethernet functionality.
USB Device Port for configuration
The 915U-2 module also provides a USB-device (USB-B) connector. This connector
provides configuration of the device and remote configuration access to other devices in
the radio network.
RS-232 port
The 915U-2 module provides an RS-232 serial port, which support operations at data
rates up to 230,400 baud. This port supports MODBUS protocol.
The RS-232 port is provided by an RJ-45 connector wired as a DCE according to EIA-
562 Electrical Standard.
RJ-45
Signal
1
RI
2
DCD
3
DTR
4
GND
5
RXD
6
TXD
7
CTS
8
RTS
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Figure 9 – Bottom Panel Connections
Required
Signal name
Ring Indicator
Data Carrier Detect
Y
Data Terminal Ready
Y
Signal Common
Y
Receive Data (from Modem)
Y
Transmit Data (to Modem)
Clear to Send
Request to Send
915U-2 Wireless I/O
Connector
915U-2 Wireless I/O
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