User's Manual

RX INN Installation Guide Page: 13
Antenna Connections
There are a total of six antenna connections available of the RX INN and typically installed
with an N type female connector. This allows for external antennas as well a optional omni
directional antenna to be installed.
Four antenna connections are located at the bottom of the chassis and are classified as Ant
0, Ant 1, Ant 2 and Ant 3.
There are also two optionally installed antenna ports at the top of the chassis which are
classified as Ant 4 and Ant 5. The top connectors are typically used with omni directional
antenna’s.
Ethernet Connections
The RX INN has two Ethernet 10/100BaseT interfaces, implemented with Ethernet
coprocessors built into the NPEs. The RX INN uses the Broadcom BCM5241 Ethernet PHYs.
Both ports support Auto-MDIX, automatically sensing and adjusting to work with whatever
type of Ethernet device is at the other end of the Cat5 cable. The Ethernet interfaces
automatically adapts to match the polarity of Ethernet signals on the cable and swapping of
the recieve and transmit pairs when connecting to Ethernet devices other than switch/hub
ports – without the need for crossover cables.
They support both full-duplex and half-duplex mode of operation and also contain two 256-
byte FIFO: one for transmit data and the other for receive data.
Eth0 also supports Power over Ethernet (see Power Connection details below).
Console Connection
The RX INN provides two dedicated asynchronous, serial, I/O ports (UART0 and UART1),
however, only one of these are exposed through the bottom connectors. These UARTs are
16550-compliant with flow control and enhanced with larger 64-byte transmit and receive
buffers.
UART1 is provided through a male DB-9 connector and presented at the bottom of the unit
through the Console port as an RJ45 connector. The interface uses standard RS-232 levels.
The interface is DTE and supports handshaking via RTS and CTS. The pinout of the DB-9
appears in the table below:
Pin Number Signal Name Pin Number Signal Name
1 Not Connected 2 URT1_RXD
3 URT1_TXD 4 Not Connected
5 GND 6 Not Connected
7 URT1_RTS 8 URT1_CTS
9 Not Connected
UART0 is intended for use as a console port during development and debug of custom
software for Pronghorn Metro. UART0 is not intended for normal user access during system
operation – this serial port uses 3.3V logic level signals (not RS-232 level) brought to 6-pin