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Page 25
A RJ45 connector at the rear panel provides a serial port (RS232 port) for
sending/receiving auxiliary data along with the encoded audio for IP
communications.
II.6.3.1.
RS232 port
The RS232 port is for use as auxiliary data port. This port allows the transmission
and reception of data along with encoded audio. Note that this socket is RJ45
connector, as opposed to the typical Sub-D 9 ways connector. To make the
conversion between RJ45 and RS232 Sub-D connector there are modular
connectors available that should be wired as follows:
Nereus
RJ45
Connector
9-pin female
D-sub
Connector
1 (NC)
1
2 (Rx)
3
3 (GND)
5
4 (NC)
4
5 (NC)
6
6 (GND)
7
7 (Tx)
2
8 (NC)
8
1,4,5,8 must be unconnected
The port is always set to 8 DATA bits, NO parity, 1 START bit and 1 STOP bit.
The bit rate can be adjusted to between 300 and 9600 bps via software.
Each Quantum Portable acts as a DCE device, therefore the connection to
each of the RS232 ports is wired in the following way:
Quantum Portable
–
Pin 7 connector RJ45.........................Pin 2 PC
Quantum Portable
–
Pin 2 connector RJ45.........................Pin 3 PC
Quantum Portable
–
Pin 3,6 connector RJ45......................Pin 5 PC
Hardware handshaking signals are ignored.
