Multenet PocketPAD Power over Ethernet, Руководство пользователя

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8 I N T R O D U C T I O N 8
M U LT E N E T P O C K E T P A D
PocketPAD, which in turn sends data to the connected serial device.
In the example below the application software running on the networked PC is only capable
of connecting to serial Com ports (i.e from COM1 to COM6) and not to an IP address. As the
PC has only two physical com ports, COM1 and COM2, you would create a virtual port (i.e.
COM6), using the redirector software. The redirector is then configured to connect COM6 to
the IP address of the PocketPAD connected to the remote serial device. When the application
sends to or requests data from the serial device, it connects to the device via COM6.
This is very useful when upgrading hardware and/or software to incorporate Ethernet support
proves to be too expensive.
Serial to Host’s Virtual COM Port
The COM port redirector software tools have two modes of transporting packets over the
Ethernet link:
The first method, Raw , streams the data through seamlessly. Configure the PocketPAD to
use ‘ Raw ’ as its network application protocol.
The second method, Redirector , involves the Telnet protocol (RFC-2217: Telnet Com Port
Control Option). If your software application changes the serial paramters used (i.e. varied
baud rates, data bits, stop bits, flow control, parity), you should use the Telnet Redirector
option. Remember to configure the PocketPAD’s network application to ‘ Redirector ’ as
well.
Different Ethernet Interfaces Available
Two Ethernet interfaces are available:
Copper: 10/100 Base-T with RJ-45 connector
10 Base-T: Supports a 10 Mbps data rate on UTP cable. The LAN segment length is only
100m.