CB-OWSPA311GI-01【PDF 23/60 页】KIT START OEM WIRELESS LAN RS232

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A remote peer is addressed using a Uniform Resource Locator, URL. These locators are strings

representing nodes on internet or on a local net. This is the same addressing technology used in

for example a web browser. For more information about URLs, read RFC 1738.

In general, URLs are written as follows:

<scheme>:<scheme-specific-part>

Where <scheme> is the scheme or protocol used when communicating and <scheme-specific-

part> is normally the address and port number of the remote node.

For example, a web server on the internet can have the following address:

http://www.connectblue.se

This tells the browser to use the HTTP protocol and connect to the node at address

“www.connectblue.se”

Similar addressing scheme is used by the OWSPA311g to pinpoint the remote peer. The scheme

is not “http”, but the node addressing is identical.

Available schemes:

?

?

tcp: TCP connection

udp: UDP connection, broadcast capabilities

Syntax:

<scheme>://ipaddress<:portnumber>

Remarks:

1. IP address can be either a numeric IP address or a host and domain name that can be

resolved using the configured DNS servers.

2. If scheme is not given it defaults to “tcp”

3. If the port is not given it defaults to 0 (zero).

Examples:

tcp://10.0.0.9:5003

tcp://www.connectblue.se:80

udp://192.168.0.42:6809

Once a remote TCP peer is connected, it can not be disconnected via any commands. The peer

will have to be removed from the settings and the module rebooted. If the other end of the

connection decides to close the connection the OWSPA311g will close the connections grace-

fully. The connection will also be removed it the OWSPA311g detects that the remote host no

longer acknowledge the sent packets.

UDP is a connection-less protocol and the peer will therefore, once activated, always remain ac-

tive until a reboot of the OWSPA311g is performed.

Listeners

The OWSPA311g can also be set to listen for traffic and incoming connections on specific ports.

As with the remote peers it uses TCP and UDP.

If the TCP listener is active and an incoming connection is detected on the specified port the

OWSPA311g will negotiate a TCP handshake and establish a TCP connection. It will also create

a peer which works in the same way as a remote peer once it is connected. You can not tell the

OWSPA311g to disconnect peers that has been spawned in this manner.

Transferring Data

Version 1.6.6 - 2009-11

23

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