NetMedia SitePlayer Telnet Series, User Manual, Page: 19 / 52

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SitePlayer Telnet User’s Manual
Remote IP is
This allows you to specify how the Remote IP address will be treated.
Fixed - The remote IP address will not change when a UDP packet is received. If the UDP Remote
IP address is 0.0.0.0, then it will change once to reflect the UDP IP address of the first UDP packet
received.
Changeable - The remote IP address will change to reflect the IP address of the recently received
packet. All future packets will be sent to this new address.
UDP Timeout
UDP Timeout is the period measured in ticks (1 tick is 10ms). This is the time, after the last character is re-
ceived, that SitePlayer waits before sending any data it has in its buffer to the remote node via UDP. The
internal buffer can store about 250 bytes, so UDP transmissions from SitePlayer should be kept smaller than
that (unless your device supports flow control.)
Press the “Set UDP Configuration” button to have the changes take effect and restart SitePlayer.
Buffer Management
Buffer Management, which operates in both in UDP and TCP/IP modes, allows you to select how SitePlayer’s
serial receive buffer is managed. You can specify at which point data in the serial buffer will be sent to the
remote end. The buffer management conditions are used to help SitePlayer determine when the end of a se-
rial reception has been reached. They are not buffer formatting or packetizing parameters. SitePlayer takes a
best effort approach in sending data when any of the below buffer management conditions are satisfied.
For example, at baud rates greater than about 2400 baud and in UDP mode, some extra characters may be
sent after an End of Buffer Byte or any other buffer management condition (in TCP/IP mode, the remote end
only gets the characters that it requested so no “extra” bytes are sent.)
A benefit of the buffer management parameters, especially the Bit Stall Delay, it that character latency is very
low. For example, in TCP/IP mode, placing a loopback serial connector on SitePlayer and sending a single
byte from a remote host will yield responses in the order of 8ms.
Buffer Threshold
When the number of bytes in the serial receive buffer reaches this value, SitePlayer sends the bytes in the
buffer to the remote IP Address. The default value of 125 is one-half the buffer size. The buffer threshold is
active when no flow control is selected.
End of Buffer Byte is
This allows you to enable or disable SitePlayer’s checking for an end of buffer byte. The default is that end of
buffer byte checking is disabled.
Enabled - Enables detection of the end of buffer byte.
Disabled
- Disables detection of the end of buffer byte (default).
End of Buffer Byte
This specifies the byte value (in decimal) which will be used as a trigger to indicate to SitePlayer that the buf-
fer should be sent. The default value of 10 is the Line-Feed character which is useful in sending data that is
line oriented.
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