User's Manual

Part # 34357-MNL Rev.03 SPEEDLAN 9200 User Guide
Glossary-18
Subnet
This term allows you to create multiple networks within one Class A, B, or C network. Each data link (octet)
contains its own unique identifier also known as the subnet. Also, each node on the same data link must
belong on the same subnet as well.
Symbol Threshold
After a signal has been acquired, the acquisition algorithm in the spread-spectrum chip continues to run a
cross-correlation between the expected PN sequence and the received signal, but now uses the Symbol
Threshold for comparison. If the result of the cross-correlation drops below the Symbol Threshold, the signal
is considered to have been lost, and the algorithm begins trying to acquire the signal again.
System Gain
The sum of the transmitter power output and the receiver sensitivity. System gain is an important measure of a
system’s ability to overcome attenuation and perform to a satisfactory level. These are measured in decibels
per meter (dBm).
TCP (Transmission Control Protocol)
TCP is a user datagram type of protocol that ensure that the message was sent accurately.
TCP/IP (Transmission Control Protocol/Internet Protocol)
This is an Internet protocol, and it ensure that the data was sent accurately from one host to another.
Tx (Transceiver)
This is where the packet is coming from.
UDP (User Datagram Protocol)
A protocol within the TCP/IP protocol suite that is used in place of TCP when a reliable delivery is not
required.
WAN
A wide-area metropolitan network is a connection between LANs, which may be privately owned or rented.
Wired
A network interface connected by wire to other nodes in the network.
Wireless
A network interface that uses radio to communicate to other nodes in the network.