AirLive WN-151ARM - Manual (Page 115)

AirLive WN-151ARM User’s Manual 115
PPTP
Point-to-Point Tunneling Protocol: A VPN protocol developed by PPTP Forum. With PPTP, users can dial in
to their corporate network via the Internet. If users require data encryption when using the Windows PPTP
client, the remote VPN server must support MPPE (Microsoft Point-To-Point Encryption Protocol) encryption.
PPTP is also used by some ISP for user authentication, particularly when pairing with legacy Alcatel /
Thomson ADSL modem.
Preamble Type
Preamble are sent with each wireless packet transmit for transmission status. Use the long preamble type for
better compatibility. Use the short preamble type for better performance
Rate Control
Ethernet switches' function to control the upstream and downstream speed of an individual port. Rate Control
management uses "Flow Control" to limit the speed of a port. Therefore, the Ethernet adapter must also have
the flow control enabled. One way to force the adapter's flow control on is to set a port to half-duplex mode.
RADIUS (Remote Authentication Dial-In User Service)
An authentication and accounting system used by many Internet Service Providers (ISPs). When you dial in
to the ISP, you must enter your username and password. This information is passed to a RADIUS server,
which checks that the information is correct, and then authorizes access to the ISP system. Radius typically
uses port 1812 and port 1813 for authentication and accounting port. Though not an official standard, the
RADIUS specification is maintained by a working group of the IETF.
Receiver Sensitivity
Receiver sensitivity means how sensitive is the radio for receiving signal. In general; the slower the
transmission speed, the more sensitive the radio is. The unit for Receiver Sensitivity is in dB; the lower the
absolute value is, the higher the signal strength. For example, -50dB is higher than -80dB.
RJ-45
Standard connectors for Twisted Pair copper cable used in Ethernet networks. Although they look similar to
standard RJ-11 telephone connectors, RJ-45 connectors can have up to eight wires, whereas telephone
connectors have only four.
Router
An IP sharing router is a device that allows multiple PCs to share one single broadband connection using NAT
technology. A wireless router is a device that combines the functions of wireless Access Point and the IP
sharing router.