Xblue Networks X-50 - Manual (Page 248)

Glossary of Terms
248 XBLUE Networks
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MSCHAPS – Microsoft Version Challenge Handshake Authentication Protocol – enables mutual authenti-
cation between peers by piggybacking a peer challenge and response packet for each successful packet.
Protocol – A clearly defined way of doing something.
PSTN – Public Service Telephone Network – Is the generic name given to the legacy telephone company
lines.
QOS – Quality of Service – Although QoS is synonymous with packet prioritization; it really is the measurement
of the voice or data transmission quality, from end to end. However, QoS can be improved by using packet priori-
tization, which allows voice to take precedents over data packets. This results in a better “connection” and commu-
nication between two end points.
Remote Worker – A remote worker is someone that will be using the telephone system’s resources but does not
reside in the same physical area.
RJ21X – An RJ21X is the location, usually on a “Punchdown Block”, where the Telephone Compnay’s Telephone
Lines enter into the building.
Router – A router is used to direct incoming and outgoing data packets. A router is often used to assign DHCP
Addresses, basic Internet security and Network Address Translation (NAT).
Security – (See Wireless Security)
SIP – Session Initiated Protocol – This protocol was specifically developed for transmitting voice over the
Internet, by communications professionals. SIP has very little “overhead” helping to eliminate jitter and latency.
Although not yet realized, SIP was developed as an “universal standard”, and the goal is to make SIP phones as
common as standard 2500 sets.
STUN – Session Traversal Utilities for NAT – STUN is a protocol that allows applications operating through a
Network Address Translation (NAT) to discover the presence of a network address translator and to obtain the
mapped IP address and port number that the NAT application (UDP) contains to remote hosts.
SMTP – Simple Mail Transport Protocol – is the standard used to transport outgoing electronic mail (E-mail)
across IP Networks. Generally, SMTP uses Port 25, but must sophisticated gateways will allow the administrator to
match the port with the provider.
Static IP Address – See IP address
SSID – Service Set Identifier – is the name that identifies a particular wireless LAN. This name is broadcast
and can easily be found by another wireless device.
SSL – Secure Sockets Layer – is one of the cryptographic protocols (type of encryption) used to provide security
over an IP network such as the Internet. Generally, SSL uses port 443.