VoiBridge
www.topex.ro
installation manual
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34
9 GLOSSARY
Ethernet
- Standard for wired computer networks. Ethernet networks are connected by cables,
switches and hubs, and move data around. For wired connections, TOPEX VoiBridge provides one
Ethernet port for the local network (LAN) and one port for the WAN network.
IP
– Acronym for
Internet Protocol
. It is the protocol from TCP/IP that directs the way data is sent
from one computer to another on the Internet. The messages are divided into data packets, routed
from the sender network to the receiver network and there re-assembled in the right order to re-
create the original message. Because a message is divided into a number of packets, each packet
can, if necessary, be sent by a different route across the Internet. These data packets can arrive in a
different order than the order they were sent in. The Internet Protocol just delivers them. It's up to
TCP protocol (Transmission Control Protocol) to put the packets back in the right order.
GSM
– Acronym for
Global System for Mobile Communications
- The dominant digital cellular
technology for mobile telephone networks in Europe. GSM (formerly called "Groupe Speciale Mobile")
utilizes the 905-915 MHz and 950- 960 MHz reserved spectrum to provide roaming capability across
18 countries in Europe. GSM 1900, the North American version of GSM, allows the standard to be
used in the 1,900 MHz frequency band, which the U.S. Federal Communications Commission and
Industry Canada have allocated for personal communication services (PCS).
LAN
- Acronym for
Local Area Network
(computer network that spans a relatively small area). A
group of computers, workstations and associated devices that share a common communications line
or wireless link and are located in a relatively limited area, typically inside the same office building.
The communications link that interconnects these computers allows any device of the network to
interact with any other from the same network.
PBX
- Acronym for
Private Branch eXchange
. The PBX is a small, enterprise version of the larger
central switching office of the phone company. A PBX is a private telephone switch. It is connected to
groups of trunks (junctions) from one or more central offices and to all of the telephones at the
location (subscribers, local extensions) served by the PBX. Current exchanges are in fact PABX,
automated PBX, which don’t require a human operator to route the calls.
PSTN
- Acronym for Public Switched Telephone Network(s).
SIP
– Acronym for
Session Initiation Protocol
. A protocol proposed standard for initiating,
modifying, and terminating an interactive user session that involves multimedia elements such as
video, voice, instant messaging, online games, and virtual reality. It is one of the leading signaling
protocols for Voice over IP, along with H.323. SIP clients traditionally use TCP and UDP port 5060 to
connect to SIP servers and other SIP endpoints. SIP is primarily used in setting up and tearing down
voice or video calls.
UMTS
– Acronym for
Universal Mobile Telecommunications System.
The first of the third-
generation (3G) cellular networks, UMTS is being designed to offer speeds of at least 144 Kbps to
fast-moving (e.g., vehicle-based) mobile devices, and offer an initial 2 Mbps to campus sites —
designers expect to increase this to 10 Mbps.
VoIP
– Acronym for
Voice over Internet Protocol
. It achieves the voice calls routing over the
Internet or over any network based on the IP protocol, even in the local networks. Two principal
standards are available for the VoIP
WAN
- Acronym for
Wide Area Network
. A system of LANs, connected together. A WAN is a
network that connects computers located in separate areas, (i.e., different buildings, cities, countries).
The Internet is a wide area network.
