SS-16 VoIP-2-GSM USER MANUAL
DOC. NO: SS-16-14 (REV. 02)
Page 79 of 84
Dynamic DNS
- service that allows clients connecting to the Internet with a dynamic
IP address to be able to use applications that require a static IP address. The Internet
Service Provider changes the IP address of the users, but there are applications that
work only with static (fixed) IP addresses. Dynamic DNS makes it possible for sites on
the Internet to establish connections to you computer without need for tracking the IP
address themselves. DDNS is useful both for wired or wireless (such as 3G) dialup
connection where at each connection a new address is assigned, and for DSL
services where the address is changed occasionally by the ISP.
Domain Name Resolution -
The resolving of a domain name. Internet applications
don’t communicate with domain names such as google.com or SS Telecoms.ro,
instead they use IP addresses (for example 193.226.61.95 or 216.239.39.99).
Domain Name Resolution is the process (transparent for the user) of converting
domain names into corresponding IP addresses. Every operating system has routines
that deal with resolution of domain names.
Encryption
- This provides wireless data transmissions with a level of security.
Ethernet
- Standard for wired computer networks. Ethernet networks are connected
by cables and hubs, and move data around. For wired connections, SS-16 VOIP-2-
GSM provides one Ethernet 10/100 port, for connection to the local LAN.
Firewall
- System designed to prevent unauthorized access to or from a private
network. The firewall determines which information passes in and out of and prevents
anyone outside of your network from accessing your computer without authorization
and possibly damaging or viewing your files. Any company with an intranet that allows
its workers access to the wider Internet must use a software or hardware firewall to
prevent outsiders from accessing its own private data resources and for controlling
what outside resources its own users have access to. Here the firewall is software a
set of related programs (residing on the gateway server) that protect the resources of
the local (internal) network.
Gateway
- A network point that manages all the data traffic of your network, as well
as to the Internet and connects one network to another. SS-16 VOIP-2-GSM is also
gateway, since it interfaces between VoIP calls form the local network and the voice
mobile networks.
IP Address
– Short from Internet Protocol address. The numerical address of a
network device or resource as expressed in the format specified in the Internet
Protocol (IP). In the current addressing format, IP version 4, the IP address is a 32-bit
(4 bytes) sequence divided into four groups of decimal numbers separated by periods
("dots"). Each number can be zero to 255. These four groups of numbers look like
“127.0.0.1” or „213.154.120.170”. The four numbers in an IP address are used in
different ways to identify a particular network and a host on that 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.
Note that IP is a connectionless protocol, which means that there is no continuing
connection between the end points that are communicating. IP corresponds to the
layer 3, the Networking Layer from the Open Systems Interconnection (OSI)
communication model.
IP Tunneling -
a tunnelling protocol encapsulates a packet of the same or lower
protocol, while in a regular protocol, the lower layer protocol encapsulates the higher
level protocol. In order to achieve a Virtual Private Network (corporate network) you
must ensure the port forwarding (tunnelling), that is the transmission of private data
through a public network such as 3G. The routing nodes in the respective public
network must not be aware that the transmission is part of a private network.
Tunneling means the encapsulation of the data and protocol information of the private
network within the transmission units of the public network. Widely used tunnelling
