HW831 User Guide Rev 1.0
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Glossary
3G: 3G is third-generation technology for mobile phone system which enables wide-area
wireless voice telephony and broadband wireless data.
APN: Access Point Name. An APN represents a point of connection of GPRS/3G network to
other external network, e.g. the Internet.
Class A Network: In a Class A network, the first 8 binary digits of the IP address indicate
the network address while the rest 24 binary digits indicate the host address. A Class A
network is able to support up to 16,777,214 (2
24
– 2) host IP addresses.
Class B Network: In a Class B network, the first 16 binary digits of the IP address indicate
the network address while the rest 16 binary digits indicate the host address. A Class B
network is able to support up to 65,534 (2
16
– 2) host IP addresses.
Class C Network: In a Class C network, the first 24 binary digits of the IP address indicate
the network address while the rest 8 binary digits indicate the host address. A Class C
network is able to support up to 254 (2
8
– 2) host IP addresses.
DHCP Server: Dynamic Host Configuration Protocol Server. A DHCP server assigns
unique IP addresses to clients (computers, routers or network adapters) attached to an IP
network.
DNS Server: Domain Name System Server. A DNS server translates human-language URLs
and email addresses into machine-language IP addresses. An IP address is made up of 32 bits
which is normally expressed in 8-bit decimal numbers of the format xxx.xxx.xxx.xxx.
Firewall: A firewall filters through all inbound data packets from the Internet to ensure that
they are safe before forwarding the data packets through. Any data packets that do not fulfill
the security criteria will be blocked from entering the network.
GPRS: General Packet Radio Service. GPRS is a technology that uses the existing GSM
network to transmit and receive IP packets to and from GPRS mobile devices.
GSM: Global Systems for Mobile Communications. GSM is a 2G mobile phone system. It is
the most popular standard for mobile phones used world-wide.
HSDPA: High-Speed Downlink Packet Access. HSDPA is a 3.5G wireless technology which
provides download speeds on wireless devices equivalent to wired ADSL connections.
HSDPA improves on WCDMA by using different techniques for modulation and coding.
.
IEEE 802.11b: A set of standards developed for wireless LAN which allows wireless
devices from different manufacturers to communicate with each other. The IEEE 802.11b
standard operates at a maximum data transfer rate of 11 Mbps at frequency 2.4GHz.