Business telecommunications and IT systems

see Telephone Numbers.

see Telephone Numbers.

see Telephone Numbers.

see Telephone Numbers.

see Telephone Numbers.

see Telephone Numbers.

see Telephone Numbers.

see Telephone Numbers.

IEEE (802.3) standard of running Ethernet over 4 pairs of shielded twisted pair (STP) or unshielded twisted pair (UTP) cable at 100Mbit/s.

Specifically designed for voice grade quality, hence the letters VG.

A 3Com proposal that provides 100Mbit/s Ethernet which preserves the CSMA/CD protocol.

IEEE (802.3) standard for running Ethernet over shielded twisted pair (STP) or unshielded twisted pair (UTP) cable.

Supports Ethernet at 10Mbit/s.

see Emergency Calls.

An IT term.

In computer architecture, 16 bit is at most 16 bits wide.

21st Century Network.

21CN is the combination of 16 separate networks, such as PSTN, ISDN, Frame Relay, X.25, etc, into one new Next Generation Network (NGN).

21CN replaces the 16 technologies involved with the 16 networks, and uses IP only.

Refers to BRA with its two 64kbit/s user channels and one 16kbit/s signalling channel.

Refers to PRA with its thirty 64kbit/s user channels (1-15 & 17-31) and two 64kbit/s channels, channel 0 for synchronisation and error checking & channel 16 for signalling.

An IT term.

In computer architecture, 32 bit is at most 32 bits wide.

3Com is a digital electronics manufacturer best known for its computer network infrastructure products.

The name 3Com came from the company's focus on "Computers, Communication and Compatibility".

In April 2010, Hewlett-Packard acquired 3Com.

A cellular radio term.

The generic term for third generation mobile phone technologies.

3G will bring very high speed connections to cellular phones, thus enabling video conference and other applications requiring broadband connectivity to the Internet.

An IT term.

In computer architecture, 64 bit is at most 64 bits wide.