Mitel MiVOICE BUSINESS, Engineering Manualline

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Engineering Guidelines
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TDM – Time Division Multiplex. A means of combining a number of digitally encoded data or
voice channels onto a common digital stream, e.g. T1.
TFTP – Trivial File Transfer Protocol. A simplified version of FTP used to transfer data with
minimal overhead.
TOS – Type of Service. A field within the Layer 3 (IP) encapsulation layer to identify some
properties relating to service parameters; in this case, delay and priority of handling.
UCA – Unified Communicator Advanced. Fomer name for MiCollab Client, a PC-based
office management application, MiCollab Client Softphone is an enhanced version of MiCollab
Client that includes a PC-based phone.
UDP – User Datagram Protocol. A layer 4 protocol with minimal handshaking and overhead.
Used to stream voice. Considered connectionless.
Unicast – A process of transmitting messages from one source to one destination, as opposed
to a broadcast or multicast.
UPS – Uninterruptible Power Supply. A unit capable of providing output power for a period
of time when the local mains supply fails. Usually relies on storage devices such as batteries.
UTP – Unshielded Twisted Pair. Cable that reduces emissions and maintains an impedance
match through the twists per metre in the cable without resorting to shielding.
VLAN – Virtual LAN. A means of providing virtual LANs on a network using common physical
components. Such VLANs are logically unconnected except through some Layer 3 device.
VM – Voice Mail.
WAN – Wide Area Network. A network connection to a network that could be global, e.g. via
Frame Relay.
Wi-Fi – Wi-Fi Alliance technology for Wireless LAN based on IEEE 802.11.
WLAN – Wireless LAN.
WAV – WAVe file. Wav is an audio file format, created by Microsoft, that has become a standard
PC audio file format for everything from system and game sounds to CD-quality audio. A Wave
file is identified by a file name extension of .wav.