Lucent Technologies 555-670-111 Benutzerhandbuch

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MERLIN LEGEND Communications System Release 7.0
System Programming  
555-670-111  
Issue 1
April 1999
Glossary 
GL-29
 
V
Uninterruptible 
Power Supply
Se
.
Unit Load 
Measure of the power load drain of a module, telephone, or 
adjunct.
Unmonitored 
Extension
Extension for which no CTI application is receiving call 
information. See also 
.
Unrestricted Data 
Channels
Also called 
Clear Data Channels. Allow the transmission of 
occurrences of more than seven contiguous zero bits. If an 
unrestricted data channel is requested and only restricted 
channels are available, the call will be rejected. See also 
.
UPS 
Uninterruptible Power Supply. Device that connects to the 
system to provide 117 VAC to the equipment when the 
commercial power source fails.
VAC 
Alternating Current Voltage.
VDC 
Direct Current Voltage.
VMI 
Voice Messaging Interface. Enhanced tip/ring port.
Videoconferencing
System
System application that allows face-to-face meetings, with 
voice and video, between individuals or groups. This 
application requires high-speed data transmission facilities. 
See also 
.
Virtual Private 
Network
Se
.
VPN
Virtual Private Network. Type of private network that uses 
the switching capabilities of the 
PSTN, rather than tandem 
switching, to direct calls between connected 
communications systems. A VPN may constitute a part of a 
private network.
Voice Announce
System feature that allows users to receive voice 
announcements on their telephones. In Release 7.0 and 
later systems, the VA On Idle Only option (only for MLX 
telephones) allows voice announcement calls to go through 
only when the telephone is idle. 
Voice-Band 
Channel
Transmission channel, generally in the 300–3400-Hz 
frequency band.
Voice Mail
Application that allows users to send messages to other 
system extensions, to forward messages received with 
comments, and to reply to messages.
Voice Messaging 
Interface
Se
.