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Glossary
© Polycom, Inc. 219 ViewStation User Guide
Digital or Proprietary Device Telephone equipment designed specifically
for connection to a particular brand and
model of PBX.
DSL Digital Subscriber Line. Uses existing copper
telephone lines and connects to the phone
company’s Central Office (CO). DSL
transforms these phone lines into
multi-megabit data pipes for digital video and
data.
DB-25 The standard 25-pin connector used for
RS-232 serial data communications. In a
DB-25 there are 25 pins, with 13 on the top
row and 12 on the bottom. DB-25 connectors
are available in male and female.
DVD Digital Video Disc.
End point A terminal, site, gateway, conferencing
system, or MCU.
Ethernet 10 Mbps or 100 Mbps LAN technology based
on CSMA/CD. The Ethernet standard is
called 802.3 and was ratified by the IEE.
Ethernet was one of the first LAN
technologies and has been very popular for
workgroups.
Far End The party or parties connected to a call.
Fast Ethernet 100 Mbps LAN technology based on
CSMA/CD used for both high bandwidth
users in workgroups and for backbones.