49
Glossary
Erlang
Unit which measures the traffic volume in a communications system. One erlang corre-
sponds to the continuous full capacity utilisation of one connection channel in a specific
period.
Frame
For radio transmission, DECT uses a time multiplex procedure with a frame structure for
separating the uplink and downlink for each radio channel (
). This time
frame is ten ms long and is subdivided into 24 time slots (slot 0 – 23). The first 12 time slots
are for the downlink and the second 12 time slots for the uplink. For one connection, the
base station and handset each occupy one
Frame quality
The radio quality in the DECT network is measured at defined time intervals. The frame
quality indicates the percentage rate of the packages received without errors in a meas-
urement interval.
Frequency
The frequency range 1880 –1900 MHz is assigned exclusively for DECT in Europe. This fre-
quency band is divided into ten carrier frequencies (channels) with a channel interval of
1728 kHz, where 0 represents the highest frequency and nine the lowest.
Handover
Possibility for a subscriber with a DECT handset to change from one cell to another during
a call or a data connection without interrupting this connection.
HDSP™
High Definition Sound Performance,
Gigaset technology for extraordinary sound quality in which the sound in calls is transmit-
ted via the Internet in double
(8 kHz).
Multi-cell system
DECT wireless network that consists of the cells of several base stations. A DECT multi-cell
system must have a
£
as the central station.
Narrowband mode
For VoIP (digital transmission medium), voice data is transmitted in narrowband mode or
£
. In narrowband mode, a transmission rate or
of up to
32 kbit/s is available.
The bandwidth used for the transmission is determined by the selection of a
.
RFP
Radio Fixed Part
Base stations in a multi-cell DECT network.
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