Signalling
222
DECT Networks
When gateways are connected, the synchronisation signal is transmitted via
the PCM-V line.
If you wish to additionally use DECT-over-IP base stations on the
Forum 5004/5008/5012 communications system, all DECT-over-IP base
stations must be operated in
one
separate DECT area (in the example:
“DECT Area 3”).
Please note that DECT-over-IP base stations synchronise via radio
connection. This means that also on a DECT-over-IP network with multiple
radio areas, you have to additionally assign 2 or multiple groups of DECT-
over-IP base stations to separate clusters respectively (see
under
starting on page 211). Synchronisation
via radio connection must be possible within a cluster.
Please note:
The reception or transmission area of DECT-over-IP base
stations of one DECT area must not overlap with the reception
or transmission area of DECT base stations of another DECT
area. This prevents in reliable fashion any spontaneous roaming
of DECT terminals into another DECT area and thus undesired
interruptions of ongoing calls.
Signalling
The DECT base stations in a DECT network transmit a network code at regular
intervals. This network code (PARK, Portable Access Rights Keys) is displayed
in the
Configurator
of the Forum 5004/5008/5012 communications
system on the
System Info
:
Versions
status page. The PARK designates the
DECT network and can, e.g. be entered at the terminal when checking in a
DECT terminal.
A separate PARK code is used for each DECT area in a DECT network with
multiple DECT areas. The respective PARK to be used is randomly selected
from a pool upon configuration of a new DECT area. When different PARK
codes are used, each DECT terminal would have to be checked in once again
for each DECT area. For this situation, the DECT-GAP standard defines a
protocol for DECT networks with multiple DECT areas. This protocol makes it
possible for DECT terminals checked in one DECT area to connect to a DECT
base station from another DECT area without any additional checking-in.
