User guide

TD 92422GB
18 February 2010 / Ver. E
System Planning
Ascom IP-DECT System
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8 Site Survey with IPBS Base Station
If the planned system shall have an IPBS, both speech coverage and sync coverage have to
be considered. If the system only consists of IPBL, only speech coverage has to be
considered.
Speech coverage: the radius of the circle (circular radiation patterns of the IPBS antennas
are assumed for reasons of simplicity), around a particular IPBS, in which portable parts
can communicate with that IPBS, see
figure 9.
Sync coverage: the radius of the circle, around a particular IPBS, in which other IPBSs lose
synchronization with that IPBS with a given synchronization loss probability. This means
that the size of the sync radius depends on requested probability of losing
synchronization, see
figure 9.
Figure 9. Air- and speech sync radius.
8.1 Start by placing two base stations in the site
Use the GUI web interface to configure IPBSs. For more information about the GUI web
interface, see the document Installation and Operation Manual for IP-DECT Base Station.
1 Set base station A in deployment mode.
2 Set base station A as Sync Master.
3 Register one portable device in base station A.
4 Set base station B in deployment mode. Use the same system ID as for base station
A.
5 Set base station B as Sync Slave.
6 Base station A shall be placed the first time on the planned location for the Sync
Master (should be in the middle of the site).
005
Air Sync Coverage
Speech Coverage