TD 92372GB
2007-06-18/ Ver. E
Installation and Operation Manual
IP-DECT Base Station & IP-DECT Gateway
47
Enable LED Indication of Air Sync
LED indication of air sync quality is enabled by marking the LED Indication check box. This
indication is used to indicate the air sync quality when planning or troubleshooting the
system, see
Verify the Air Sync Coverage
1
Configure an IPBS to be air sync slave, to synchronize to the base station in the site
survey tool (SST). Different B-ARIs can be assigned to the SST. Depending on the B-
ARI different sync RFPIs has the be used in the IPBS.
Figure 46.
B-ARI
Sync RFPI
10007504701
1004B2F120
10007504614
1004B2EE20
10007504613
1004B2ED20
10007504612
1004B2EC20
10007504310
1004B2BA20
Figure 47.
2
Install a license file, see
3
Assign a static IP address, see
4
Enable DECT master. The DECT radio is using local DECT master.
5
Enable LED indication of the air sync, see
Enable LED Indication of Air Sync
6
Power the IPBS using a battery pack.
7
Move the SST to the planed location of the sync master. Move the IPBS to the
planned base station locations with air sync hop 1 and check the upper LED. The
LED should be off or green, if it is fixed amber or flashing amber, the air
synchronization is inadequate.
8
Move the SST to a location with air sync hop 1 and verify that the IPBS has good air
sync coverage at base station locations with air sync hop 2.
Repeat step 8 for all air sync hops needed.
Select Synchronization Source for IPBS in Slave Mode
An automatic selection mode is available allowing the IP-DECT base station to
automatically select another IP-DECT base station as a host base. The IPBS automatically
creates and updates a list of IPBSs, within the coverage area.
A general criterion in the automatic selection mode is that an evaluation must be done on
the bearer. The numbers of incorrect A-fields are accumulated during 100 frames. This
value is called the Frame Error Rate (FER). If the FER value is above 90 the bearer can not
be used to start retrieve sync information from. However due to the nature of radio
environment the FER value may later increase above 90.