Operation
Avaya 374x DECT Telephones - User Guide 02/2016
127
Air Sync
This section only applies to the IPBS.
Air Sync status is displayed in the Device Overview > Air Sync menu. For explanation on the
information shown for the active and the alternative sync bearers, see the table below.
Figure 19.
Sync Lost Counter in IPBS
This section will describe briefly the different situations when the “sync lost counter” is
incremented and what impact it has for the users.
Sync Lost Counter
When an IPBS increments the sync lost counter it means that the IPBS stops to handle all radio
traffic for a while and after that restarts the synchronization procedure. The radio part is not
really restarted but out of service for a short time period. The IP-part of the IPBS is not affected
by this but is in service all the time.
There are five reasons for when the sync lost counter is incremented:
l The IPBS has not been able to find a synchronization source within 9 minutes.
l The PSCN value is changed.
l The value for frame number is changed.
l The value for multi frame number is changed.
l The number of enabled carriers is changed.
If the PSCN, frame number, multi frame number and/or the number of enabled carriers is
changed, then the radio stops to handle traffic immediately.
RFPI Radio Fixed Part Identity is the Id number of the sync bearer.
Carrier The carrier used for air synchronization
Slot The slot used for air synchronization
Hop The number of hops from the Sync Master to the sync bearer
RSSI Received Signal Strength Indication
FER Frame Error Rate, a value between 0 and 100%. Should be below
80% to be able to keep the synchronization.
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