Traffic - Avaya DECT R4 Installation And Administration Manual

Installing and operating the IPBS and IPBL
When an IPBS increaments 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 goes 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 which increment of the sync lost counter happens:
The IPBS has not been able to find a synchronization source within 9 minutes.
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The PSCN value is changed.
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The value for frame number is changed.
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The value for multi frame number is changed.
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The number of enabled carriers is changed.
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If the PSCN, frame number, multi frame number, and/or the number of enabled carriers are
changed, then the radio stops to handle traffic immediately.
Impact for the users during speech
If the radio stops handling traffic as described, it does not necessarily mean a disconnected call.
In a system with good overlapping coverage it might be possible to make a handover to another
IPBS without disconnecting the call. If the portable device doesn't quickly find any other IPBS
the call will be disconnected and the portable device will indicate No System. As soon as the
IPBS is synchronized it is available again for portable device communication. The portable
device will then connect to the system in the same way as for a normal power on.
Impact for users In idle mode
In idle mode, a user will most likely not discover any problem. Since the portable devices have a
short delay before showing No System, the portable device has time to roam to another IPBS.
A good overlap between radio cells is required to make it possible for the portable device to
roam to another IPBS. If no other IPBS is available, the portable device(s) will indicate No
System. As soon as the IPBS is synchronized, it is available again for portable device
communication. The portable device will then connect to the system in the same way as for a
normal power on.

Traffic

Traffic information is displayed in the Traffic sub menu. For the Master, traffic information for the
IP-DECT system is displayed as well as traffic information for the Radio itself (if this Radio is
enabled).
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Avaya DECT R4 - Installation and Maintenance Guide 02/2016