Mitel SIP-DECT Multi-Cell for MiVoice Connect Planning and Installation Guide
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The DECT base stations are synchronized over the air interface. The first DECT base
station to complete startup transmits a signal on the air for the other DECT base
stations to synchronize from. If a DECT base station gets in sync, it transmits a signal
on the air and becomes the sync source for the next DECT base station. Only DECT
base stations that can receive a synchronization signal become synchronized.
For the DECT base station to sync to another DECT base station, the signal strength
cannot drop below 70 dBm. You must consider this requirement during the site survey.
If a DECT base station is not in sync, no calls can be established using this DECT base
station.
If a DECT base station loses the synchronization, the DECT base station does not
accept new calls (“busy bit”). There is a delay of maximum 3 minutes until the active
calls on this DECT base station are finished. Then it tries to get synchronized again.
A SIP-DECT installation is more reliable if a DECT base station can receive the signal
from more than only one DECT base station because the other signals are also used
for synchronization.
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