From software 2.23, it is possible to DE-REGISTER the SIP account if the DECT handset is: How long does it take before the system knows the handset is not available. N670/N870(E) - Switched off
- Out of range (Can take up to 3 hours for the system knows the handset is out of range)
- Remove battery (Can take up to 3 hours for the system knows the handset switched off)
N610 - 3 - 6 hours (DECT handset DETACH procedure is performed only for ARI-Class B systems (N670/N870(E) but not for ARI Class A systems (N610))
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