All handsets on the same W60B loose registration after many attempts to register

[Alvaro Gutierrez]

Hi all,

We have 6 W60B bases (firmware 77.83.0.65) with 19 W56H handsets (firmware 61.83.0.50) some of them configured in several bases. The bases are registered in an ISSABEL ENTRY.
When many attempts are made to register with a W56H handset in the DECT W60B base, all the handsets that are configured and functioning there lose registration and it is not possible to recover their operation.
The DECT W60B is unusable.

Apparently the handset is registered, but when calling indicates that it is out of service and when trying to dial indicates "Via: IPCall" (not the number of the extension of the handset).

The following activities were carried out without obtaining positive results:
Firmware update of the DECT W60B base
Factory reset of the DECT W60B base
Deletion and creation of accounts in the DECT W60B database
Deletion and extension cration in ISSABEL ENTRY
IP address change in the DECT W60B base

To verify the ISSABEL, Yealink T19 telephones were programmed with the numbering that the handsets have and they worked correctly.
Handsets that stopped working on the base are registered on operational bases and work correctly.

Attached logs and image of the configuration that has the base.

In advance we increase the help they can give us.