2N OS version 2.48.1 for 2N Elevator Systems includes the following changes

Precautions to be taken during update to FW version 2.48.x

• All 2N OS devices (except those on the original platform: IP Vario, IP Force, IP Safety, IP Solo, IP/LTE Verso, IP Base, IP Uni, IP Audio Kit, IP Video Kit, Access Unit, SIP Speaker) can no longer be downgraded below version 2.47.0 after updating.
• Devices no longer accept certificates signed with 1024-bit RSA keys. These certificates are removed during the update and must be replaced with certificates using at least 2048-bit RSA or ECC keys. Services relying on weaker certificates will stop functioning, and a warning will appear next to the certificate selection parameter in the web interface.

New Functions and Improvements

• Devices can now generate Certificate Signing Requests (CSR) directly from the web interface under System > Certificates > CSR.
• All SIP accounts now support additional backup proxy and registrar servers.
• Changing the web interface password now requires entering the current password. As a result, restoring a configuration will no longer change the password. Auto Provisioning can change the password only if the current one is still set to default.

Essential Corrections

• Improved certificate handling.
•  The `OutputChanged` Automation block in Sentrio Cabin now displays the correct outputs.
• The `CallSessionStateChanged` event now triggers correctly for both Checking and Operational Calls.
• Prevented some certificates from reverting to factory defaults after a software factory reset (without selecting Network Settings), avoiding potential network disconnection.
• SIP unregistration now works correctly with non-RFC-compliant User Agent Servers.
• Removed certain unnecessary syslog messages.
• Improved formatting of exported Directory CSV files.
• SIP authentication passwords can now be up to 255 characters in length.
• DNS request lengths can now be up to 255 characters.
• Commas in the Subject field of the `SendEmail` Automation block no longer cause the subject line to be truncated.
• Fixed device crashes caused by missing Origin fields in SDP offers.
• SRTP media is now correctly offered in the ACK response when using delayed SDP negotiation enforced via options.
• When SRTP is re-negotiated during a RE-INVITE, the newly established encryption key is now properly applied to outgoing media streams.
• Improved stability of the G.729 codec.
• Improved SMTP reliability.
• Enhanced handling of large-scale user directory operations.
• Important bug fixes.