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Get your SIP registration details for the device line; more information can be found here.
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Access the phone’s web UI through a web browser.
Go to ‘Account’ -> ‘Register’.
From the ‘Register’ section, select the desired ‘Account’ from the drop-down menu.

Enter the below information corresponding to the device line of the phone on Nebry UC.
Register Name = Account / Username

Username = Account / Username

Password = Password

SIP Server 1
Server Host = SIP Server / Proxy
Port = 5061
Transport = TLS
Server Expires = 3600

Leave everything else as it is.
Click ‘Confirm’ to save the changes.
From the ‘Codec’ section, enable only the below codecs in the correct order.
G722, PCMU, PCMA, Opus

Click ‘Confirm’ to save the changes.
From the ‘Advanced’ section, enable media encryption.
RTP Encryption (SRTP) = Compulsory

Click ‘Confirm’ to save the changes.
Go back to ‘Account’ -> ‘Register’, select the desired SIP account from the drop-down menu, and activate the line.
Line Active = ON

Click ‘Confirm’ to save the changes.