I put Asterisk as a SIP-Based IVR server on LAN (10.1.80.0/24), softphone users (likes X-Lite) will make call into my IVR. This LAN is trusted, I wish all users on this LAN could use this IVR service, but these users SIP account name (Caller ID) are all dynamic. Is there anybody could tell me how to configure this in sip.conf ? this will be very helpful for me. Many thanks!
By the following sample, only “1234” user could register to Asterisk, and use my IVR service. Could  tag be dynamic ? for example [*] to accept all uses on LAN.