Restrict pjsip user registrations to only one account (ip phone)

Asterisk Asterisk SIP
1

how to limit accounts to register on the same pjsip user to only one account?
so if an account is already registered no other account can.

2

You set “remove_existing” to “no”. However, if the already registered device changes IP address or port and the registration is not expired, then they won’t be able to register either.

3

thanks. it worked.
is there a way to force this pjsip user to bind to an ip phone of a specific ip address !?

4

Uh, you could restrict the endpoint using ACLs. Or not even allow registrations and just configure an explicit contact on the AOR.

5

i dont get what is ACLs but i dont think i want to stop allowing registration you know.

6

ACLs restrict what IP addresses (or a single IP address) can use an endpoint. It is the permit and deny options.

7

ACL = access control list

The purpose of registrations in SIP is to provide details of an unknown address. Registration is not necessary for authentication.