[PROVIDER]
type = registration
server_uri = sip:1.1.1.1:5060
client_uri = sip:1.1.1.1:5060
contact_user = 123456
outbound_auth = PROVIDER_auth
[PROVIDER_auth]
type = auth
username = user
password = pass123
[PROVIDER2]
type = registration
server_uri = sip:1.1.1.1:5060
client_uri = sip:1.1.1.1:5060
contact_user = 98765
outbound_auth = PROVIDER2_auth
[PROVIDER2_auth]
type = auth
username = user2
password = pass123
to verify use the below clo command
CLI>pjsip show regsitrations
OUTPUT:
PROVIDER/sip:1.1.1.1:5060 PROVIDER_auth Registered
PROVIDER2/sip:1.1.1.1:5060 PROVIDER2_auth Registered