Sip Extension password is same as Pbxes login to register extension, which is allows anybody using extension to know about your main Pbxes account. Request you to to change existing logic so any other password can be used in extension to register.
That is not true as far as I know. The PBXes account password does not have to be and should not be the same as the Extension password.
You are right, I never try to change the password was using the same login password. But now I changed the extension password different then login and working fine. Thanks