getRegistrationStatus tells you whether a SIP device is registered for an account and returns the details of the registration. Use it to check that a customer’s phone or PBX is online before you troubleshoot calls.
The method supports trusted mode with i_customer, the customer that owns the account.
Contact header of the registration: where calls to the account are sent
expires
string
When the registration expires, in UTC, in the format %H:%M:%S.000 GMT %a %b %d %Y, for example 09:57:29.000 GMT Wed Nov 18 2026. This is a string, not a dateTime