When creating a sip device, an exception occurs if the default line is not a sip line.
Need to check if have a sip line and fail gracefully if no sip line assigned - the exception is with SEP creation, and so can complete save, but warn that SEP file not created
Issue raised by @nortien
When creating a sip device, an exception occurs if the default line is not a sip line.
Need to check if have a sip line and fail gracefully if no sip line assigned - the exception is with SEP creation, and so can complete save, but warn that SEP file not created