Max Local SIP Port: To configure maximum local sip port for
designated SIP account.
Min Local SIP Port: To configure maximum local sip port for
designated SIP account.
Caller ID Header: To choose Caller ID Header format
Auto Answer: If enabled, incoming call will be answered
automatically.
Anonymous Call: If enabled, R20 series will block its
information when calling out.
Anonymous Call Rejection: If enabled, calls who block their
information will be screened out.
Missed Call Log: If enabled, any missed call will be recorded
into call log.