==== telephone_descriptor

Defined by DVB in <<ETSI-300-468>>.

[source,xml]
----
<telephone_descriptor
    foreign_availability="bool, required"
    connection_type="uint5, required"
    country_prefix="string, 3 chars max, optional"
    international_area_code="string, 7 chars max, optional"
    operator_code="string, 3 chars max, optional"
    national_area_code="string, 7 chars max, optional"
    core_number="string, 15 chars max, optional"/>
----
