BendixKing KHF 990 - Manual (Page 119)

or the ground operator may relay the message for the crew, if
desired.
If the signal quality is adequate, the operator will advise the aircraft to
stand by for the patch. The ARINC operator will then place a call
using direct distance “station-to-station” dialing wherever possible.
When the office is reached, the operator will connect his radio equip-
ment to the telephone line and advise the crew to “Go Ahead.”
When the conversation is completed, the crew should advise the
ARINC operator, who will then disconnect the phone patch.
GROUND-TO-AIRCRAFT CALLS
Authorized company personnel may call the aircraft by placing a call
to the appropriate ARINC facility (using the numbers provided to
authorized ARINC users). Long distance calls to the ARINC facilities
should be placed on a “station-to-station” basis and must be prepaid.
ARINC operators will not accept collect calls.
The company personnel initiating the call must give the following
information to the ARINC operator.
A. Company identification/job title/location.
B. Authorized telephone number.
C. Aircraft identification and SELCAL code (if applicable).
D. Approximate location of the aircraft.
The ARINC operator will request the caller to stand by and will
authenticate the call. When the operator is satisfied the call is autho-
rized, he will establish communications with the aircraft and inform
the caller the aircraft is standing by.
At the conclusion of the conversation, the company personnel placing
the call should advise the ARINC operator who will terminate the tele-
phone/radio connection.
NOTE: This type of telephone/radio connection is “one way” (send or
receive) only. Break-ins and interruptions are not possible. In the nor-
mal “at rest” condition, the ground caller receives the aircraft trans-
mission. When the ground caller speaks, a voice-operated relay
switches the radio channel from receive to send and the aircraft
receives the transmission. If the ground caller and aircraft transmit
simultaneously, neither will receive the other. Thus, each should indi-
cate the end of a transmission with the words “over” or “go ahead”.
Services
6-3 KHF 950/990 Pilots Guide
Rev. 0
Dec/96