User's Guide

DRAFT
Page 2-5
17 Mar 2016
23-15-87
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-500 SDU and SCM
© Honeywell International Inc. Do not copy without express permission of Honeywell.
B. Logging On and Off
Using the TCP, you can log on to the satellite network manually or automatically:
• Manual Logon—constrains the logon to use a satellite that you select
• Automatic Logon—logs on using the best available satellite as defined by the ORT.
If specified in the ORT, the initial system logon happens immediately after the
A781-500 system powers up, with no TCP input required. If the ORT is not configured as such, you
must initiate the logon from the TCP (MANUAL LOG-ON or AUTO LOG-ON command). For more
information, see "ORT Overview" on page 3-7.
You can watch the progress of the logon on the SATCOM LOG 1/2 menu, or simply wait until the
prompt on the SAT-PHONE 2/2 menu indicates the service is available for use.
(1) Logging On Automatically
When you initiate an automatic logon, the system selects a satellite and GES based on the
preferences specified in the ORT.
To log on automatically:
(a) On the SAT-PHONE 2/2 menu, press the button next to LOG.
The SATCOM LOG menu appears.
(b) On the SATCOM LOG menu, press the button next to AUTO LOG-ON.
If you return to the SAT-PHONE 1/2 menu, then the SAT-L and SAT-R channels are
updated with READY status after the logon completes.
NOTE: The TCP does not display the AUTO LOG-ON and MANUAL LOG-ON functions
when the A781-500 system is already logged on.
DRAFT as of
4 Mar 2016