Honeywell International Inc. HD-128 Benutzerhandbuch

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CONFIDENTIALITY STATEMENT 
This document contains information that is private and Confidential, and is supplied on the express condition that it is not to be 
used for any purpose other than the purpose for which it was issued, nor is it to be copied or communicated in whole or in part, to 
any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd. 
Copyright © EMS Technologies Canada, Ltd.
 
HSD Aeronautical Transceivers 
74 
Troubleshooting calls 
The following section provides basic troubleshooting 
information that includes symptoms and suggested solutions.  
Troubleshooting voice calls 
Symptom 
 
Solution
The number you have dialed may be 
incomplete or incorrect.  
Check your number and try again. For the correct 
number format, refer to the calling instructions 
provided in this User’s Guide.  
 
A toll-free number was dialed. 
Most toll-free numbers do not work with the 
aeronautical Satcom Network. 
 
The pound key # was not pressed. 
When placing a call from air-to-ground, the 
pound key must be pressed to initiate the calling 
sequence.  
Try your call again, making sure that you end your 
dialing sequence by pressing #
Call does not 
ring through. 
No tone is 
audible even 
after 30 to 60 
seconds.  
Physical connection to the HSD Transceiver or 
attached user devices may be broken. 
Check all wiring connections and try your call again. 
System has not cleared previous calls. 
Dial tone must be audible; dial tone indicates that 
the system is ready. If dial tone is not audible, hang 
up and wait 30 seconds for the system to clear, and 
then try your call again. 
Call does not 
ring through. 
Fast busy 
signal is 
audible in 
handset. 
The System is busy or is in a transient state. 
(The system may be logging-on, changing 
beams, or acquiring a satellite or LES.)  
Listen for dial tone before placing your call.