Section 9 REMOTE CONTROL
172
data information from the coded audio signal and output it on it's own serial interface if
it is in transparent mode.
•
The ancillary data transmission is fully bi- directional and does not affect any
ongoing audio transmission. The necessary bitrate to transmit ancillary data,
however, is taken from the overall available line bitrate.
•
Ancillary data that is fed into the Zephyr without having a connection will be lost.
•
The ancillary data channel is an on- demand service, which means that the audio
bitrate is only reduced if necessary. However, data can be transmitted continuously
at the currently selected serial baud rate.
•
Ancillary data is only available in Layer 3 mode.
•
In Dual/Mono mode ancillary data will be transmitted in the left channel only
unless commanded otherwise.
How to Control Ancillary Data Transmission
By default, a receiver will automatically switch to transparent mode if it receives
ancillary data from the other end. It will print CONNECT to the serial port and then start
outputting received ancillary data.
•
To switch off transparent mode and to gain access to Zephyr control commands
again, enter
+++
or
###
. (Do not transmit any data within a guard time of 1 second
before giving this command.)
•
After switching off the transparent mode, the Zephyr will NOT switch back to
transparent mode even if it encounters incoming ancillary data ("automatic
transparent mode activation" is deactivated). This prevents a local unit from going
immediately back to transparent mode when the other end is still trying to send
ancillary data.
Ancillary Data Commands
atdt
Immediately switches to transparent mode.
atdt w
Enables automatic transparent mode activation on incoming ancillary
data.
+++
or
###
Switch off transparent mode and automatic transparent mode
activation and return to Zephyr command interpreter.
Note that you will have to use the
###
command if you have a modem connection to a
remote Zephyr. This is because the
+++
command would activate the modem's
command interpreter rather than the remote Zephyr's.
Startup Commands
Startup commands are a simple way to perform basic RS232 configuration during the
Zephyr boot sequence. This may be necessary when no PC is available, as when a radio
transmitter remote control is to be connected directly to the serial port.
Summary of Contents for Zephyr
Page 13: ...Table of Contents 13 SECTION 1 QUICK RESULTS ...
Page 26: ...Section 2 INTRODUCTION 26 This page intentially left blank ...
Page 27: ...Section 2 INTRODUCTION 27 SECTION 2 INTRODUCTION ...
Page 38: ...Section 2 INTRODUCTION 38 This page intentionally left blank ...
Page 39: ...39 SECTION 3 ZEPHYR AT A GLANCE ...
Page 52: ...Section 4 INSTALLATION BASIC OPERATION 52 This page intentionally left blank ...
Page 53: ...Section 4 INSTALLATION BASIC OP 53 SECTION 4 INSTALLATION BASIC OPERATION ...
Page 84: ...Section 4 INSTALLATION BASIC OPERATION 84 ...
Page 85: ...Section 5 ISDN 85 SECTION 5 ISDN ...
Page 105: ...Section 6 NON ISDN NETWORKS 105 SECTION 7 AUDIO CODING ...
Page 118: ...Section 7 AUDIO CODING PRINCIPLES 118 This page intentionally left blank ...
Page 119: ...Section 8 DETAILED MENU REFERENCE 119 SECTION 8 DETAILED MENU REFERENCE ...
Page 157: ...Section 9 REMOTE CONTROL 157 SECTION 9 REMOTE CONTROL ...
Page 176: ...Section 9 REMOTE CONTROL 176 This page intentionally left blank ...
Page 177: ...Section 10 ADVANCED PROBLEM SOLVING 177 SECTION 10 ADVANCED PROBLEM SOLVING ...
Page 196: ...Section 10 ADVANCED PROBLEM SOLVING 196 This page intentionally left blank ...
Page 197: ...Section 11 TECHNICAL INFORMATION 197 SECTION 11 DETAILED TECHNICAL INFORMATION ...
Page 219: ...Section 12 SCHEMATICS 219 SECTION 12 SCHEMATICS ...
Page 221: ...Section 13 MANUFACTURER S DATA SHEETS 221 SECTION 13 MANUFACTURER S DATA SHEETS ...
Page 223: ...Section 14 SPECIFICATIONS WARRANTY 223 SECTION 14 SPECIFICATIONS AND WARRANTY ...
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Page 229: ...Section 15 APPENDICES 229 SECTION 15 APPENDICES ...