AVT MAGIC AC1, Руководство по аппаратному и программному обеспечению

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PAGE 126
O p t i o n : S e c u r i t y
– Telephone : Each telephone can be used as decoder
– 7 kHz : The Audio signal is coded with G.722 - 7 kHz
– MPEG 1B : The Audio signal is coded with the ISO/MPEG Algorithm
and J.52 signalling according to the settings in the dialogue Transmis-
sion Modes Æ MPEG Mode Æ 1B Mode .
– MPEG 2B : The Audio signal is coded with the ISO/MPEG Algorithm
and J.52 signalling according to the settings in the dialogue Transmis-
sion Modes Æ MPEG Mode Æ 2B Mode .
– MPEG 1B unframed : The Audio signal is coded with the ISO/MPEG
Algorithm without any further signalling according to the settings in
the dialogue
Transmission Modes Æ MPEG Mode Æ 1B Mode .
• Under
Delay Time
you select the desired size of the Audio ring buffer (in
seconds). The signal is output with the delay you set here. Depending on
the fact if you selected a 1 B or 2 B connection, you can set a maximum de-
lay time of 12 seconds or 6 seconds, respectively.
DTMF
• Under
Enable DTMF pad
you can select your system for
DTMF
control
(see special manual for MAGIC AC1 Security). The control window can be
reached
during a connection by pressing the
Connect
button.
• The configuration
Preselected Addresses
allows you to preselect up to
4 different addresses (
Address 1...4
), for which you can assign addition-
ally alias names (
Name 1...4
).
In the main window, you recognise an activated Security Mode by a button
displayed in red with which you can usually select the transmission mode. In
the case of an activated Security Mode, the transmission mode cannot be
changed anymore via this button.
FIG. 87 SECURITY MODE ACTIVATED
NOTE
If a 1B connection (all modes except MPEG 2B ) is selected, you can dial in in
parallel on the second channel with a telephone or a 7-kHz Audio Codec -
independent from the coding. On this channel, the Audio signal can be mon-
itored with 3,1 kHz (G.711) or 7 kHz (G.722) bandwidth in real time (no de-
lay).
NOTE
Further details concerning the
Security
Mode can be found in the special
manual for MAGIC AC1 Security .