AVT MAGIC AC1, Hardware & Software Manual

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PAGE 63
W i n d o w s P C S o f t w a r e
5.7.2.2 Transmission
Under Transmission all Audio and data parameters concerning the trans-
mission can be configured.
In delivery status, four standard
Transmission Modes
are available:
– Telephone : Audio transmission with 3.1 kHz (G.711). On the second B
channel, an independent telephone or 7 kHz connection can be estab-
lished.
– 7 kHz (Auto) : Audio transmission with 7 kHz (G.722). The two standard
signalling procedures ITU-T J.52 (often also named H.221 ) and SRT (Sta-
tistical Recovered Timing) are supported. On the second B channel, an in-
dependent telephone or 7 kHz connection can be established.
– MPEG 1B (Auto) : Audio transmission with ISO/MPEG Layer III or op-
tionally Layer II (order number 450305) and a data rate of 64 kbit/s (1 B).
For the signalling, the most important procedures are available. On the
second B channel, an independent telephone or 7 kHz connection can be
established. However, a second MPEG connection cannot be established.
– MPEG 2B (Auto) : Audio transmission with ISO/MPEG Layer III or op-
tionally Layer II (order number 450305) and a data rate of 128 kbit/s (2 B).
For the signalling, the most important procedures are available.
You can create further user defined transmission modes according to your re-
quirements under
User Defined
. These transmission modes are also available
when the system is controlled via the front keypad and display.
NOTE
The standard transmission modes work with AutoDynamicSync (ADS) ,
which guarantees an automatic synchronisation - also with systems from
other manufacturers. Further details can be found in CHAPTER A2 Page 137.