AVT MAGIC AC1, Hardware & Software Manual

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S y s t e m D e s c r i p t i o n
2.1 Functionality
The MAGIC DC7/AC1 System incorporates an analogue POTS interface as
well as an ISDN telephone interface. The operating modes can be configured
by software. If the ISDN interface is used, depending on the operating mode
two independent channels are available that can be used independently from
each other.
The complete signal processing is taken over by two digital signal processors.
In this way the following functions are realised:
DSP1:
– G.711 Audio encoding and decoding
– G.722 Audio encoding and decoding
– ISO/MPEG Layer II/III Decoder
– digital Audio router, digital Audio mixer (optional)
– Signalling management (J.52, proprietary modes)
– Control of the complete system (Keypad, display, relays, TTL, RS232)
DSP2:
– ISO/MPEG Layer III Encoder (only for MAGIC AC1)
Via the main Audio channel the high quality Stereo or Mono Audio signal is
inserted or output analogue or digitally. At the same time, the command
channel can be used in parallel. If the digital AES/EBU Audio interface is
used, two separate Sample Rate Converters are available for automatic clock
synchronisation. For external clocking a clock input and a clock output are
available.
Additionally, the Audio Codec incorporates a Headset interface for Stereo
tone or Dual Channel tone with a microphone input, Limiter and 12V phan-
tom power which can be switched off.
By the integrated Audio router all input and output signals can be configured
freely. If you use the optional Software Plug In
MAGIC DC7/AC1 Mixer Tool ,
even all signals can be mixed in a flexible way.
The configuration and operation can be carried out via the front keypad and
the illuminated display .
Configuration and control is especially comfortable with the MAGIC
DC7/AC1 Windows PC Software which is included in delivery and which
communicates with the system via the RS232 interface.
The basic operating functions like accepting a call, dropping a connection and
establishing a connection with a pre-programmed number can be carried out
via three programmable
TTL contacts . Two relays are available for status in-
dication.
Optionally, the system can also be operated separately via the MAGIC
DC7/AC1 Keypad that can be connected to the RS232 interface instead of the
PC Software .