D82JCTUSWREF Intel, D82JCTUSWREF Datasheet - Page 6

• Manufacturer Part Number: D82JCTUSWREF
• Manufacturer: Intel

Specifications of D82JCTUSWREF

• Lead Free Status / Rohs Status: Supplier Unconfirmed

6
Datasheet
The D/82JCT-U board processes voice with a
Motorola DSP56303 voice-processing engine. The
DSP resource receives voice and fax via the CT612
chip. The Motorola DSP56303 processes the digitized
voice data using firmware loaded in code/data RAM.
Each DSP56303 performs the following signal analysis
and operations:
For outbound voice, the DSP performs the following
operations:
The dual-processor combination also performs
outbound dialing and call progress monitoring
When recording speech, the DSP can use different
digitizing rates from 24 Kb/s to 64 Kb/s as selected
by the application for the best speech quality and
most efficient storage. The digitizing rate is selected
on a channel-by-channel basis and can be changed
each time a record or play function is initiated.
Outbound signal processing is the reverse of
inbound processing.
Enables automatic gain control (AGC) to compensate
for variations in the level of the incoming audio signal
Applies an ADPCM or PCM algorithm to compress
the digitized voice and save disk storage space
Detects the presence of tones — DTMF, MF, or an
application-defined single or dual tone
Uses silence detection to determine if the line is
quiet and the caller is not responding
Expands stored, compressed audio data for playback
Adjusts the volume and rate of speed of playback
upon application or user request
Generates tones — DTMF, MF, or any application-
defined general-purpose tone
Transmits an off-hook signal to the telephone network
Dials out (makes an outbound call)
Monitors and reports results
Intel
— line busy or congested
— operator intercept
— ring, no answer
— or if the call is answered, whether answered
®
by a person (PVD), an answering machine
(PAMD), a fax machine, or a modem
Dialogic
®
D/82JCT-U PBX Integration Board
The DSP-processed speech is transmitted via the
control microprocessor to the host PC for disk storage.
When replaying a stored file, the microprocessor
receives the voice information from the host PC via a
shared buffer memory and passes it to the DSP. The
DSP then sends the digitized voice to the digital
duplexer in PBX format for transmission to the PBX.
Signaling data (on-/off-hook, ringing, calling number,
and special feature signaling data) is converted from
PBX message format by the command processor,
passed to the onboard control processor, and transmitted
to the application via a dual-port shared RAM and
the host PCI bus.
An onboard control processor manages the flow of
information between the voice engine and the host
PC. The control processor controls all operations of
the D/82JCT-U board and interprets and executes
commands from the host PC. The processor handles
real-time events, manages data flow to the host PC
to provide faster system response time, reduces PC
host processing demands, processes DTMF and
PBX signaling before passing them to the application,
and frees the DSP to perform signal processing.
The control processor and the host PC communicate
via the shared RAM that acts as an input/output
buffer, increasing the efficiency of disk file transfers.
The RAM interfaces with the host PC via the PCI
bus. All operations are interrupt-driven to meet the
demands of real-time systems. When the system is
initialized, firmware is downloaded from the host PC
to the onboard code/data RAM and DSP RAM to
control all board operations.
The traffic controller ASIC (TCA) is the interface to
the Intel486 GX processor that handles all peripheral
devices (CT612, DSP, HDLCs, PBX interface) and
host PC functions across the PCI bus. The D/82JCT-U
board is plug-and-play enabled. The board ID/slot
number configuration is handled exclusively by
software, using a configuration manager. The
assigned board ID/slot number is presented on a
hexadecimal display located on the PCB bracket.