I am seeking a simple expedient path to a "VoicePort" audio digital
sampler to RS-232 port driver.   Parameters for this device and
complementary receiver of reverse process are:
Telephone handset Audio into A/D converter sampling 8-bit bytes at
22,050 sample rate with serial data fed to UART(16550) outputting 57,600
bit rate to MAX-232 RS-232 driver.
Also needed is the reverse process for RS-232 data RX to D/A to decoded
audio from a SEPARATE port.
I would prefer standalone hardware for dedicated function without the
usual bulk of programming and debugging associated with 57k port speeds
to keep UNBROKEN STREAM OF DIGI-AUDIO DATA FLOW IN REAL TIME.
Basic Device Layout:
     TX
AUDIO-->ADC0831------->16550------->MAX232--------------->RS-232-->
               (A/D conv.)          (UART)     (Level Shifter)

  RX AUDIO<--DAC0808<--74HC154<--16550<------MAX232<-----RS-232--<
                         (D/A conv.)      (ser/par)    (UART)    (Level
Shifter)
                           (convert)

I am reasonably sure about this design, but not experienced at how to
program/initialize the 16550 UARTs.  Perhaps init/config data can be
loaded thru a parallel port buffered into the UART.  This design was
chosen to avoid lengthy programming of any CPU's
because these VoicePorts are a mere FUNCTIONAL expediency to demo voice
thru RS-232 .
     Also, if there is a more timely design to accomplish the objective,
I would be open to consider it.  The above design is not mandatory.  I
considered a PIC 16C74 with A/D and serial I/O with drawbacks of extra
hardware and interface for 8-bit D/A reverse process and extra load of
programming.
     Tried to link PC soundcard Record & Play A/D-D/A functions to
RS-232, but 57,600 port speed precludes anything but custom Visual C++
pgrm to pipe .wav streamed I/O thru Win32 API (Win95 platform).

Does anyone have a better notion, preferably in specific chipset readily
available?

TIA,
-John
sirejohn@bbs-la.com