LANtastic(TM) Voice(TM) Adapter

The LANtastic Voice Adapter lets you save sound and speech on disk
for playback later. 

When used with supporting software, it provides the capability to
digitize sound, preserving it in nearly its original fidelity. And
whereas most voice cards tie up your computers during operation,
the LANtastic Voice Adapter works completely in the background. 

When you use the adapter with LANtastic NOS version 3.0 and above,
you can send voice messages across your LANtastic network. It's
easy. Just pick up the telephone-style handset provided with each
Voice Adapter, bring up a handy on-screen menu, and talk. You can
use the Voice Chat feature to carry on a realtime conversation, or
the voice message can be saved in digital format for playback later
- just like regular E-mail.

Developers. Make your own software laugh, sob, growl, warble, wail,
sing and talk with the LANtastic Voice Adapter and the LANtastic
Voice Programmer's Interface(TM) (sold separately). The LANtastic
Voice Programmer's Interface is a set of routines for interfacing
to the LANtastic Voice Adapter. Using a set of simple, straight -
forward commands, you can create educational and training programs
on disk or CD-ROM that actually give verbal instructions to
students. You can develop voice mail, "talking" software demos,
music synthesis and much more. Or add high-fidelity sound effects
and music to any program. Using the tape in and out jacks on the
voice adapter, you can record from a CD player, tape recorder,
microphone or other external sound source, then play it back
through an amplifier and speakers. The VPI(TM) is sold directly
through Artisoft. For more information about LANtastic VPI, call
602-293-6363. 

LANtastic Voice Adapter Specifications.

Features:
* Full-duplex operation (simultaneous record and play)
* 8-bit companded D/A and A/D conversion for clean, noise-free
      reproduction
* Line level audio in and out for connecting external sound source, 
  recorder or amplifier

Hardware compatibility:
* IBM PC, XT, AT, PS/2 model 30, 30-286 and compatibles, and      
  386-based IBM PC bus compatibles.

PC requirements:
* One floppy drive
* 8-bit expansion slot
Software requirements:
* PC DOS 3.1 or higher (3.2 not recommended)
* LANtastic NOS version 3.0 and above when used on a LANtastic    
  local area network

Dimensions:
* Height: 4.0 inches (including brackets)
* Length: 5.0 inches
* Depth: 0.8 inches

Power requirements:
* +5V @ 330mA
* +12V @ 33mA
* -12V @ 33mA

D/A conversion:
* 8 bits/sample
* mu255 law companded

Sampling rate:
* 7990.1Hz

Bandwidth:
* 200Hz - 3400Hz

Selectable jumpers:
* J1: Enable DMA channel 1
* J2: Enable DMA channel 3
* Both channels may be enabled to support full duplex operation

External interface:
* P1-Handset, electret, 0.2V peak-to-peak
Standard female, modular telephone handset jack (M4P4C). Electret
microphone input and output are supported on this connector.
Telephone handset is provided. Electret microphone input is
reproduced in the earphone as long as power is supplied to the
board to give the handset the sound of a "live" line.
* P2-LINE IN, 100K Ohms @ 2.5V
Female, RCA-type audio jack. Accepts a standard audio signal for
digitizing from an external source. May be connected to a CD
player, tape recorder, or other external device. This signal is
mixed with the microphone input from P1 and is reproduced in the
earphone.
* P3-LINE OUT, 2.2K Ohms@1.2V
Female, RCA-type audio jack. Provides a standard line-level audio
signal. May be connected to a tape recorder or an external
amplifier to record or broadcast the output signal.

Voice Programmer's Interface:
* Available to developers directly from Artisoft
* The VPI is a set of routines for interfacing to the LANtastic
Voice adapter. VPI uses a structure called the Voice Command Block
(VCB). This block is similar to an NCB or MCB in the NETBIOS. It
contains pointers to blocks of data which can be used for PLAY or
RECORD. Commands can be no-wait which means control returns to the
calling program immediately while the VPI works in the background.
When the VPI command completes, the user's POST routine is called.
 
Basic VPI Routines:
Adapter_Status    Find out about the Voice adapter
Reset             the Voice adapter
Deinstall         Takes VPI out of memory
Cancel            Cancel a pending VCB
Send              Sends a buffer to PLAY channel
Silence           Sends silence to PLAY channel
Receive           Receives a buffer from RECORD channel
Threshold         Wait for sound to reach a certain loudness and then
                  begin Receive from RECORD channel