Specifications

Glossary 87
Signal processor
A digital signal processor providing 64 Kbytes of high speed static
random access memory, and a shared-memory interface to perform speech
processing. A Texas Instruments TMS320C25 or TMS320 family chip that
is part of the DTC04 module.
SLD interconnect
A serial bus used to transmit voice, data and control information.
Software
Programs executed by the DECvoice system to perform a chosen or
required function. (Compare Hardware.)
Store
To enter information into a storage device, such as a disk, or into memory.
Subscriber Line Datalink (SLD) Interface
The SLD interface controls communication with the telephone network.
The Intel SLD is a three-wire interface used for synchronous data
transfer.
Subsystem
A section of microcode that performs certain DECvoice functions.
DECvoice has five default subsystems: system, audio, text-to-speech,
stored voice, and word recognition.
Switch hook flash
Any interruption in telephone line current caused by pressing the switch
hook on a phone.
System firmware
A combination of DECvoice hardware and software that performs specific
voice processing operations.
Telephone Line Interface (TLI)
That part of the DECvoice hardware and microcode that controls
communication between the DECvoice module and the telephone line.
Text to Speech
The act of converting written text into speech. The DECvoice text-to-
speech subsystem performs all of the text-to-speech tasks.