Modem Code for V.22bis
ILLICO is offering Digital Signal Processing software for implementing the CCITT
data modem standard V.22bis. This software modem can replace conventional data modem chip sets in applications
where a general purpose TMS320C5x/C54x/C3x/C4x DSP is available on a dedicated or shared basis. Digital sample
interpolation permits direct "all digital" interface with 64 Kb/s PCM data streams and avoids conversion
to an analog signal. For analog environments, a simple Mu or A-law codec can provide the analog interface in many
applications. Page oriented internal RAM addressing allows easy implementation of multiple independent modems in
one processor. All available code was created by ILLICO's staff and can be customized to support special interfaces
and special signal processing requirements. The target applications for these software modems are data relay in
FAX relay systems, embedded communications, and network control. Application layer features such as dialing, error
correction protocols, compression, and Hayes-type control interface are not included.
Processor and System Requirements
* * *
ILLICO Copyright 1995-2009. All Rights Reserved.
Phone: (650) 493-5678