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TC400B is a half-length, low-profile PCI 2.2-compliant card for transforming complex
VoIP codecs into simple codecs.
The TC400B is a bundle of the half-length, low-profile PCI-2.2 compliant
TC400P base card and the TC400M voice processing module. The TC400B is designed
to handle, in dedicated DSP resources, the complex codec translations for
highly compressed audio as would otherwise be processed by Asterisk in software.
Asterisk, in software and with Digium G.729a
licensing, is capable of transforming the G.729a codec into other codecs
for the purposes of call origination or termination, bridging disparate
calls, or VoIP to TDM connectivity. These transformations in software are
very expensive, in terms of MIPS, and require a substantial amount of CPU
time to accomplish. The TC400B not only relieves the CPU of this duty, freeing
it up to handle other tasks or to complete additional call processing; but
also provides Asterisk with the capability of bridging G.723.1 compressed
audio into other formats, a capability not previously possible.The TC400B
decompresses G.729a (8.0kbit) or G.723.1 (5.3kbit) into u-law or a-law;
or, compresses u-law or a-law into G.729a (8.0kbit) or G.723.1 (5.3kbit).
The TC400B is rated to handle up to 96 bi-directional G.729a transformations
or 92 bi-directional G.723.1 transformations. The TC400B does not require
additional licensing fees for the use of these codecs nor does it require
the registration process associated with Digium's software-based G.729a
Currently no information available.
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