Digium TCE400B 1TCE400BLF プリント

TC400 Series - Voice Processing 

Features 

TC400M Voice Processing Module

TC400P - Half-Length Low-Profile PCI 2.2+ 

3.3/5.0V Card

TCE400P - Half-Length Low-Profile PCI-Express 

x1 Card 

Includes Codec Licensing and Indemnification 

120 G.729a Transformations 
92 G.723.1 Transformations 

Requirements 

DAHDI 2.2.0 or greater and 

Asterisk 1.6.0.10 or greater

Linux Kernel 2.6 

Available PCI-Express or PCI Slot 

Target Applications 

Media Gateway 

Conferencing Server

IVR Server 

Distributed Office PBX 

Call Centers 

Codec Support 

G.729a - 8.0kbit/s

G.723.1 - 6.3kbit/s (decode-only) 

5.3kbit/s (decode/encode)

G.711 µ-law 

G.711 a-law 

Version 1.7 / 8 

April 2010 

The TCE400B is a bundle of the half-length, low-profile PCI-

Express x1 TCE400P base card and the TC400M voice 

processing module. The TC400B is a bundle of the half-length, 

low-profile PCI 3.3/5.0V TC400P base card and the TC400M 

voice processing module. The TCE400B and TC400B are 

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 TCE400B and TC400B 

not only relieve the CPU of this duty, freeing it up to handle other 

tasks or complete additional call processing, but also provide 

Asterisk with the capability of bridging G.723.1 compressed audio 

into other formats, a capability not otherwise possible. 

The TCE400B and TC400B decompress G.729a (8.0kbit) or 

G.723.1 (5.3kbit/6.0kbit) into G.711 u-law or a-law and compress 

G.711 u-law or a-law into G.729a (8.0kbit) or G.723.1 (5.3kbit). 

The TCE400B and TC400B are rated to handle up to 120 

bi-directional G.729a-only transformations or 92 bi-directional 

mixed-mode G.729a/G.723.1 transformations. The TCE400B 

and TC400B do not require additional licensing fees for the 

use of these codecs nor does it require the registration process 

association with Digium’s software-based G.729a codec licensing. 

TCE400B 

TC400B