Transcoding Card CT200E - User Manual
Version: 1.0
Page 3
Overview
The CT200E Series cards are PCI-E base cards. The CT200E Series cards
are designed to handle, transcoding in dedicated DSP hardware, it supports
multiple voice codecs, to digitally compress voice signals and save on
bandwidth. This function would otherwise be done by Asterisk in software.
VoIP communication needs the capability to mediate between endpoints
supporting different codecs, but this requires DSP functionality that are
resource-intensive, and can affect the quality of the voice signals, and may
introduces latency and delay.
Asterisk, is capable of transcoding some codecs into other codecs for the
purposes of call origination or termination, these transcoding in done by
software and is very CPU intensive using substantial amount of CPU power.
This CT200E card will add transcoding capability and provides excellent voice
quality and transcoding capacity, without affecting latency or using up
precious host CPU resources
The CT200E card comes with bundled software to make the product
architecture independent. For example the CT200E Series cards decompress
G.729a (8.0 Kbit) or G.723.1 (5.3 Kbit and 6.3 Kbit) into u-law or a-law; or,
compress u-law or a-law into G.729a (8.0 Kbit) or G.723.1 (5.3 Kbit and 6.3
Kbit).
The CT200E Series cards are capable of handling up to 200 transcoding
resources. All codecs are fully indemnified no additional licensing is required
for their use.
Allo.com Transcoding card CT200E is telephony PCIe card used for various
PBX software, e.g. Asterisk, FreeSWITCH, etc. with compatible drivers,
Features
•
Capable of doing the various codec transcoding.
•
Suitable for PCIe 1.0 slots
•
Provides up to 200 transcoding resources.
•
Supports G729, G723, a/u law, G726, ilbc (G722, AMR, AMR-WB,
G722.1 HD etc will be implemented in future releases.)
