Most IP telephony applications require the use of multiple types of voice codecs, which are used to digitally compress voice signals, to save on bandwidth requirements. While voice signals from the Public Switched Telephone Network (PSTN) always come in the form of the G.711 codec, the VoIP terminal equipment and networks support a variety of different voice codecs including such as G.729, G.726, AMR, G.722, iLBC, etc. VoIP infrastructure most often needs to include the capability to mediate between endpoints supporting different codecs, yet this functionality often requires digital signal processing tasks that are often costly, resource-intensive and can affect the quality of the voice signals if it introduces too much latency and delay.
The D150 card allows to convert numerous simultaneous channels of transcoding from one type of codec (e.g. G.711) to another (e.g. G.729), without affecting latency or using up precious host CPU resources. The card allows running up to 30, 60, 120, 240 or 400 channels of any-to-any voice codec conversion, with unmatched quality. All codecs are fully indemnified; no additional licensing is required for their use.
Available Form Factors
The D150 is available in 3 form factors:
 |
 |
 |
| D150-ETH |
D150-BOX |
D150-PMC |
| The Ethernet card (ETH) has an Ethernet port and is installed inside a computer server, it acquires its power from the power supply |
The boxed enclosure (BOX) is an Ethernet card with a metal enclosure and an external power supply. These enclosures can be stacked up to 14 instances on a single 19 inch rack mount |
The Mezzanine Card (PMC) allows hardware manufacturers to integrate the D150 transcoding solution via the PMC standard (IEEE 1386) |
Product Features
- 30 to 400 transcoding sessions
- Field Upgradeable - Simply pay the difference between models and receive a license key to upgrade to more sessions
- No Additional Licensing Fees for Codecs
- Works on Asterisk and FreeSWITCH
- Compact 2U Form-Factor, Stand-Alone Boxed Enclosure or PCI Mezzanine Card Option
- RJ45 Ethernet Interface
- Codec Support:
- G.711
- G.722
- G.722.1
- G.726
- G.729AB
- iLBC
- GSM-FR
- GSM-EFR
- AMR
- AMR-WB (G.722.2)
- L8 (Linear 8K)
- L16 (Linear 16K)
Software
- Support for Asterisk and FreeSWITCH
- Transcoding API in C
- Media flows in and out of Ethernet ports
- Codecs supported: G.711, G.722, G.722.1, G.726, G.729AB, GSM-FR, GSM-EFR, AMR, AMR-WB (G.722.2), iLBC
Dimensions
- D150-ETH: 133.3mm x 58.4mm
- Compact factor for use in restricted chassis
- Includes low profile bracket for installation in 2U chassis
- D150-BOX: 139mm x 70mm x 29mm
- D150-PMC: 149mm x 74mm
Power
- D150-ETH: 2A @ 5V (10W) via molex cable
- D150-BOX: 2A @ 5V (10W) via external power supply
- D150-PMC: 2A @ 5V (10W) via PCI interface
Network Interfaces
Sample Applications
- Call Centers and Remote Agent Pools
- Hosted iPBX / IP Centrex
- Distributed PBX
- IP Network Peering
- SIP Trunking
- VoIP Gateways
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