The industry’s highest density transcoding card — designed for optimum voice quality for high port count systems, offering from 400 to 2,000 transcoding sessions in one compact PCIe form factor!
- 400–2,000 Transcoding Sessions
- No Licensing Fees²
- Integrates in Asterisk® and FreeSWITCH®
- Works on Linux and Windows®
- Simple C API
- PCI Express
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, but this functionality often requires digital signal processing tasks that are costly, resource intensive and can affect the quality of the voice signals if it introduces too much latency and delay.
The D500 card converts 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 2000 sessions of any-to-any voice codec conversion, with unmatched quality1. All codecs are fully indemnified; no additional licensing is required for their use2.
The D500 works with both Asterisk and FreeSWITCH. With compatible drivers offered by Sangoma, these applications can use the D500 cards as seamless voice transcoding resources. Alternatively, developers and integrators can use the Transcoding API in C for their own application development.

Sample Applications:
- Hosted VoIP
- PBX with HD Voice
- IP Network Peering
- Hosted PBX
- Call Centres
1 Total port counts performance varies from codec to codec use and on the traffic mix at any given time.
2 AMR codecs need to be indemnified by integrator
| Codecs Supported | |
|---|---|
| Wire-line Applications | Wireless Applications |
|
|
Software
- Support for Asterisk and FreeSWITCH
- Transcoding API in C
- Media flows in and out of 2x GigE ports and/or PCIe bus
Dimensions
- Length: 245.2mm, Height: 106.1mm
Operating Systems
- Linux
- Windows®
Certifications
- Emissions: FCC Part 15 Class B, CISPR 22/EN55022 Class B
- Immunity: CISPR 24/EN55024
- IEC/EN 60950 safety is pending
Bus Supported
- PCIe: x1 bus width, V1.1
Power Requirements
- 24W (1.6A @ 12V; 1.5A @ 3.3V)
Operating Temperature Range
- Temperature range: 0 – 50 °C
Network Interfaces
- 2x Gigabit Ethernet ports
Production Quality
- ISO 9002
Warranty
- D-Series hardware comes with a standard 5-year warranty with product registration when purchased through an authorized Empowered by Sangoma representative
- 30-day “no questions asked” return policy
.
| SKU for PCIe Bus | Usage |
|---|---|
| D500-100e | D500 card with 1 transcoding modules, up to 400 transcoding sessions, PCIe |
| D500-200e | D500 card with 2 transcoding modules, up to 800 transcoding sessions, PCIe |
| D500-300e | D500 card with 3 transcoding modules, up to 1,200 transcoding sessions, PCIe |
| D500-400e | D500 card with 4 transcoding module, up to 1,600 transcoding sessions, PCIe |
| D500-500e | D500 card with 5 transcoding moduless, up to 2,000 transcoding sessions, PCIe |
To become an authorized Empowered by Sangoma channel partner, please visit http://www.sangoma.com/partners.
To purchase now, Contact an Empowered by Sangoma Distributor, Reseller, or Solution Partner near you. Look for the Empowered by Sangoma Logo.





