[asterisk-biz] Digium vs. Sangoma Transcoding card

[Moises Silva]

On Fri, Oct 29, 2010 at 9:30 AM, Ben Klang <bklang at verendus.com> wrote:
> On Oct 29, 2010, at 9:21 AM, asterisk at dovid.net wrote:
> Unfortunately the Sangoma transcoder integration with Asterisk is still
> significantly harder to integrate than the Digium product.  The Sangoma card
> has a loopback network interface and audio is streamed to it via RTP,
> meaning that you have to have a private, local subnet for each Sangoma
> transcoder card.  However, the big advantage is that Sangoma can get up to
> 480 sessions in a single card (D100-480) vs. the ~120 that you get with
> Digium.  If you are needing large concurrencies then Sangoma has a strong
> advantage.

Another difference, and in fact, this is part of the reason why more
configuration is required, is that you can use a single card for
multiple Asterisk and/or FreeSWITCH boxes through RTP. The Asterisk
and FreeSWITCH codec modules are RTP nodes that just request
transcoders to the central server (which can be in the same box, or
another box), then all the transcoding is done thru RTP.

For example, you can have 10 Asterisk boxes using the transcoding
card, and just one of the boxes has the card physically plugged.

The card also is multi codec. You get G722, G729, iLBC, GSM etc.

Moises Silva
Senior Software Engineer
Sangoma Technologies Inc. | 100 Renfrew Drive, Suite 100, Markham ON
L3R 9R6 Canada
t. 1 905 474 1990 x128 | e. moy at sangoma.com