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darklion11 at yahoo.com
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 Posted: Tue Jun 30, 2009 8:50 pm Post subject: [Freeswitch-users] Is there any license G729? |
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So what codec supports mobile phones?
jfenton wrote:
| Quote: |
Hi Edmar,
| Quote: | I need actually G729 license if there's any for freeswitch to call
mobile
phones... I already load it but has an issue on it passthrough
mode... If i
install mod_dandhi_codec it overwrites the existing G729 without
license to
a new G729 with license?
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Are you sure your mobile phones support G729? Most phones have hardware
acceleration for AMR-NB and not G729, so most of the VoIP-over-WiFi
providers use that codec instead. I believe G729 would have to be
implemented in software only (without hardware assistance) and would
drain the battery fairly quickly as a result.
As other have pointed out on the list, and just in case you missed it
mod_dahdi_codec is for use with a PCI accelerator card (the TC400B)
that Digium (http://www.digium.com/) sell and will not work without
it. With that card you can get up to 120 concurrent G729A-G711 calls.
These days you can get much better performance from pure software
codecs running on Intel/AMD systems than using the above card. We
(Howler) happen to have announced a G729A codec for FreeSWITCH a
few days ago - you can get more info here:
http://www.howlertech.com/products/howlets/
Hope that helps.
--
Regards,
Jay Fenton, CTO <jay.fenton@howlertech.com>
Howler Technologies Ltd, 11 Charlotte Mews, London, W1T 4EQ
tel: +44 207 099 7095 fax: +44 207 099 7098
http://www.howlertech.com/
http://www.linkedin.com/in/jfenton
Registered in England & Wales, Company No. 06285634
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craig at overthewire.c...
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steveu at coppice.org
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| Posted: Tue Jun 30, 2009 10:08 pm Post subject: [Freeswitch-users] Is there any license G729? |
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Edmar Cruz wrote:
| Quote: | So what codec supports mobile phones?
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The main codecs used by mobile phones are:
GSM FR The original GSM code, largely replaced by later
codecs (some VoIP stuff uses this)
GSM HR The half rate codec for GSM
GSM EFR A later improved full rate codec that largely replaced
GSM FR on GSM networks
AMR-NB The current start of the art narrowband codec for GSM
and UMTS networks
AMR-WB The wide band codec for UMTS, though most networks
seem to block it
EVRC The main codec for the CDMA networks
Each of these codecs sounds pretty respectable, and G.729 sounds pretty
respectable. However, if you transcode from one to another the result
can be pretty bad.
Steve
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rupa at rupa.com
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| Posted: Tue Jun 30, 2009 10:23 pm Post subject: [Freeswitch-users] Is there any license G729? |
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And unless you are directly connecting to the cell phone provider you are going to be converted to ULAW/ALAW to traverse the PSTN. So there is no advantage going to a native GSM codec only to have it expanded out to G711 and then back to GSM codec.
On Tue, Jun 30, 2009 at 10:05 PM, Steve Underwood <steveu@coppice.org (steveu@coppice.org)> wrote:
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darklion11 at yahoo.com
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| Posted: Tue Jun 30, 2009 10:44 pm Post subject: [Freeswitch-users] Is there any license G729? |
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I have 1 Fs and 1 Asterisk if G729 is available on Asterisk so i shall load
to G729 for freeswitch that needs a license?
Steve Underwood wrote:
| Quote: |
Edmar Cruz wrote:
| Quote: | So what codec supports mobile phones?
|
The main codecs used by mobile phones are:
GSM FR The original GSM code, largely replaced by later
codecs (some VoIP stuff uses this)
GSM HR The half rate codec for GSM
GSM EFR A later improved full rate codec that largely replaced
GSM FR on GSM networks
AMR-NB The current start of the art narrowband codec for GSM
and UMTS networks
AMR-WB The wide band codec for UMTS, though most networks
seem to block it
EVRC The main codec for the CDMA networks
Each of these codecs sounds pretty respectable, and G.729 sounds pretty
respectable. However, if you transcode from one to another the result
can be pretty bad.
Steve
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msc at freeswitch.org
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| Posted: Tue Jun 30, 2009 11:42 pm Post subject: [Freeswitch-users] Is there any license G729? |
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On Jun 30, 2009, at 8:43 PM, Edmar Cruz <darklion11@yahoo.com> wrote:
| Quote: |
I have 1 Fs and 1 Asterisk if G729 is available on Asterisk so i
shall load
to G729 for freeswitch that needs a license?
|
You need a license if you are transcoding to or from G729. If you are
just passing the media stream or you stay out of the media stream then
you do not need a license.
-MC
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