[asterisk-users] Transcoding question

[Jeff Brower]

Jim-

> There will be up to 150 phones so there will be 300
> channels when they are all on the phone at one time.
>
> I will be using a current 1.4 version.

That's a lot of channels for Asterisk... IIRC the TC400B transcoding card is rated at up to 96 G729 channels.

Can you clarify your recording requirement?  Do you mean you want to record compressed (G729) channels, or
uncompressed (G711 or 16-bit PCM)?  You could try to avoid transcoding by using softphones that can do G729, then
you'd have a pass-thru situation -- but if you need to record uncompressed .wav files, then this wouldn't work.

-Jeff

> On Mar 22, 2010, at 5:05 PM, Rafael Prado Rocchi wrote:
>
>> How many simultaneous channels?
>>
>> Rafael Prado
>>
>>
>>> -----Original Message-----
>>> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
>>> bounces at lists.digium.com] On Behalf Of Jim Dickenson
>>> Sent: segunda-feira, 22 de março de 2010 2:33
>>> To: Asterisk User MailList
>>> Subject: [asterisk-users] Transcoding question
>>>
>>> We are getting ready to install a client that uses g729 when talking to
>>> their SIP provider to minimize bandwidth usage. We are going to want to
>>> be able to record the calls using AMI monitor actions into wav sound
>>> files. All the phones are soft phone running on Windows XP systems.
>>>
>>> Questions I have are what would the best codec be to have the soft
>>> phone use since, as I understand it, in order to mix the audio
>>> something will need to be transcoded. Can a two CPU quad core xeon 2GHz
>>> system handle the transcoding load or would if be better to have a
>>> daughter card handle the transcoding.
>>>
>>>
>>> --
>>> Jim Dickenson
>>> mailto:dickenson at cfmc.com
>>>
>>> CfMC
>>> http://www.cfmc.com/