Proxy media hickups in audio
Hi all, I'm still undecided yet whether I need proxy-media or not. As I understand it, the only downside of enabling proxy-media is that early- media is not possible, correct ? (Or are there other reasons why I shouldn't use proxy-media ?) When I disable proxy-media I get little hickups in the audio on the outbound leg of the call, which are not there when proxy-media is enabled. I made pcap dumps on the ethernet interface for both in- and outbound legs, for both settings (proxy-media dis- and enabled), analyzed it in wireshark (no packetloss), but when extracting the audiostreams to .au and listening to it on my laptop, I hear the same hickups. Is there some other setting that may fix the problem of the hickups ? (Is this a known problem?) I'm running fs with -hp argument, am doing no transcoding and am using ALAW codec. Is it helpful if I put the pcap and .au files somewhere ? thanks & regards, Leon
You shouldn't use it. It has a special use case and I suspect yours isn't it. Are you doing anything with T.38 right now? /b On Mar 19, 2009, at 6:57 AM, Leon de Rooij wrote:
I'm still undecided yet whether I need proxy-media or not. As I understand it, the only downside of enabling proxy-media is that early- media is not possible, correct ? (Or are there other reasons why I shouldn't use proxy-media ?)
I'm not using T38 yet, it may be nice in the future, as long faxes over alaw just don't work properly.. And also, there are these hickups now, that I don't have with proxy- media enabled.. On Mar 19, 2009, at 2:15 PM, Brian West wrote:
You shouldn't use it. It has a special use case and I suspect yours isn't it. Are you doing anything with T.38 right now?
/b
On Mar 19, 2009, at 6:57 AM, Leon de Rooij wrote:
I'm still undecided yet whether I need proxy-media or not. As I understand it, the only downside of enabling proxy-media is that early- media is not possible, correct ? (Or are there other reasons why I shouldn't use proxy-media ?)
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Brian, I put two au files here: http://www.ldr.scarlet.nl/ua-to-fs.au http://www.ldr.scarlet.nl/fs-to-mgw.au It's a call from a Siemens SX762 (using ALAW) to FS (no transcoding) which bridges it to a mediagateway. Proxy-media is disabled on the incoming sip_profile. Both au files are extracted from the same pcap file. As you can hear, the second sample sounds bad.. Are there any flags I can set in the incoming or outgoing sip_profile that may fix this ? The server has zero load (it's a Dell R300 with 2.6.24-23-server 64 bit kernel). In fact, this was the only call going through.. FS is version 12163M thanks, Leon On Mar 19, 2009, at 2:15 PM, Brian West wrote:
You shouldn't use it. It has a special use case and I suspect yours isn't it. Are you doing anything with T.38 right now?
/b
On Mar 19, 2009, at 6:57 AM, Leon de Rooij wrote:
I'm still undecided yet whether I need proxy-media or not. As I understand it, the only downside of enabling proxy-media is that early- media is not possible, correct ? (Or are there other reasons why I shouldn't use proxy-media ?)
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I would have to have the raw pcap to make any sense out of it. /b On Mar 19, 2009, at 10:34 AM, Leon de Rooij wrote:
Brian,
I put two au files here:
http://www.ldr.scarlet.nl/ua-to-fs.au http://www.ldr.scarlet.nl/fs-to-mgw.au
It's a call from a Siemens SX762 (using ALAW) to FS (no transcoding) which bridges it to a mediagateway. Proxy-media is disabled on the incoming sip_profile. Both au files are extracted from the same pcap file.
As you can hear, the second sample sounds bad.. Are there any flags I can set in the incoming or outgoing sip_profile that may fix this ?
The server has zero load (it's a Dell R300 with 2.6.24-23-server 64 bit kernel). In fact, this was the only call going through..
FS is version 12163M
thanks,
Leon
participants (2)
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Brian West
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Leon de Rooij