RE: [Asterisk-Users] Snom high SIP ping time

[Christian Stredicke]

If you ping on the SIP port the message has to go through the application layer - which takes some time considering it is an embedded system with a small CPU. That part should be ok.   It the phone becomes choppy, that problem is probably related to the RTP side. Maybe you have different packet sizes for incoming and outgoing traffic. You can get an Ethereal trace from the web interface of the phone which should show you the RTP jitter (PCAP trace). Or use a hub if you don't trust that trace. 6.1 is the latest version if you want to try the latest image (http://www.snom.com/wiki/index.php/Beta_Firmware).   Hope that helps, CS From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Hammett Sent: Monday, June 12, 2006 3:01 PM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] Snom high SIP ping time I don't know everything that's going on as someone else has been working on the project, but it hasn't really been going anywhere, so I had some questions.   We've got some Snom 320s with Asterisk 1.2.9.1 (I believe).  All was well (with a previous release), but the phones started to get real choppy.  We are also running a softphone at this location and it was fine.  The SIP qualify was returning ping times anywhere from 20 to 70 ms over a sparsely used LAN.  Command prompt (ICMP) pings were under 1 ms.  No amount of different Asterisk versions or phone firmware revisions seems to solve this.  All was well, then (as far as we know) without changes, it crapped out.   Any ideas?     ---- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com

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