[asterisk-users] US-based echo test servers?

[Darren Sessions]

Another thing you may want to do is try a simple ping test to the far  
end host. While this may not always be a reliable way to test lag  
given that the far end maybe just a proxy and your RTP may be  
terminating to another device, it still should give you a good idea  
what your lag times are at least on the signaling end of things. You  
could also do a traceroute to see how many hops your having to jump  
through as well.

You could use a tool like ngrep to actually see the sip signaling and  
copy out the media gateway from the SDP if you really wanted to, and  
do a ping on that.

I've done extensive work with international voip origination and  
termination, and typically I haven't had any problems unless it's  
going over satellite (lag) or there is a problem at the far end  
(usually pdd or quality issues).

If things keep up, I'd even consider running top during a call to see  
what kind of utilization your local server is at just to make sure  
something isn't wrong there either.

Hope this helps,

- Darren


_____________________________

dmsessions at gmail.com
http://www.darrensessions.com
_____________________________




On Aug 18, 2008, at 10:41 AM, Nikhil Nair wrote:

> Hi,
>
> I'm running a small Asterisk server in the UK, just for personal use.
> I've been experimenting with various VoIP providers for international
> calls to PSTN numbers, particularly to the US (often California).  My
> results, to date, have been very variable indeed, so much so that I'm
> considering getting a suitable card and using the PSTN.
>
> I have found a VoIP provider with an excellent reputation, and it  
> gives
> very good quality.  However, I seem to get quite a bit of delay at  
> times,
> enough to make conversation awkward.  As the setup at the far end  
> was not
> completely trivial, I'm not 100% sure the problem was in my  
> connection,
> but I'd like to test that.
>
> Are there any US numbers I can call to get an Asterisk-style echo  
> test?
> Ideally, a California-based numnber, so I can try to call it from an
> ordinary PSTN phone here, and compare calling via VoIP, and see if  
> there's
> an appreciable difference in the delay/quality.  I don't anticipate  
> using
> this for very long, so it doesn't necessarily need to be a free  
> service.
>
> Failing that, does anyone have access to a US-based Asterisk server  
> which
> would allow me to make connections to its echo test?  Presumably, if  
> I had
> this, I could rent a PSTN number from a US-based provider, and point  
> it to
> the appropriate SIP/IAX address.  I expect my total usage would be  
> just a
> few minutes, though having the facility available for a few weeks  
> would be
> helpful, to allow me to play around with various options.  Again,  
> I'd be
> willing to pay a modest amount for this.
>
> Thanks in advance for any suggestions!
>
> Best wishes,
>
> Nikhil.
>
>
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