[Blink] "Stalker Voice" when calling mobile numbers

Adrian Georgescu ag at ag-projects.com
Wed Mar 23 11:53:21 CET 2011


Something must be not working right when using the AVM box in between.

That box stays in the middle and transcodes. 

If is not too much to ask can you try the following and compare the results:

1. Use Blink with other SIP service provider like a public SIP service and call other end-points. Do not pass the traffic through the AVM box. Does this work? 
2. Use other SIP client in place of Blink behind AVM and compare them 
3. Can you call the test numbers from Blink 3333 and 4444 passing though the AVM and without it?

Maybe other people from this mailing list can also suggest other approaches to debug this problem.

Adrian


On Mar 23, 2011, at 11:34 AM, Klaus Meßlinger wrote:

>> Klaus,
>> 
>> Please paste the text from the Window -> Logs -> RTP window when you make the connection.
>> 
>> Adrian
> 
> Adrian,
> 
> this is the text when I call the mobile no. with *all* RTP options checked (in the order iLBC, G722, PCMU, PCMA, GSM, speex). 
> 
> New Audio session To: <sip:+49172xxxxxx at fritz.box>;tag=E7FE87323C9F6BDE
> Audio RTP endpoints 192.168.178.24:50000 <-> 192.168.178.1:7090
> Audio session established using "G722" codec at 16000Hz
> Remote SIP User Agent is "AVM FRITZ!Box Fon WLAN 7320 (UI) 100.04.89 TAL (Nov 25 2010)"
> 2011-03-23 11:16:28 To: <sip:+49172xxxxxx at fritz.box>;tag=E7FE87323C9F6BDE: RTT=3 ms, packet loss=0.0%, jitter RX/TX=4/20 ms
> 2011-03-23 11:16:32 To: <sip:+49172xxxxxx at fritz.box>;tag=E7FE87323C9F6BDE: RTT=3 ms, packet loss=0.0%, jitter RX/TX=4/20 ms
> 
> This is when I get the stalker voice. (My mobile no. x'ed out manually. "fritz.box" is resolved to my router's IP address.)
> 
> When I choose G722 exclusively (all others unchecked), Blink dials, but quits as soon as I answer the mobile. No log shown, then.
> 
> 
> And this is the log when I uncheck all but iLBC:
> 
> New Audio session To: <sip:+49172xxxxxx at fritz.box>;tag=3CAF83444BC50DC0
> Audio RTP endpoints 192.168.178.24:50004 <-> 192.168.178.1:7090
> Audio session established using "iLBC" codec at 8000Hz
> Remote SIP User Agent is "AVM FRITZ!Box Fon WLAN 7320 (UI) 100.04.89 TAL (Nov 25 2010)"
> 2011-03-23 11:22:14 To: <sip:+49172xxxxxx at fritz.box>;tag=3CAF83444BC50DC0: RTT=3 ms, packet loss=0.0%, jitter RX/TX=3/9 ms
> 
> This is when I get the bad sound quality (but no stalker voice).
> 
> As I mentioned before, this is only for mobile connections.
> 
> A retest with my landline/VoIP handset - all options checked - resulted in this:
> 
> New Audio session To: <sip:+496xxxxxx at fritz.box>;tag=0532507FEDE418EA
> Audio RTP endpoints 192.168.178.24:50002 <-> 192.168.178.1:7090
> Audio session established using "G722" codec at 16000Hz
> Remote SIP User Agent is "AVM FRITZ!Box Fon WLAN 7320 (UI) 100.04.89 TAL (Nov 25 2010)"
> 2011-03-23 11:28:32 To: <sip:+496xxxxxx at fritz.box>;tag=0532507FEDE418EA: RTT=2 ms, packet loss=0.0%, jitter RX/TX=4/20 ms
> 2011-03-23 11:28:32 To: <sip:+496xxxxxx at fritz.box>;tag=0532507FEDE418EA: RTT=2 ms, packet loss=0.0%, jitter RX/TX=4/20 ms
> 2011-03-23 11:28:42 To: <sip:+496xxxxxx at fritz.box>;tag=0532507FEDE418EA: RTT=2 ms, packet loss=0.0%, jitter RX/TX=3/11 ms
> 
> The result was also very poor (mixture of stalker/bad sound), but this can be due to the fact that I called out using one of my three numbers to call another one (Blink to handset).
> 
> Klaus
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