SPA5XXG and odd ring tone

Answered Question
Jun 20th, 2010

Hi All,

I have both a SP504g and a SPA502G on 7.4.4 Firmware which generate an odd ringing sound when making a call to a local extension on my asterisk server. However, when calling an external number through the same PBX, the ring sounds normal.

The ring tone I hear on the calling phone sounds like the dialtone being played with inturruption of the ring tone or put another way, there is a background drone of dial tone while the ring tone plays over the top.

If I SIP trace the extension call and compare it to the external call, I see the Internal call sends back a 'SIP/2.0 180 Ringing ' message while the external call uses a 'SIP/2.0 183 Session Progress' response. Is this a bug in the firmware?



Correct Answer by icastrov about 6 years 8 months ago

What's the value you have set in the "Sticky 183" parameter?

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Overall Rating: 5 (1 ratings)
icastrov Mon, 06/21/2010 - 01:04


Basically the difference is that the device isn't playing the local ring back tone when receiving the "183 Session Progress" message but the one coming from the network (early media), hence the differences compared when you received the 180 Ringing when calling an internal extension since this message will trigger the local ring back tone configured in the phone's Regional Tab.



Roland_Pope Mon, 06/21/2010 - 01:36

OK, thanks for the explanation.

So I can understand the reason for the tone differences due to locally generated ring back tone vs early media tone, but I have a a number of different SPA9xx phones which have exactly the same ring back cadence settings '400@-19,450@-19;*(.4/.2/1+2,.4/.2/1+2,2/0/0)', and they don't behave in this way. I get the correct ring back tone without the background dial tone drone. Any ideas what may be happening here? Does anyone have this same issue?



Correct Answer
icastrov Mon, 06/21/2010 - 02:48

What's the value you have set in the "Sticky 183" parameter?

Roland_Pope Mon, 06/21/2010 - 13:48

Sticky 183 is set to default, which is No, but setting it to Yes does not make any change to this issue.

Roland_Pope Wed, 07/14/2010 - 15:08

Is anyone out there able to test this out and see if they have this same problem too?

I have a customer chasing me for a solution, and at this point, I believe is it a problem on the 502G phones themselves as none of the other 40 odd SPA922 phones on the same system exibit this issue.



Roland_Pope Mon, 12/06/2010 - 13:24

Just bumping this thread to add that this is still an issue under the latest 7.4.6 firmware too.


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