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snom 870


reco
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  • 2 weeks later...
Hi reco: that's a bit strange. I've had the same problem but it works fine for me on 8.4.16. Can you give some detailed explanation of the scenario you've observed? Is it linked to a particular codec by any chance?

 

hi BigBrother

 

i nailed it down.

 

the issue only appears when both calls are from different trunks.

 

all trunks are on G711.U

 

reco

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  • 2 weeks later...
  • 3 weeks later...

hi bigbrother,

 

i finally got the answer from snom:

 

We regret that our senior analyst found nothing discernible within the PCAP

that would suggest the reason for the issue. Although, professional opinion

suggests that there doesn't seem to be anything other than RTP, and the RTP

that is there seems to be encrypted. Other than that the streams look good.

 

It looks like one of the endpoints is behind NAT. NAT traversal problems is

one of the prime causes of one-way audio, especially when the called phone is

behind NAT. Snom phones do not do symmetric RTP by default, and that can

reduce the probability of success.

 

i honestly expected a little more since i got around 30 of these phones.

i understand what they are saying. i doubt though this is related to my issue.

 

if this is a NAT issue - why does it not accrue when i set a display option to a different value?

again when i set `goto_virtual_keys_state_on_activity` to `off`?

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if this is a NAT issue - why does it not accrue when i set a display option to a different value?

again when i set `goto_virtual_keys_state_on_activity` to `off`?

 

That would not convince me... Probably the only thing you can do is to try the latest beta 8.4.18 available from dms.snom.com (username beta, password beta).

 

If it would be a NAT problem it must be the router. Some routers try to be smart (or very stupid) and screw everything up. If you have a different router it is also worth a try.

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  • 3 weeks later...

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