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118 posts

Master Geek

#153922 13-Oct-2014 04:52
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My 2Talk VOIP is up and working well over Vodafone's fibre service - except for one problem when I use my preferred phone handset(s). I can't send tones to voicemail systems.

In testing with an old (1980's) phone plugged into the Cisco ATA122, everything works perfectly on a number of NZ corporate voicemail systems. All good.

But when I plug in my Philips 321 base-station & wireless satellites, I can dial calls, but I get zero recognition of numeric tones by any voicemail systems. Everything else works OK (eg: dialing the actual phone number) - just no tone recognition by any answering voicemail system.

Note that these Philips handsets & base station were in daily use before the transition to VOIP - so the tones on them have been 'working' for years. Now, however, they don't over the VOIP.

Maybe they don't make it beyond the SPA122 ? But then why do the tones from the 1980's phone succeed when I plug it in with no change to any settings ?

I'm finding this a hard issue to Google - so I'd be very grateful for any pointers.

It's also not a problem that works well with a phone helpline - for obvious reasons ;-)


I'm guessing there will be settings in the ATA122 (now running the standard 2Talk config file) which may be worth playing with ?


Note - I'm running v1-3-5 firmware in the SPA122 (as I think this was a bigger/known problem when this device came out).

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29124 posts

Uber Geek

Biddle Corp
Lifetime subscriber

  #1152500 13-Oct-2014 07:31
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The Philips phone probably isn't sending DTMF tones with a duration sufficient for the SPA to decode. You can try changing the DTMF detection to normal which may improve things. If it doesn't you're basically out of options unless you want to move from RFC2833 to inband for DTMF which in itself could introduce other options.


118 posts

Master Geek

  #1152931 13-Oct-2014 15:20
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Brilliant !

Worked a treat.

Nice to be able to keep using the 4 old wireless handsets - even if their life as Skype phones is past.



118 posts

Master Geek

  #1152932 13-Oct-2014 15:21
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Sorry - should have explicitly said Thank You sbiddle - and noted that the change to 'Normal' did the trick.

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