ATA 190 series support for DECT phones

[deansemail]

Hi

I am a complete novice, please be gentle..

I recently recievd an ATA 191 or 192 from my British Telecom as part of a new installation.

The idea was to use my existing hardwired infrastructure with the new VOIP through the HUB.

It works fine for simple handsets and it mostly works (can recieve calls) with my DECT handsets, but with the DECT handsets if I try to initiate a call, it gives a dial tone, but after about 3 seconds, this is replaced with beeping, like an engaged tone.

No one at BT seems to know much about the ATA devices and they are telling me that the ATA will not work with a DECT PSTN handset.

Can someone please confim or deny this please? I just need ammunition to get thier support team to help.

[Leo Laohoo]

Do you have any other analogue handset that you could try (in place of the DECT handset)?

[deansemail]

Hi Thanks for your question.

Yes, I have tried with a basic handset and everything works fine.

My DECT handset works on a PSTN line, so it is not that at fault.

BT told me that the ATA and DECT handsets are incompatible, but that does
not seem reasonable.

[deansemail]

Some further information, in case anyone can help.

If I try to use the DECT handset, I pick it up and:

I get a dial tone for 3 seconds.

This then changes to (what seems to be) an Engaged tone for 9 seconds.

This then changes again to a faster, slightly higher pitch tone.

Any ideas?

Can we at least discount the BT claim that 'the ATA is incompatible with
DECT phones'?

Does any one have an ATA working with a DECT phone?

[Leo Laohoo]

So if you plug a different analogue phone, it works.  Your specific DECT does not work. 

Can you find a different make/model DECT unit and try? 

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@deansemail wrote:
Does any one have an ATA working with a DECT phone?

---

Where I work, we have several hundred of these ATAs and we've never had a complaint like this.  We have various models of DECT handsets and corded handsets.  

[deansemail]

Thanks Leo

The information about the fact that it should work with a DECT phone is very
useful.

I have now tried it with 3 different DECT handsets and all react in the same
way:

I get a dial tone for 3 seconds.

This then changes to (what seems to be) an Engaged tone for 9 seconds.

This then changes again to a faster, slightly higher pitch tone.

[jari.suosilta]

Timers? And fast you are sending 1st digit from DECT to ATA when you dial?
I mean does it timeout due not getting digits fast enough.

[deansemail]

Hi Jari

Thanks for your reply, I believe that you are on the right track, but it is
not this specific thing.

If I pick up the phone and listen without dialling at all, I get a dial tone
for about 5 seconds, then (what sounds to me to be) an engaged tone, then
about 20 seconds later the tone becomes faster and higher pitched (maybe a
'pay tone', if I were on an old pay phone.).

These timings and tones are identical whether I dial a number or not.

I believe that the problem is something to do with the handshaking between
the ATA and the handsets and that the ATA should be slowed.

It seems that the information that everything is working and the dial tone
is playing, is not being passed back to the ATA.

Hopefully this all makes sense.

[deansemail]

Thnanks to everyone who answered and tried to help.

After much tooing and froing we found the resolution:

The 'Interdigit Long Timer' was set to 10, we had to increase this to 12 and everything now works.

Thanks again.