Comfort GSM not answering but SMS is working

[slychiu]

Edited as all the CRs had got lost!

The forum does not handle CRs. Please add a space before CR to allow the new linbe to display

[caravanboy]

[user=1]slychiu[/user] wrote:

Please power off and on the gsm module to let it reconnect.

  Is there a specific way that I should do this - do you mean just pull the connector providing power and data?

slychiu wrote:

Can you check if your sim card supports VoLTE?

what is your UCM GSM Firmware version (from Modules tab)[highlight= rgb(255, 255, 255);]

 My UCM GSM firmware is 7.245


 I was told the SIM card supports VoLTE but I\'ve not independently verified that.

[slychiu]

Yes pull out the 4 way cable

[slychiu]

Yes pull out the 4 way cable

[caravanboy]

I pulled out the cable to the UCM GSM and replaced it. The module then behaved correctly and did answer my calls.

Still sounds like a bug though if it was able to send and receive SMS messages but had stopped receiving phone calls?

I also noticed that after re-inserting the cable the red D£ LED was flashing rapidly until it answered my call (then it went solid) but after the call ended it went back to flashing slowly. Any reason for the difference?

I still could not sign-in even with the newer 7608A module that I bought, but that is a separate issue. I need to do some more investigation and reply on my other topic about that.

[caravanboy]

Unfortunately all the phones in our house are Samsung (varying ages from 2023 to very old models). None of them have the Android settings to set long DTMF tones.

Comfort does recognise some of the DTMF tones (with both old and new modules) as pressing * is recognised to interrupt the voice message but the sign-in digits are rarely recognised. Since getting the new module in January I have managed to sign in only once which is very disappointing as this was the whole purpose of buying the new phone?

I have downloaded Google \'Phone\' app to try instead of the default Samsung \'Phone\' but it seems that DTMF doesn\'t even work at all on their app!

Does anyone have a suggestion of a reliable way to get Comfort to recognise DTMF from Samsung mobiles? It is not as though they are an obscure brand!

[slychiu]

I personally have a Samsung (A54) and do not have any problem with recognising DTMF tones. The A7608 module is responsible for detecting DTMF tones, and not Comfort.
I can dial to your GSM Module from my phone in Singapore and check if I have the same problem. If you can temporarily add a user code eg 1234, and send your number to support@cytech.biz, I can let you know the result

[slychiu]

Have you seen this advice from Samsung for Long DTMF tones?

https://www.verizon.com/support/knowledge-base-304273/

[caravanboy]

Yes, I have seen posts about short and long DTMF settings but I have a Samsung S23 Ultra with the latest software update (March 2025) and on the Phone \"Other Call settings\" there are no DTMF length options :-(

I have emailed you the GSM phone number and temporary user code.

[slychiu]

sorry can you resend the email. I saw it last night but was unable to find it today