telephone does not transfer with internettelefonie “selection-gropes” with hotline

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hello together,

I had today try a hotline to call. with carpo everything did not go itself without problems, over CO2 however could I in the language/selection menu by keyboard “weiterhangeln”.
know you that lies and/or. know you at all, what I mean?
do not know unfortunately the expert understood for this…

are grateful for each answer

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Search times in the forum for “DTMF”.

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Guude, Quotation:

Quotation of the cathedral Eifel [….] over CO2 however I could not do me in the language/selection menu by keyboard “weiterhangeln”.

You tell us with which device configuration you this please more exactly tried.


HP: Please accustom you also the employment of the SHIFT key on, because so better readable texts develop. (You participate nevertheless already so long.)

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Hello,

thanks you for the first answers.

I use those Fritz! Box 7170 with the most current firmware.
The configuration for O2-VoIP is to be seen on the screen SHOT:

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Guude, Quotation:

Quotation of the cathedral Eifel [….] The configuration for O2-VoIP is to be seen on the screen SHOT:

Nevertheless so far ok looks.
And now ask still the information:
Which telephone did you merge under Telefoniegerte.?

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At “HAIR DRYER 1” is attached Siemens a SL780.