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Knowledge document #361
FRITZ!Box 6840 LTE
This support document is available for the following products:
- FRITZ!Box 7690
- FRITZ!Box 7590 AX
- FRITZ!Box 7590
- FRITZ!Box 7583 VDSL
- FRITZ!Box 7583
- FRITZ!Box 7582
- FRITZ!Box 7581
- FRITZ!Box 7560
- FRITZ!Box 7530 AX
- FRITZ!Box 7530
- FRITZ!Box 7520
- FRITZ!Box 7510
- FRITZ!Box 7490
- FRITZ!Box 7430
- FRITZ!Box 7390
- FRITZ!Box 7360
- FRITZ!Box 6890 LTE
- FRITZ!Box 6850 5G
- FRITZ!Box 6850 LTE
- FRITZ!Box 6690 Cable
Telephony devices and automated telephone system cannot be controlled remotely
Although you can make telephone calls, you cannot remotely control telephony devices or automated telephone systems on other lines. For example, you cannot:
- Operate the automated telephone system of a telephone hotline.
- Remotely control an answering machine on another line.
- Call an answering machine connected to the FRITZ!Box and control it remotely (for example to listen to new messages).
- Enter a PIN for telephone banking.
Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.
Simply proceed as described below. After each measure, check whether the problem is solved.
1 Installing the latest FRITZ!OS
- Install the latest FRITZ!OS on the FRITZ!Box.
2 Testing different DTMF transmission methods
- Click "Telephony" in the FRITZ!Box user interface.
- Click "Telephone Numbers" in the "Telephony" menu.
- Click the (Edit) button for the respective internet telephone number.
- Select "Other provider" from the drop-down list, even if you are using a preconfigured internet telephony provider.
- Try different settings for the "DTMF transmission" or ask your internet telephony provider which setting you need to select.
- Click "OK" to save the settings.
Besides these settings, the FRITZ!Box has no influence on whether the tones are distorted when they are transmitted to the line that was called. For example, if the internet telephony provider sends DTMF tones over the voice channel, individual tones can be distorted by other signals. In this case, the FRITZ!Box cannot solve this problem.