FRITZ!Fon C4 Service - Knowledge Base
Cannot operate telephony devices and voice computers remotely
Although you can make telephone calls, you cannot remotely control telephony devices or voice computers used on other lines. For example, you cannot:
- Operate the voice computer of a telephone hotline.
- Operate an answering machine on another line remotely.
- Call an answering machine connected to the FRITZ!Box and operate it remotely (for example to listen to new messages).
- Enter a PIN when using telebanking.
Note:The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS for your FRITZ!Box.
Simply proceed as described below. After each measure, check whether the problem persists.
1 Installing the latest FRITZ!OS
- Install the latest FRITZ!OS on your FRITZ!Box.
2 Testing different DTMF transmission methods
The following steps are only necessary if you are using the FRITZ!Box to conduct calls over the internet (VoIP):
- Click "Telephony" in the FRITZ!Box user interface.
- Click "Telephone Numbers" in the "Telephony" menu.
- Click the button (Edit) 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 must 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 resolve this issue.