FRITZ!Box 6590 Cable Service - Knowledge Base
Although the FRITZ!Box is not CAT-iq certified, it supports many of the services and functions defined in CAT-iq. For example, the FRITZ! function "HD telephony" complies with the new standard and is therefore fully compatible with all CAT-iq-based products for HD telephony available on the market. CAT-iq 2.0-compliant cordless telephones from other manufacturers can also use convenience functions such as alternating between calls, 3-party conferences, CLIP/CNIP, and accessing the FRITZ!Box telephone book and call list.
In addition, the FRITZ!Box and FRITZ!Fon models offer a whole range of additional functions that currently cannot be implemented with the CAT-iq standard. For this reason, AVM does not feel that certification is necessary at the moment, nor do we have plans to seek it.