Technical specifications Features Cordless telephone (DECT GAP standard) for internet and landline calls Supports HD telephony (7-kHz G.722 codec) for natural sound Internet telephony SIP-compliant in accordance with RFC 3261 (in combination with the FRITZ!Box) The ideal complement to all FRITZ! box models with a DECT base station FRITZ!Box functions are easily configured and operated from the...
> https://en.avm.de/products/phone/fritzfon-c6/technical-specifications/
Features HD telephony for unbeatable sound FRITZ!Fon supports HD telephony for crystal-clear calls. By transmitting the entire frequency spectrum of the human voice, it achieves outstanding sound quality. DECT Eco DECT Eco phones stop emitting radio frequency (RF) energy when in standby mode and/or docked in the base. In the event of an incoming call or if it's no longer in standby mode, FRITZ!Fon...
> https://en.avm.de/products/phone/fritzfon-m2/details/
Technical specifications Features Cordless telephone (DECT-GAP standard) for Internet and fixed line telephony Internet telephony SIP-compliant in accordance with RFC 3261 (in combination with the FRITZ!Box) Ideal supplement for all FRITZ!Box models with a DECT base station Convenient configuration and operation of FRITZ!Box functions on the handset: Answering machine, alarm, call diversion, baby...
> https://en.avm.de/products/phone/fritzfon-m2/technical-specifications/