After spending almost 3 weeks with both the FRITZ!Fon C4 and C5 DECT cordless telephones by AVM we believe these are a must for compatible FRITZ!Box owners.
AVM FRITZ!Fon C4 & C5 DECT Cordless Telephones Review
User manual AVM FRITZ!Fon M2 International (English - 72 pages)
AVM FRITZ!Fon C6 - buy at digitec
AVM FRITZ!Fon C4 & C5 DECT Cordless Telephones Review
AVM Fritz!Fon C5 DECT Comfort Telephone, Black, International
AVM FRITZ!Fon C5 Schnurloses VoIP DECT-Telefon Handset - Schwarz
AVM FRITZ!Fon C5 Test
AVM FRITZ!Fon C6 - buy at digitec
AVM FRITZ!Fon C6 - buy at digitec
AVM Fritz! Fon MT-F Cordless Extention Handset DECTGAP SIP