Possessor of a former Gigaset C3015 Classic TRIO with answering machine, I broke a device (Gigaset C3000): these models are doing more, I bought the Gigaset C610H (additional handset) after checking its compatibility with my C 3015 on the manufacturer's website. Received on time, this unit is registered carefree with my old equipment. Much more modern, backlit, with lots of useful features (directory 150 entries, alarm clock, beautiful tones, ect. Ect.), Very nice look, I recommend this phone without any hesitation. Dailleurs, shortly after I ordered the duo pack with answering machine to replace the 3015 Classic Gigaset C I find, since, really obsolete. Everything works great.