I do not know who has to deal with the IP conversion as yet but who instead of a dear relative fall always the emergency or other people on the phone even though you had the right number is certainly well as annoyed as me! I was so refused einzustampfen my old phone and just because an IP conversion was necessary! The Sinus A205 Supports this option and is for two power conversions ready! I highly recommend this phone if you have no great claims each put your heart is struggling with the IP CONVERSION! Analog or IP Bassierend with sinus A205 you are connected correctly! 5 stars for the standard telephone that in the future if more recent changeover of the network operator are also a few more years in the house prepared!