53 a as an interface to the non wired network segment and a protocol adapter 52 a a module 50 b is an embodiment of the present invention in which the telephone line transceiver can be implemented by a high pass filter hpf 22 a and data terminal equipment dce 23 a as also used by dichter as discussed previously fig6 shows an embodiment of a network 60 according to the present invention that includes wired and non wired segments the wired segment is based on telephone wiring 5 within a building as described in fig1 while outlets 11 b and 11 c are unchanged outlets 11 a and 11 d are replaced by outlets 61 d and 61 a respectively containing modules 50 d and 50 e respectively basic telephone service is retained by employing low pass filters lpf 21 d and 21 a in outlets 61 d and 61 a respectively the lpf 39 s are coupled to telephone connectors 12 d and 12 a respectively enabling connection of telephone devices this is illustrated by a telephone 13 a connected by connector 14 a to connector 12 a in outlet 61 a a dichter type data communication network is established by connecting data terminal equipment dte via a modem and hpf as illustrated by dte 24 b connected to dce 23 b which is coupled to hpf 22 b which is in turn directly coupled to telephone wiring 5 via connector 12 b in.