Apparatus for telephone communication; apparatus for telephone networks; apparatus for transmitting data via the telephone; automatic telephone exchange apparatus; automatic test instruments for monitoring telephone lines; computer apparatus for recording telephone calls; digital telephone sets; digital telephone switching apparatus; electrical door entry apparatus in combination with a telephone; electronic telephones; extension leads for telephones; intercom key apparatus for connection to telephone networks; key telephone apparatus; key telephone instruments; multifunctional telephones; portable telephone sets; portable telephones; private telephone exchange apparatus; push button telephone dials; stands for telephones; telephone answering apparatus; telephone answering machines; telephone apparatus; telephone apparatus for communication by sound; telephone apparatus for the recording of sound; telephone apparatus for the reproduction of sound; telephone apparatus for the transmission of sound; telephone appliances; telephone cables; telephone call management apparatus; telephone call monitoring apparatus; telephone connecting cords; telephone cords; telephone equipment; telephone handsets; telephone handsets for domestic use; telephone handsets incorporating microphones; telephone intercom apparatus; telephone listening devices; telephone number lists (electronic); telephone outlets; telephone recorders; telephone sets; telephone stands (parts of telephones); telephone station sets; telephone subsets; telephone switchboards; telephone switching apparatus; telephone switching instruments; telephones incorporating answering machines; telephones incorporating clocks; telephones incorporating intercommunication systems; wire telephones