Example image of eyePlorer eyePlorer map for 'Integrated services digital network': Basic rate interface Broadband integrated services digital network Primary rate interface Circuit switching Computer network Data Digital Packet switched network Plain old telephone service Telephone Transmission (telecommunications) Q.931 Protocol (computing) Signalling (telecommunications) Videoconferencing Local loop Data rate units Private branch exchange Public switched telephone network G.711 Digital Signal 0 Robbed-bit signaling X.25 Frame relay Modem Internet Digital subscriber line Digital Signal 1 E-carrier SS7 Dual-tone multi-frequency Multi-frequency Encode MS Codec G.722 BBC Radio 3 Broadband Internet access Asymmetric digital subscriber line Competitive local exchange carrier Polycom Sony Tandberg Direct inward dialing T-carrier Recording studio Nippon Telegraph and Telephone Telephone company BT Group United Kingdom