在电气特性方面，规定了与网络正确互通所需的设备要求。适用于连接家庭、办公室和类似室内专用线路的语音和非语音设备。交叉引用:BS 4778:第1BS 4778部分:第2BS 6312BS 6320BS 6789部分:第3.1节CITT建议B。12CCITT建议G.122CCITT建议P.53CCITT建议Q.23取代BS 6305:1982，该建议在立法中引用时仍然有效。

Specifies those requirements for the apparatus, in terms of the electrical characteristics, necessary for correct interworking with a network. Applies to both speech and non-speech apparatus for connection to exclusive lines for household, office and similar indoor use.Cross References:BS 4778:Part 1BS 4778:Part 2BS 6312BS 6320BS 6789:Section 3.1CCITT Recommendation B. 12CCITT Recommendation G.122CCITT Recommendation P. 53CCITT Recommendation Q.23Replaces BS 6305:1982 which remains current as it is cited in legislation.