Well either BS7671 needs to develop a section on network installation, and include things like ensuring cable impedance, high bandwidth termination methods, special kinds of splice etc, and also sections on telephones, broadband,  TV antenna cables and door bells, audio video and every other thing you can think of, or more sensibly should say - We have other standards that apply to those. Use them instead.  I think it is a hiding to nothing to assume that the entire body of standardization can all be encompassed by one BSI document, when other organizations have been doing a perfectly good job elsewhere.
Mike

Well either BS7671 needs to develop a section on network installation, and include things like ensuring cable impedance, high bandwidth termination methods, special kinds of splice etc, and also sections on telephones, broadband,  TV antenna cables and door bells, audio video and every other thing you can think of, or more sensibly should say - We have other standards that apply to those. Use them instead.  I think it is a hiding to nothing to assume that the entire body of standardization can all be encompassed by one BSI document, when other organizations have been doing a perfectly good job elsewhere.
Mike

mapj1 said:

Use them instead. 

BS 7671 refers to the telecomms installation standards .in the respects you state. Those standards refer back to BS 7671 for matters of electrical safety (and provide context on that also). The installation standards work together in this respect.

Some of the product standards, however, are not aligned with the basic safety publication IEC 61140.