Will network cable and phone extension interfere ?

Straight forward question.

If I lay a telphone extension cable from master socket to another access point following the same route as an existing network cable will they interfere with each other ?

The network cable is carrying data from a modem so already converted from the "raw" signal from master socket. The telephone cable will be a straight forward hard wired in cable from the master. Both ending at a dual phone/lan socket on a wall.The cable will be / is external grade as it goes along outside walls.

If you mean a cable carrying ethernet data, it should fine

No.

In reply to a post by MHC:

No.

An answer from MHC on this sort of topic should be good enough for anyone.

or from anyone who regularly sees phone signals carried on the centre pair of ethernet LAN cabling

As I answered - NO it will not interfere. Although I should add a caveat ... unless there is a fault.

There will be cross talk but the level will be so low and the levels measureable in dBn or dBp (dB nanowatt/picowatt) it will not cause interference.