# Best solution for making a LAN with 2 untwisted lines

I need to provide a best solution for establish a LAN for old train carriages in order to transfer low quality video surveillance data.

Only existing lines are 2 wires untwisted throughout all cabins, max number of cabins are 16-18. Hopefully can achieve 100Mbps bandwidth within the LAN. High reliability.

------------   ------------  ------------
|        =========================      |
|          |   |          |  |          |
| cabin 1  |   | cabin 2  |  | cabin N  |
------------   ------------  ------------


My thoughts are:

• power line communications (like existing power line modems) attached in parallel to the bus.
• ADSL connections, where cabin N always connect to cabin N+1. wires broken into (N-1) pieces, and total (N-1) connections.
• VDSL similar concept to ADSL

Has anyone had similar experience before?

ALSO: They are moving and LAN is (digital local area network) and My application with based on UDP+TCP and IP protocols

• Power line comms may work. ADSL and VDSL are designed to run over twisted pair (the telephone system uses twisted pair). – Connor Wolf Apr 21 '14 at 15:05
• Am I correct in thinking that these "old train carriages" are stationary? If so, Joe's answer worries about things like traction motor noise which don't apply. – WhatRoughBeast Apr 21 '14 at 16:31
• Sorry they are in operation and moving. – c2h2 Apr 21 '14 at 18:26