mmllxx, your conversion depends on the type of cordless phone you are trying to use, however from what you just posted, having 1 mls (MLX)and 5 408 (408 MLX or ATL) a pin conversion will not work for you as you have no T&R cards, such as a 012 or 016.
verland, the MLX set uses pins 3-6 (White-Green)& 4-5 (White-Blue) (conforming to the 568B wiring standard), MLX Consoles and sets using adjuncts use pins 7-8 (White-Brown) for powering the DSS Console. Although local power can be provided for this, the pins are still active at the module. ATL sets, as I recall use the White-Brown pair for Page over intercom. If your customer does not plan on using this feature, you can use this pair for what-ever, but as with MLX, make sure the pair is isolated from the module (on a 66 or 110 block for example) before terminateing anything on it.