using 2 command 2000's

greenspun.com : LUSENET : Wiring for DCC : One Thread

In early instructions I read that you could use 2 2000's to get up two 20 address. Was this an option or a jumper ? Anyone know anything about this ?

-- Gaylord J Kidd (joekidd@fuse.net), January 04, 2004

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