The Leviton Telephone Line Distribution Module (TLDM) manual does not come with a schematic or port map for ports like "2,1" or "1,2,3,4" or "1,3". I had no idea what "2,1" on a port meant. it turns out they have interesting wirings you should know about so you can do your job. so I mapped it out with a Platinum Tools VDV Mapmaster and documented it for you here. I double-checked it. if there are any errors here, please let me know about it so I can make corrections. thanks.
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