Quote:"The Houghton central office had 4,000 lines – from number 1 up to number 4,000. If your phone number was, for example, Houghton 2855 -  that was your line (jack) on the switchboard…2855. 
 
On lines with up to four parties (common in those days), everyone on the line had the same number – followed by a party line letter of either J, M, R or W.  The party line letter told the operator which ringing key to use and how many “rings” were needed. “J”= 1 ring; “R” = 2 rings. Ringing on the opposite side of the line used “M” = 1 ring; “W” = 2 rings. Therefore, if you see phone numbers like 185-J, 185-M, 185-R and 185-W, you know they are all on the same party line. 
 
There were a few rural multi-party lines still in use in the Range towns back then. Like four party service, everyone on the line had the same number but with a different party line letter + ring numbers at the end. Here is how a Trimountain rural line looked in June of 1962: 
 
[For example, for] Line number 2580: 
Party 1     2580-J1  = 1 ring 
Party 2     2580-J2  = 2 rings 
Party 3     2580-J3  = 3 rings 
Party 4     2580-J4  = 4 rings 
Party 5     2580-R-1-1 = 1 long + 1 short rings 
Party 6     2580-M1 = 1 ring 
Party 7     2580-M2 = 2 rings 
Party 8     2580-M3 = 3 rings 
Party 9     2580-M4 = 4 rings 
Party 10   2580-W-1-1 = 1 long + 1 short rings 
 
NOTE: Multiple rings like “W11” are “W-1-1” & not “W-eleven”.""
The two wires connected to your phone were called