pdf 991.006.01 I1-se Popular
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991.006.01_I1-se.pdf
PBX Systems - Range Chart - Trunk and Station Conductor Loop
Ranges for PBXs Connected To No. 1 Crossbar Central Offices Having
1300-Ohm Subscriber Conductor Loop - 400-Ohm Talking Battery Feed
Circuit - AC-DC or Superimposed Ringing (84-88V AC Component) - Office
Voltage of 48V (Floating), Issue 1, 1960-03-01
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