AWD124 Rev. 1 (03/09)
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870 and/or 8870 Series Handsets
For use with the 142 or 142A Series Switchboard
Master Station - showing 2-Wire Modifications
On each 870 and/or 8870 handset you need to put a jumper wire between terminals '2' and '4/5'.
On each 870 and/or 8870 handset you need to put a diode (model #027 or equivalent) between terminals
'1' and '6' with the stripedside of the diode going to terminal '1' (polarity must be observed).
This wiring diagram must be used in addition to the separate 142 or 142A series installation manual(s).
All wiring is #22 AWG, unless otherwise noted.
Observe all local and national electrical and building codes.
All terminals and connections shown may not be in the same order as they appear on the equipment.
INSTALLATION GUIDELINES and GENERAL INFORMATION:
42 Central Drive, Farmingdale NY 11735-1202
(631) 777-5500 Fax: (631) 777-5599
TOLL-FREE Technical Line 1-800-666-4800