Telephone Handset Wiring Diagram. 746r and 8746) and sa/saw 102180 (telephone no. Telephone wiring diagram diy home doing your own phone how. RJ9 Y Splitter for Telephone Handset from www.hqtelecom.com Web it appears to be an old entryphone handset the new bell handset has connections marked z t 0 r 1. Web modular connectors are […]