PCBWay Supports High Precision Advanced PCBs: www.pcbway.com/
This experiment involves setting up a DC current loop so phones or modems can come alive and interact without needing a landline service.
Then an AC ring voltage is added to the simulated phone line so the phones or modems can ring when on-hook.
This is the first step in a bigger project where more complete functionality will be added to the system.
Schematic/Files: github.com/Gad...
PCBs at PCBWay.com:
www.pcbway.com...
Registered Jack details and pinouts
en.wikipedia.o...
Telephone interface info and circuits
www.epanorama....
www.epanorama....
Phone line info
massis.lcs.mit....
www.elenco.com...
TIA-968-A Technical Requirements for Connection of Terminal Equipment to the Telephone Network
web.archive.or...
CS-03 Part I - Requirements for Terminal Equipment (TE) and Related Access Arrangements Intended for Direct Connection to Analog Wireline Facilities
www.ic.gc.ca/e...
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