[GreenKeys] Associated Press box

[Harold Hallikainen]

>
> 	The wire services eventually decided it would be cheaper and
> more reliable to replace the leased local DC telegraph loops for each
> wire with one or more of the VFT demod boxes... and lease audio circuits
> that eventually had 22 or 24 different "wires" on one leased voicegrade
> data circuit.   This allowed adding wires at a customer site (or
> removing them) without requiring any telco changes or circuit
> reconfiguration.

When I started in broadcasting (1970) our wire service machine had a demod
sitting on the shelf under the model 15. You could listen on the line and
hear a bunch of FSK channels. The loop supply was built into the demod.

Harold



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