[TheForge] OT - Telcom stuff

[Andy Vida]

Bob Ehrenberger wrote:

> Not CPM, PCM... Pulse Code Modulation. :)

> ----Reply
> Our switch was TDM - Time Division Multiplex controlled by a PDP/11.

	That's PCM. :)
> 
> The program had to assign time slots for the connections, Xmit/Rcv pairs.

	Ah, so you were coding layer 1 and 2.  That's the stuff I
	always liked.  Anything above layer 3 got boring and too
	commercial for my R&D tastes.

	-Andy