[ih] More terminology (Was: multi-protocol routers, bridges)

[John Levine]

It appears that John Day via Internet-history <jeanjour at comcast.net> said:
>The phone system has always separated control and ‘data’ in separate networks. The drawing of planes originates with ISDN

Oh, no they didn't.  Until the 1970s they sent control signals in-line as multi-frequency tones, after a
2600 Hz alert tone.  That's how blue boxes worked.

R's,
John