Dumb, Leased Line
The following chart describes what DTR does for Dumb Leased Line mode of
operation. The rows present the possible operating modes, and the columns
describe events supported by the &D commands.
Operating Mode &D0 &D1 &D2
Power-up goes off-hook goes off-hook Waits for DTR going
and connects and connects off-to-on
DTR ignores all goes on-hook on Disconnects on
changes on-to-off on-to-off
Lost Carrier Stays off-hook goes on-hook goes on-hook
Next Action Starts Goes off-hook Waits for DTR going
handshake and connects off-to-on before
off-hook.
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Terminal Ready Option page.
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