In the "New Termination Codes for True Digital 56K Card" section it says:
Call Circuit Closed
This could be generated by any of the following reasons.
- Remote modem, on-hook condition.
- Three invalid login attempts.
- Sudden phone line termination.
- Remote modem powered off.
Normal LAPM Disconnect
This reason indicates a normal V.42 disconnect packet was received, and
is a normal call tear down.
On Thu, 14 Aug 1997, Marc Powell wrote:
> Got some new disconnect information it seems with 3.7. Anybody know what
> these mean exactly? My guess is that Circuit Disconnect is similar to
> Lost Carrier. How about LAPM Disconnect?
>
> M0 READY UNKNWN NONE NONE 36 1 CIRCUIT
> DISCONNECT
> M1 READY UNKNWN NONE NONE 24 1 LAPM
> DISCONNECT