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Protocols

6-6 Modem 3600

Operating Mode \N

Select the V.42 bis mode to be used in data mode. An \Nn command

issued during command mode while a connection is in progress will not

affect the current connection but will be acted on for subsequent

connections. LAPM or MNP protocol operation is referred to as

MNP-only mode, and the auto-reliable modes allow protocol fallback.

Auto-Reliable Fallback Character %An

Select the ASCII character to be recognized as the auto-reliable fallback

character by the answering modem. During negotiation of protocol in

auto-reliable mode, the answering modem switches from reliable to

normal mode when receiving the auto-reliable fallback character from

the calling modem and passes the character to the serial port.

Enter the %An command to set the auto-reliable fallback character

(n=1-27 decimal representing an ASCII character).

Note

The modem must be set for auto-reliable mode (AT\N3,

\N5, \N6, \N7).

Command Operation

\N Normal mode — no error control; data buffered

\N1 Direct mode — no error control; data not buffered

\N2 MNP only — try MNP; disconnect if not successful

\N3 MNP or normal — try MNP; fallback to normal async

\N4 LAPM only — try LAPM; disconnect if not successful

\N5 LAPM or normal — try LAPM; fallback to normal

\N6 LAPM or MNP — try both protocols; disconnect if not

successful

\N7 LAPM, MNP, or normal — try both protocols; fallback

to normal if not successful

Command Operation

%A0 Disable auto-reliable fallback character

%An Sets ASCII character to be recognized as the

auto-reliable fallback character

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Black Box MD1000C Guia do Utilizador Página 108