Ericsson ZAT 19.2 Operation Manual page 226

9.3 Operating modes
Below is a description of each major operating mode (\Nx commana):
9.3.1 Normal mode
Normal mode. No protocol support, buffered
mode with speed conversion capabilities (see
chapter 8)
This mode allows only connections without internal protocols but
with buffering and flowcontrol. It also allows speed difference
between the terminal and the modem (see +C command).
9.3.2 Direct mode:
« a f Direct mode
This 'mode connects the terminal directly to the internal modem
chip. This means that all internal buffers are bypassed and both
speed conversion and local flowcontrol are disabled.
9. 3. 3 Fixed reliable mode :
| Fixed protocol mode will connect in LAPM
towards modems with V.42, and MNP support.
=| If anon protocol modem tries to connect the
. | connection will be disconnected after the
"; | protocol handshake attempts.
«| Fixed MNP mode. As fixed protocol mode,
" = [but will not accept LAPM requests.
. - ] Fixed LAPM mode. As fixed protocol mode
but will not accept MNP requests.
These modes allow only protocol connections. Any connections
without V.42 will cause a disconnect. The difference between the
modes is only which protocols that are allowed (LAPM and MNP,
MNP only or LAPM only). All flowcontrol and buffering are as in
normal mode.
LZTR104006 R1.00
Zat 14.4/14.4-7 and 19.2/19.2-7