Status Registers
10-22
V.3600
Operating Mode — S70
The
S70
register determines the protocol operating mode and action
taken on an MNP link attempt failure. LAPM is assigned highest
priority.
Example: With
\N7
selected the modem tries an LAPM connection
first; if unsuccessful the modem tries an MNP connection; if also
unsuccessful, the modem connects in normal mode. Modes allowing
protocol fallback are referred to as auto-reliable.
Operating Mode Status — S71
The
S71
register indicates the level of error controlling protocol. This
register is for reference only.
Bit
Value
Command
Description
2-0
000
001
010
011
100
101
110
111
\N
\N1
\N2
\N3
\N4
\N5
\N6
\N7
Normal
Direct
MNP only (reliable)
MNP or normal (auto-reliable)
LAPM only (reliable)
LAPM or normal (auto-reliable)
LAPM or MNP only (auto-reliable)
LAPM or MNP or native (auto-reliable)
3
0
1
\M
\M1
Disable V.42 fast detect
Enable V.42 fast detect
7-4
--
--
Reserved
Bit
Value
Command
Description
2-0
000
001
010
011
100
101
110
111
--
Protocol not active
Protocol negotiation in progress
MNP level 2 active
MNP level 3 active
MNP level 4 active
MNP level 5 active
LAPM active
LAPM with data compression active
7-3
--
--
Reserved
Содержание V.3600
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