INSYS Modem 56k small EU 2.1
S Registry
71
S40*
Break handling and MNP5 block size
Bit
Meaning
Bit 0
Reserved
Bit 1
Reserved
Bit 2
Reserved
Bit 3-5
Break handling
Break handling
0: like
AT\K0
1: like
AT\K1
2: like
AT\K2
3: like
AT\K3
4: like
AT\K4
5: like
AT\K5
Bit 6-7
MNP block size
MNP block size
0: 64 characters
(
AT\A0
)
1: 128 characters
(
AT\A1
)
2: 192 characters
(
AT\A2
)
3: 256 characters
(
AT\A3
)
S41*
Compression settings: Compression type, retrain
Bit
Meaning
Bit 0,1
Select compression type
Compression selection
0: No compression (
AT%C0
)
1: MNP5
(
AT%C1
)
2: V.42bis
(
AT%C2
)
3: MNP5 or V.42bis (
AT%C3
)
Bit 2
Auto retrain
Auto retrain control
0: No auto retrain (
AT%E0
)
1: Auto retrain
(
AT%E1
)
Bit 3
Reserved
Bit 4
Reserved
Bit 5
Reserved
Bit 6
Fall back/fall forward
FB/FF control
0: No FB/FF
1: FB/FF
(
AT%E2
)
Bit 7
Reserved
S46*
V.42bis data compression
S46=136 No data compression
S46=138 V.42bis data compression on
S48*
V.42bis Connection setup protocol
S48=0
Only LAPM connection possible
S48=7
LAPM or MNP 4 connection
S48=128 Connection protocol as laid down in S36
