Westermo IDW-90 AT - Manual (Page 26)

26 6620-3200
S40 – General Bit Mapped Options Status (analogue)
S40 indicates the status of command options.
Default: 0 (00h) (00000000b)
Bits 0 – 1 MNP Extended Services (-Kn)
0 Disable extended services (-K0) (default)
1 Enable extended services (-K1)
2 Enable extended services (-K2)
Bits 2 – 7 Reserved.
S41 – General Bit Mapped Options Status (analogue)
S41 indicates the status of command options.
Default: 195 (C3h) (1100011b)
Bits 0 – 1 Compression selection (%Cn)
0 Disabled (%C0 )
1 MNP 5 (%C1)
2 V.42 bis (%C2)
3 MNP 5 and V.42 bis (%C3) (default)
Bits 2, 6 Auto retrain and fallback/fall forward (%En)
0 0 Retrain and fallback/fall forward disabled (%E0)
0 1 Retrain enabled (%E1)
1 0 Fallback/fall forward enabled (%E2) (default)
Bits 3 – 5, 7 Reserved.
S46 – Data Compression Control (analogue)
S46 controls selection of compression. The following actions are executed for the given
values:
S46
136 Execute error correction protocol with no compression.
138 Execute error correction protocol with compression. (default)
S48 –V.42 Negotiation Control (analogue)
The V.42 negotiation process determines the capabilities of the remote modem. However,
when the capabilities of the remote modem are known and negotiation is unnecessary,
this process can be bypassed if so desired.
S48
0 Disable negotiation; bypass the detection and negotiation phases; and
proceed with LAPM.
7 Enable negotiation. (default)
128 Disable negotiation; bypass the detection and negotiation phases; and
proceed at once with the fallback action specified in S36. Can be
used to force MNP.
S86 – Call Failure Reason Code (analogue)
When the internal analogue modem issues a NO CARRIER result code, a value is writ-
ten to S86 Register to help determine the reason for the failed connection. S86 records
the first event that contributes to a NO CARRIER message. The S86 register is only
updated when the NO CARRIER is sent as result from a broken connection to an ana-
logue subscriber. The code definitions are: