MultiModemDSVD User Guide 4 AT Commands, S-Registers, and Result Codes
44
S86 decimal 0, 3–23 n/a When the modem issues a NO CARRIER
result code, a value is written to this register
to help determine the reason for the failed
connection. S86 records the first event that
contributes to a NO CARRIER message. Use
the S86? command to read the value.
0 Normal disconnect; no error occurred.
3 Call Waiting caused disconnect.
4 Physical loss of carrier.
5 No error correction at the other end.
6 No response to feature negotiation.
7 This modem is async-only, the other
sync-only.
8 No framing technique in common.
9 No protocol in common.
10 Bad response to feature negotiation.
11 No sync information from remote
modem.
12 Normal disconnect initiated by remote
modem.
13 Remote modem does not respond after
10 retransmissions of the same message.
14 Protocol violation.
15 DTR lost.
15 Three retrains or excessive
retransmissions when no DTR.
16 Received GSTN cleardown.
17 Inactivity timeout.
18 Speed not supported.
19 Long space disconnect.
20 Key abort disconnect.
21 Clears previous disconnect reason.
22 No connection established.
23 Disconnect after three retrains.
S95 decimal 0–15, 0 The bits in this register can be set to over-
32–47 ride some of the W command options. A bit
set to a 1 in this register enables the corre-
sponding result code regardless of the W
setting.
Bit 0 CONNECT result code indicates
DCE speed instead of DTE speed.
Bit 1 Append/ARQ to CONNECT XXXX
result code in error-correction mode.
Bit 2 Enable CARRIER XXXX result code.
Bit 3 Enable PROTOCOL XXXX result code.
Bit 4 Reserved.
Bit 5 Enable COMPRESSION result code .
Bit 6 Reserved.
Bit 7 Reserved.
Register Unit Range Default Description