S86 - Connection Failure Cause Code
Description
This read-only register indicates why a connection failed or was otherwise
concluded (e.g., the desired protocol was not negotiated, carrier loss,
normal hang-up, etc.). The modem places a value in this register whenever
a NO CARRIER result code is returned. Although several events may contribute
to the connection failure, S86 reports the first event which caused the
failure.
The value of S86 is set within 10 ms of the NO CARRIER result code (the
end of the trailing Ctrl-J) and is unchanged until the next NO CARRIER result
code is sent to the DTE.
Type
value; read only
Value range
listed below, Default value: 0
Stored by &Wn
no
Displayed by &V
no
Value Meanings
1 Normal hang-up from FAX call
2 Reserved
3 Reserved
4 Lost carrier
5 Feature negotiation did not detect an error-control modem at remote end.
6 Other error-control modem did not respond to feature negotiation message
sent by this modem.
7 Other modem is synchronous-only, this mode is asynchronous only.
8 Modems could not find a framing technique in common (async or sync).
9 Modems could not find a common protocol.
10 Feature negotiation message sent by remote modem is incorrect.
11 Synchronous information (data or flags) not received from other modem.
Modem waits 30 s before hanging up.
12 Normal disconnect initiated by remote modem.
13 Remote modem did not respond after many transmissions of the same message.
Modem attempts connection 10 times before giving up.
14 Protocol violation occurred.
15 Compression failure.
16 Speed indicated by S37 did not match any speeds indicated by S109.
17 Hang-up was due to S116 time out.
18 Inactivity timer S30 caused hang-up.
19 Long space disconnect hang-up.
20 X.25 network rejected the offered X.32 ID.
21 X.25 network uses different security option.
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