Hardware manual

5901 High Speed Dialup Modem Hardware Manual
October 19, 2007
47
10.4.7 +ER=n - Error Control Reporting
This extended-format numeric parameter controls whether or not the extended-format "+ER: "
intermediate result code is transmitted from the modem to the DTE.
S95 bit 3 is reset to 0 for +ER=0 and is set to a 1 for +ER=1. The more recent setting of +ER or S95
bit 3, and the W command setting, determines the actual error control result code reporting (see S95
Parameter and W Command).
Command: +ER=[n]
n A decimal number corresponding to the selected error control option:
0 Error control reporting disabled (no +ER intermediate result code transmitted). (Default.)
1 Error control reporting enabled (+ER intermediate result code transmitted).
Reporting Current or Selected Values
Command: +ER?
Response: +ER: n
Example: +ER: 0 for the default setting
Reporting Supported Range of Parameter Values
Command: +ER=?
Response: +ER: (n range)
Example: +ER: (0,1)
+ER: n
The +ER: n reported represents the current (negotiated or renegotiated) modem-modem error control
type. If enabled, the intermediate result code is transmitted at the point during error control
negotiation (handshaking) at which the modem has determined which error control protocol will be
used (if any), before the final result code (e.g., CONNECT) is transmitted. The format of this result
code is:
The +ER intermediate result code, if enabled, is issued after the Modulation report (+MCR and
+MRR) and before the Data Compression Report (+DR).
Command: +ER: n
n An alphanumeric code corresponding to the selected protocol.
NONE Error control is not in use.
LAPM V.42 LAPM protocol is in use.
ALT MNP is in use.
Example: +ER: LAPM
10.4.8 +ES=x,y,z - Error Control and Synchronous Mode Selection
This extended-format command specifies the initial requested mode of operation when the modem is
operating as the originator, optionally specifies the acceptable fallback mode of operation when the