Ericsson ZAT 19.2 Operation Manual page 123

+813 EQM Disconnect level
Default: 120
Range: 0-255
EQM ( Eye Quality monitor ) will monitor the quality of the
received carrier if register+S13 is set to a value different from
zero.
EQM =0 'The signal !evel is very good for data transmission
EQM=255 The signal level of the carrier is far too low.
EQM monitor is active in the following configurations:
600 Baud V.22
1200 Baud V.22
2400 Baud V.22 bis
4800 Baud V.32
7200 Baud V.32
9600 Baud V.32
42000 Baud V.32 bis
14400 Baud V.32 bis
16800 Baud V.32terbo
19200 Baud V.32terbo
Setting +S13 to a high value (150 or higher) causes the modem
to disconnect at a poor carrier. Setting +S13 to a lower value
(10-50) may cause a disconnection at a relatively high line
quality.
The vatue of the line quality is continuously calculated and
stored in the register +$15.
The modem disconnects if the EQM monitored value (available
in +S$15) is larger than the EQM Disconnect level defined in
+$13.
To set a correct value for the +$13
=Set +$13 to a high value (100-255)
= Establish a normal connection with the remote modem
= Send the escape code (+++), wait for result code OK.
= Enter the command:
AT+S157p%|
Repeating the command, the line quality may vary,
LZTR104006 R1.00 4-19
Zat 14.4/14.4-7 and 19.2/19.2-7