SimCom SIM7500 Series At Command Manual page 295

Or
AT+CIPFILTERSET=<enab
led_flag>
Defined values
<link_num>
A numeric parameter that identifies a connection. The range of permitted values is 0 to 9. This
parameter is used for multi clients.
<enabled_flag>
A numeric flag parameter that show the <link_num> connection whether or not to use the IP
filter feature. The default value is 0.
0: disable the IP filter feature.
1: enable the IP filter feature.
NOTE:
1. The execution command must be executed before opening
2. If you want to use the PPP dial and socket data at the same time, set the IP filter flag
enabled. In this usage, the PPP dial operation must be executed before the socket command.
Examples
AT+CIPFILTERSET=?
+CIPFILTERSET: (0-9),(0,1)
OK
AT+CIPFILTERSET =0,1
OK
AT+CIPFILTERSET =1
OK
AT+CIPFILTERSET?
+CIPFILTERSET: 1
+CIPFILTERSET: 0,1
+CIPFILTERSET: 1,0
+CIPFILTERSET: 2,0
+CIPFILTERSET: 3,0
+CIPFILTERSET: 4,0
+CIPFILTERSET: 5,0
+CIPFILTERSET: 6,0
+CIPFILTERSET: 7,0
+CIPFILTERSET: 8,0
+CIPFILTERSET: 9,0
OK
SIM7500_SIM7600 Series_AT Command Manual_V1.07
+IP ERROR: <error message>
ERROR
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294 2017-12-25