Differences
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Serial ports
GSM Modem
Wireless communication
Converter type
I/O
Module type
RS-232
RS-422
RS-485
GPRS
GSM Modem
Simple device
Isolated input
Industrial modem
ATC-101
 
 
 
 
 
ATC-105
 
 
 
ATC-107
 
 
 
ATC-107N
 
 
 
 
ATC-108N
 
 
 
 
I-7520A
 
 
 
I-7520AR
 
 
 
iMod-94XX-EDGE
 
 
 
 
 
STD1918H
 
 
 
 
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