UART AT Command hang when make a phone call

IoT Modules RC76
14

for AT+KSLEEP=2 or AT+KSLEEP=1, you can workaround the issue by keep sending AT after “ATD1234567;”
Is it correct?

Another way you can try is to use AT+KSLEEP=0, after "ATD1234567; ", you can pull down the DTR and pull up the DTR again.