Modem blinks but doesn't call

J

JNU

I'm writing a program to dial phone numbers through a serial modem and
I am able to send data to the modem (using javax.comm api).

However, when I send data such as "ATZ" & "ATDT 123456789" the modem
lights flicker but no number is dialled.

Can anyone help?


(I have a Diamond SupraExpress 56e Pro V.92 external serial modem)
 

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