ZyXEL Communications omni TA128 User Manual page 27

Type:
ATI1<Enter>
TA128 should respond:
TA128 USA: V 1.00a (Firmware version number)
7607 (Firmware checksum will change based on your firmware version)
OK
Once the TA128 accepts the commands that you typed, it is ready
to be programmed and ready to operate with your ISDN network.
If you do not receive any response from the device, go over your
installation procedures again or contact ZyXEL Technical Support.
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