Multitech MultiModem MT5634ZPW-PCI Owner's Manual page 68

Owner's Manual
The modem model and serial numbers are silkscreened on your
modem. The software versions are printed on the diskette labels.
Type ATI4<CR> in terminal mode to display the modem
firmware version.
Please note the status of your modem in the space below before
calling tech support. This includes screen messages, diagnostic
test results, problems with a specific application, etc.
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