I'm not trying to aggravate you --
I'm just not sure what you mean when you say Data? Is it a Voice message, keypad inputs, fax, emulator or some other form of data?
Vendor calls in and after being verified, Does:
Voice Message - Vendor calls in and leave a voice recording,
Keypad inputs - Vendor selects prompts by pressing key pad on phone,
Fax - Vendor Faxes in a Request or other form,
Emulator - Vendor dials in and inputs data with a Shell or Script that you've written.
Chas2002