How do I recover my voicemail access number?

trying to setup visual voicemail on blackberry passport
why is the voicemail access number different from my phone number?

and what steps do i follow to setup visual voicemail properly?

Thanks

i think every voicemail number is different for each provider. a common one is '123' though. If its visual voicemail though it will be totally different I suspect. You need to look it up on your carriers support site , or call them and ask.