I'm so terrible at articles! Do we say " Alert notification can be delivered via SMS, Fax, Voice messages or can be observed online via Internet."? Or via the internet? However, via fax, voice message, ... sounds ok to me. (I'm for via internet here myself.)

Thanks in advance,

Odd. I agree with your reasoning, LL... but the internet sounds more 'normal' to me. I don't know why-- perhaps because it has become such a pervasive presence in our lives? It is a thing rather than a medium.
Thanks, MM.