Is there an external VM access number, other than 123 and own number?

It would be nice when the wife's out, and I'm home and I don't pick up calls intended her, she'd get notified on her cell and can check the VM without calling home.

I'm doing comparisons on some providers that I am trialing and this is one of the features, if it exists, that I don't see published on Voipo. On another provider, it's not published either but looking at the call logs, I can tell that an external VM number exists and it works when used from the outside. On Voipo, I don't even see 123 listed on outgoing call records.