So, use Google voice or setup your own w/ Twilio (try all numbers), and have a work cellphone and a home cellphone, a one-way pager (for when you are traveling)

So, use Google voice or setup your own w/ Twilio (try all numbers), and have a work cellphone and a home cellphone, a one-way pager (for when you are traveling), and another travel phone without a battery that you would use if necessary, based on the pager message?