I am afraid that if the equipment that isn't supplied by VM then it cannot be connected to their network, the 2nd hand Tivo box would have been de-activated, VM will not activate 2nd hand equipment as all boxes require a valid subscription and activation.
All boxes require a connection to VM's network by coaxial connection to be able to receive the TV signal as well as a network connection if you want to play recorded programs from the 1st box.
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