backup multiple server into 1 tape

could you tell me if I tried to backup multiple server into 1 tape:

Example:

At 9PM the 1st job starts to backup serverA, at 10PM the 2nd job start to backup serverB and 11PM the 3rd job starts to backup serverC and so on. all of them goto a single tape.

How can I do so?

Regards,

Tho.