So if We connect with another system, Same TR cabn be used?
Normally as described by RB, the first system it is performed manually by ABAPers.
Normally you are upgrading a landscape, so its your DEV system you do it manualy. Then move on to QA and use those TP's for SPAU and SPDD and same for PRD.
If you are talking about other systems, be very carefull that all components versions match up perfectly from the source to target.
Its a dangerous game..make sure your backups are good.