A Switch order is a combination of the redemption of units in one scheme and purchase of units in another scheme within the same AMC. However, in case of switch order both the buy and sell leg of the transaction are carried out by the AMC without having to reroute the invested amount to your bank. Hence it is a transaction that is carried out within the AMC.
This is also why AMCs allow switch orders only within the funds from the same AMC.
Kindly note that the AMC can levy an exit load if units are switched/redeemed within the exit load window. You can refer to the "Others" tab on the fund details page for exit load information. You can also refer to the latest fund documents published by the AMC for information regarding exit load.