If not acceptable,because they are different values.
The traffic offered, could be understand as , the maximun trafic that one LInk can provide to users.
The traffic carried, means the behavior of the usesr (Making a call during a period time). or the trafiic carried in one cne link
Then you can have this statement.
TC= Traffic carried
TO= Traffic Offered
1.- The TC could be TO
Becasue whe you overpass the traffic offered you will have call lost in the system.