Hi. Physical trunks are part of routes. You have a group of trunks going to one carrier, that could be a route. It could be outgoing for local calls, could be a separate route for outgoing long-distance calls to a different carrier. You could have a separate incoming route. You could also simply have only one route to handle both incoming and outgoing traffic.
Use the LTRK command to match list out all the trunks you have, what's their LEN and what route they belong to.