Recently installed 2 SIP Trunks, although they worked
fine something left me intriged.
After creating an incoming route for each of the SIP Trunks,
the message "This Trunk is not being used by any Route"
was shown in the "Trunks" view for one of them. For the other trunk, the message "this Trunk is being used in 1 route"
was correctly shown.
