How to remove a trk grp correctly

[lam85]

I have a remote g450 a DS1 card (trk grp 5) in it. I did a "list usage trk grp 5" and it's showing route patterns that are using all SIP trunks. I don't understand how trk grp 5 is listing SIP trunks in its route pattern.
Normally I see DS1 trunks in a route pattern associated that same trk grp. Can someone explain to me how this work.

[mlombardi1]

Route patterns can prioritize multiple trunk groups. The ISDN trunk may be on page two or three of the route pattern. You must remove all references to a trunk, including routes and numbering tables, before being allowed to remove it from the system.