You need to setup the co for a disa call. Section 40 button 7. Set it for 24 hour. When you call into that line you must enter the DISA default password; then you get an intercom dial tone. Then just dial the extension number of who you want to reach.

It is possible, you are just using line 6 for DISA use only then.


Tip and ring, the work of the devil!