Description: The exttogroup table contains all associations of extensions to groups. To allow for extensions being in arbitrary groups as well as groups containing any number of extensions it is necessary to implement an extra table holding that informations and is done right here. Currently the table has only 3 columns (beside the index) where two of them hold an id either, one an extension id the other a group id, and the last column currently serves solely for the purpose of deleting rows.

Deleting a row is done by setting pabxTerminalLock to value delete.