10.16. Controlled Trunk and Line Selection 
See also Chapter 196,
"CTLS - Controlled trunk and line selection network-wide" and Chapter 195, "CTLN -
Prevent controlled line and trunk selection in an external system".
With the feature Controlled Trunk and Line Selection (CTLS) you can
seize and check trunk circuits and subscriber line circuits selectively
by directly entering the appropriate PEN.
CTLS is available for trunk and tie lines as well as SLMA and TMOM
connections.
