10.16.4. Service Information 
- The user interface is uniform for the selection of lines and SLMA circuits.
For the necessary dialing information the AMOs TACSU, SCSU, TSCSU and
TDCSU are displayed.
- Any CTLS input must start with the specification of a PEN.
- Within a CTLS input it is possible to change once from the input
of PENs to station number dialing.
- The system reactions after every input of a PEN inform the user of
the status of the dialing destination or any operating errors.
- In addition to authorization assignments, CTLS is classed as a service
case and therefore every call of the application is logged. A protocol
message is output for every application (maintenance message F4624 in
text form).
- In the originating node, this protocol message contains the station
number of the user and the selected PEN. In every transit node, which
was reached via CorNet-NQ, this message contains the incoming seized
PEN, and the PEN or station number used to reach the outgoing seized
trunk.
- All messages have a code which identifies them as being generated
by CTLS.
- The user's station number is not the administrated station number
of the used terminal, if the user has identified himself on this terminal
using PIN network wide.
- The authorization assignment for CTLS using DMS/CM-Win is prevented.
- CTLS is provided for use on digital terminals. This includes also
the AC.
- CTLS is also possible on Anate, provided it can handle DTMF or an
external DTMF transmitter is used. i.e. a hand held tone sender.
- Functional terminals (e.g. set600), DSS1 termnals and CMI terminals
are excluded.
- An authorized user can activate this authorization by network-wide
identification on other terminals. Transmission of the CTLS authorization
using PIN network-wide via CorNet-NQ is supported.
- CTLS is used to seize trunks avoiding LCR. This means
- CDR is not possible,
- the blocking of destination numbers is circumvented and
- ITR and Closed User Groups are ignored.
- After outgoing seizure of a trunk using CTLS the station number transmission
is prevented by default. Transmission is only possible, if the newly
introduced COT parameter 'CTLS' is set in the corresponding
trunk group. This also applies for CorNet-NQ circuits, as a breakout
to CO via PBXXX and DPNSS is possible here.
- A "normal" dialing-in via trunk or tie lines and subsequent use of
CTLS as DISA feature is prevented.
- An entered station number is only transmitted after the entry of
a # (en-bloc dialing). If the selected PEN has previously seized a cutdial
circuit, a correct connection establishment cannot be guaranteed.