TC12 Installation, Commissioning & Maintenance Handbook
666/HE/43100/000
Page 145
Issue 10
4.4
OVERVIEW OF TEST SET SOFTWARE SETTINGS/SELECTIONS AND
OPERATION
4.4.1 Modes of Operation
4.4.1.1 Monitor Mode
Monitor mode allows control and reply messages to be monitored at either the
Instation or at an OTU.
When the ITS is operating in this mode, the operation of any key (except the mode
selection key) has no effect on the data being transmitted between the Instation
and the OTU.
Connecting the ITS (in this mode) to the OTU or ITU does not cause an error in
the data being transmitted between the Instation and the OTU for more than one
second.
4.4.1.2 Instation Mode
In this mode the ITS replaces the computer and the Instation equipment. The ITS
transmits at one second intervals to a selected OTU, a control message in
accordance with the control data setup and displayed on the PC
4.4.1.3 Outstation Mode
In this mode the ITS replaces a selected OTU. The ITS displays any two
characters of the control message being transmitted by the computer. In response
to the control message the ITS transmits a reply message containing the data
setup on the display.
4.4.2 Screens / Functions of the ITS
4.4.2.1 Manager
Under this menu option, the user can choose to recall or save the data entered for
the current line configuration i.e. number of OTUs on the line, number of control
and reply bytes for each OTU, optional OTU identifier strings for each OTU, baud
rate, 2 or 4 wire and full or half duplex.
4.4.2.2 System Setup
Under this menu option the user can select screens to enter various items of data
concerning the system and test set up.
4.4.2.2.1 ITS Modes
This allows the setting up of the mode of operation for the ITS.