OPTICOM OPERA CONTROL CENTER SERVER - V 3.5 User manual

This information may be subject to change. All brand and product names are trademarks and/or
registered trademarks of their respective owners. All rights reserved.
Copyright © 2002 by OPTICOM GmbH · www.opticom.de
User Manual
for the OPERA™ Control Center Server Software V3.5
OPR-003-CTR-X
OPR-010-CTR-X

CONTENTS
i
Contents
Contents.............................................................................................................................................i
1Preface......................................................................................................................................1
2The Concept Behind the OPERA™ Control Center..........................................................2
3Setting up the OPERA™ Control Center............................................................................3
3.1 Verifying the Test Setup...............................................................................................3
3.2 Defining the Resources – the Phone Book................................................................3
3.3 Defining the Testcalls – the Commands Table..........................................................5
3.4 Using Microsoft Access to edit the Database..........................................................6
4Starting and Stopping the Measurement............................................................................7
5The Result View......................................................................................................................8
5.1 The Result File................................................................................................................8
5.2 Freezing Fields................................................................................................................8
5.3 Selecting the Columns to Display...............................................................................9
5.4 Filtering the Results.......................................................................................................9
5.5 Alerts .............................................................................................................................11
5.6 Clearing the Result File ...............................................................................................11
5.7 The Averages Functionality......................................................................................11
5.8 Meaning of the Results...............................................................................................11
5.9 Archiving of the Result Files .....................................................................................13
5.10 Viewing Statistics.........................................................................................................14
5.11 Printing Results............................................................................................................15
5.12 If No Data is Shown Even if the Result File Exists..................................................15
6Summary of the Menu and Toolbar Options....................................................................16
7Other Issues ..........................................................................................................................17
7.1 Modifying the Evaluation of the Results.................................................................19
7.2 A Note to Users of Versions older than V3.5..........................................................19
7.3 Full and Light Version of the OPERA™ Control Center Software ......................19

PREFACE
1
1Preface
This document is meant as a completion to the user manual of the OPERA™
measurement system. It describes the OPERA™ Control Center Server
Software (OPR-003-CTR-X, OPR-010-CTR-X). Before you start reading this
documentation, you should already be familiar with the OPERA™ system in
general.
The purpose of the OPERA™ Control Center is to schedule test calls and the
evaluation of speech quality parameters between various OPERA™ systems
and to remote control these systems through a TCP/IP connection. It allows
the user to create complex schedules consisting of up to some hundred
commands without having to think about the synchronization and allocation
of the resources. Commands may be automatically repeated and
rescheduled after a certain time, e.g. every Monday.
Although the OPERA™ Control Center was originally designed for the
automated monitoring of telecom networks with OPERA™ systems standing
at all important network nodes, it can be used on a single OPERA™ system
as well. Please note, that with the "Light" version of the OPERA™ Control
Center, the software cannot be used to manage a distributed set of OPERA™
systems. If you want to use the OPERA™ Control Center to control other
systems than the local host, you will need the full version. For more
information about this, please refer to Section 8.3 in this manual.
The use of the OPERA™ Control Center is not limited to telecom
applications, it is also applicable to wide band audio applications.
All interface options and all algorithms available for OPERA™ may be used
in conjunction with the OPERA™ Control Center. Typical applications range
from monitoring telecom networks up to automatically test broadcast
transmission links. The OPERA™ Control Center may also be used for
automating tests in an R&D environment if you do not want to write
commandline scripts, although we would generally recommend the
commandline interface for this purpose since it is significantly more flexible
and gives more detailed results. In any case, all results will be stored in a tab
separated text file which can be viewed by the OPERA™ Control Center
itself, or imported into any spread sheet data base program or network
management system for further analysis.

THE CONCEPT BEHIND THE OPERA™CONTROL CENTER
2
2The Concept Behind the OPERA™ Control
Center
The OPERA™ Control Center consists of two modules which access the
remote controlled OPERA™ systems through remote procedure calls. The
first module is the graphical user interface (GUI), which is used to create
and edit entries in the command database. From the command database
the system creates some control files which are handed over to the
dispatcher module. The dispatcher module does the real work and takes
care of the allocation of all required resources before a test call is issued. It
locks the interfaces which are required for a test call and keeps them locked
throughout the test call. This will effectively block all other commands and
also manual access (e.g. the use of OptiCall™) to theses resources.
Commands which require such a locked resource will be delayed until the
resources are free again. Due to this locking mechanism there may be
several OPERA™ Control Centers and OptiCall™ applications active on the
network.
In order to keep the maintenance of the system easy, there are two different
tables used to form the command database. One contains the description of
the available resources on the network ("Phonebook", see Section 3.2) and
another one consists of the actual test commands ("Commands", see Section
3.3). The first table is used to assign an alias name for each combination of
an OPERA™ system, the chosen interface and the associated telephone
number. The second table then uses these alias names to define the
originator and the terminator of the test calls. This means if the name of a
system or just the telephone number changes, it is not required to adapt the
entire command schedule (the relevant interface may be used a hundred
times there), instead just the single database entry which defines the alias
name of the relevant interface has to be modified.

SETTING UP THE OPERA™ CONTROL CENTER
3
3Setting up the OPERA™ Control Center
3.1 Verifying the Test Setup
Before starting to use the OPERA™ Control Center, all systems should be
booted and - if they are not members of the same Windows NT domain -
logged on with the same user name and password. If you did not modify any
settings on the OPERA™ systems, they will all automatically log you on after
booting them.
It is generally a good idea to verify the correct setup by issuing a few test
calls manually using OptiCall™ from the machine on which the OPERA™
Control Center is installed. If it is not possible to establish a call using
OptiCall™, it will also not be possible to do so using the OPERA™ Control
Center. If there are problems at this stage already, please verify your network
settings and the proper connection to the telephone network. If the call
succeeds if it is issued from OptiCall™ running on the OPERA™ system
where the interfaces are installed, the reason is probably due to the network
setup. Please consult your local network administrator or OPTICOM in this
case. Especially if you are using a firewall between two OPERA™ systems,
some special network settings may be required.
If everything works fine so far, you may start the OPERA™ Control Center. It
will come up either with an empty result table (if you did not yet perform
any measurements) or with the result view of the last measurements that
have been performed.
If you haven't performed any test calls with the Control Center yet, you will
create database entries for all resources you want to use, in a first step (see
Section 3.2). The second step is to create a table with the actual commands,
as described in Section 3.3.
3.2 Defining the Resources – the Phone Book
To create the resources required for the commands, simply click on the
toolbar button Phone Book. This will popup a dialog window with a table
as shown in Figure 3.1. You may edit existing entries in this table by simply
clicking on the fields you want to modify, you may add new rows or you
may delete existing rows.
The meaning of the columns of the Phone Book table are explained in Table
3.1. Imagine this resources database as a telephone book. Everybody has a
name in there (=ResourceName), an address (SystemName, LineInterface)
and a telephone number (PhoneNumber) under which you can call the
person. Each resource may appear in table several times with different
resource names, just like one person may have several telephone numbers.
You may also use the same interface with different names and telephone
numbers, if you want to perform e.g. several loop calls on the same
interfaces, taking different routes through the network which are defined by
the telephone number.
You edit existing entries in the table by simply clicking on them with the
mouse. If you want to create a new entry click on the "Add" button and then
select the field of the new line that you would like to edit. If you are done

SETTING UP THE OPERA™ CONTROL CENTER
4
with editing the table click on the "Close" button to close the window. The
underlying database is then updated accordingly. To delete an entry in the
table, select a line and then click on the "Delete" button. You may also
select several lines to delete.
For editing new entries you may also copy and paste a single field or a
whole line in the table. To copy a single field entry, you either select the
copy command from the pop-up menu that appears on a right click after you
selected the entry, or you use the key combination Ctrl-C to copy and then
Ctrl-V to paste.
To copy a whole line or several lines, you will first select the line (or the
lines) by clicking on the gray field on the left hand side of the
"ResourceName" column. Then copy the selection with the key combination
Ctrl-C. When you paste it using Ctrl-V, the selection will be automatically
added to the end of the table. In doing so, an additional index will be
appended to the resource names that have been pasted, automatically.
Please note, that only those resource names may be deleted or modified,
which are not currently used in the Commands table.
Figure 3.1: The Phone Book dialog window.
Column Title Description
ResourceName Name under which you want to address this resource in the
command table
SystemName Computer name of the OPERA™ analyzer where the interface is
located. May also be "localhost" for the local machine.
LineInterface Index of the interface on the OPERA™ analyzer defined in
SystemName. This index is shown in OptiCall™ if you click on the
drop down list box for the interface selection. It is the sequential
number before the name of the interface.
PhoneNumber This is the phone number which must be dialed in order to call this
resource.
Comment This is an optional comment which will appear in the result table.
Table 3.1: Meaning of the columns of the Phone Book table.

SETTING UP THE OPERA™ CONTROL CENTER
5
Note:
If you are using the light version of the OPERA™ Control
Center, "localhost" is the only valid entry for the resource
name (see Section 8.3).
Figure 3.2: The Commands Table dialog window.
3.3 Defining the Testcalls – the Commands Table
After creating a Phone Book table with the available resources, you are
ready to create a table with the schedule of the test calls. Just click on the
toolbar button Commands. Figure 3.2depicts the dialog window that will
be presented. Editing this Commands table works essentially in the same
way as editing the Phone Book table.
The meaning of the columns is explained in Table 3.2. The fields for the
originator and the terminator of the call ("Origin" and "Termination") are
drop down list boxes which are automatically filled with the resource names
defined in the Phonebook. The "Reschedule" field is a drop down list box as
well, here you will find entries as e.g. "Every Monday" or "Immediately".
When you click on a "Filename" field in the table, a small button will appear
on the right edge of the field. Use this button to browse for files on your
computer.
As described for the phone book table, you may copy and paste a single
field or a whole line in the table. To copy a single field entry, you either
select the copy command from the pop-up menu that appears on a right
click after you selected the entry, or you use the key combination Ctrl-C to
copy and then Ctrl-V to paste.
To copy a whole line or several lines, you will first select the line (or the
lines) by clicking on the gray field on the left hand side of the "Enable"
column. Then copy the selection with the key combination Ctrl-C. To paste
it into the table, use the combination Ctrl-V.

SETTING UP THE OPERA™ CONTROL CENTER
6
Column Title Description
Enable Check the box in order to activate the command. Inactive commands
will not be executed during the measurement.
Comment This is an optional comment which will appear in the result table.
Origin Select the interface on which you want to originate the call (Drop
down list box).
Termination Select the interface on which you want to terminate the call (Drop
down list box).
Filename Name of the wave file with the speech sample which is sent from the
terminating side to the originating side.
StartTime This is the time in UTC at which the command will be executed for
the first time. If it is a date in the past, the system will reschedule the
command as defined by the reschedule parameter.
EndTime This is the time in UTC at which the command will be terminated.
Repetitions Defines how often a command will be repeated before it is
rescheduled.
Delay This is an optional delay between two command repetitions. It is
defined in seconds.
Reschedule Here you may choose when the command will be issued again (Drop
down list box).
Table 3.2: Meaning of the columns of the Commands table.
Note:
Please note that all times are specified in UTC (Universal
Time Coordinated) in order to use the same time
coordinate on measurement systems standing in different
time zones. During winter time (standard time) UTC is
equal GMT (Greenwich Mean Time). During summertime
(daylight savings time), UTC is GMT –1. To obtain your
local time, you need to subtract (add) a certain number of
hours from (to) UTC depending on how many time zones
you are away from Greenwich (England). For the current
GMT check the following web site:
www.GreenwichMeanTime.com/
3.4 Using Microsoft Access to edit the Database
If you are planning to create a large and complicated setup, it may be a good
idea to use MS Access to edit the tables, especially the Phone Book table.
The Commands, as well as the Phone Book table are stored in the file
c:\programme\opera\databases\commandlist.mdb. You may directly open
this database using MS Access, or any other compatible database
application.

STARTING AND STOPPING THE MEASUREMENT
7
4Starting and Stopping the Measurement
When you have successfully setup your databases, you start the
measurement by clicking on the toolbar button Start. A dialog window will
pop up asking you whether you want to append new measurements to the
existing result file or if you want to create a new result file. Then, you will
be informed in the status bar, on the bottom of the main window, about the
number of currently active and waiting commands.
The result display is permanently refreshed. If you want to stop this
automatic refresh, click on the toolbar button Pause Refresh and to switch
it on again on Continue Refresh. If you want to refresh the display manually
click on Refresh. Figure 4.1depicts a typical view of the Control Center
main dialog window after a measurement has run for a while.
Figure 4.1: The OPERA™ Control Center main dialog window.
In order to stop the measurement, wait until no more commands are
scheduled or press on Stop. Pressing Stop may take some time since all
scheduled commands, active as well as sleeping commands, must be
interrupted which is not possible at all times. Sometimes the OPERA™
Control Center has to wait until a command reaches an interruptible state.
When all commands are stopped, this will be indicated in the status bar of
the main window by the status message "Inactive".
During the measurement all results are written to the file which is indicated
in the title bar of the main dialog window of the OPERA™ Control Center.
Further information about the result file and the result view in the main
dialog you will find in the next section.

THE RESULT VIEW
8
5The Result View
The result view is the table which is drawn in the main dialog window of
the OPERA™ Control Center (see Figure 4.1). It presents the contents of the
result file which was created during the measurement. You may drag the
columns with the mouse in order to change their sequence, and you may
modify the sort order by clicking into the heading of any column.
Please note that between column 6 and 7 there is border which splits the
table into two parts. Since the first six rows are used for grouping the rows,
you are not allowed to drag a column from the left part of the table to the
right part and vice versa.
5.1 The Result File
During the measurement, the results are written in the file that is shown in
the title bar of the main dialog window. As a default, the results are stored in
c:\programme\opera\databases\results.txt. This is the file which is opened
every time when you start the OPERA™ Control Center.
If you want to open another result file, choose the menu option File|Open.
To create a new result file, select the menu option File|New. You may, as
well, save the current results in another file, therefore select the menu option
File|Save as. The chosen file will immediately be opened in the result view
of the OPERA™ Control Center.
5.2 Freezing Fields
It is also possible to freeze rows and columns by pulling the border line
between the row with the column titles and the results values down with
the mouse, or pulling the left most border line of the table to the right.
Therefore move the mouse near to the corresponding line until the mouse
symbol turns into a little lock symbol. Then you may freeze rows or columns
by holding the left mouse button down and move the mouse until all the
rows or columns that you wish to freeze are selected.
The freezed fields will be depicted olive-colored. For instance, if you have
freezed the first two columns, as shown in Figure 5.1, these columns will
not move while you scroll to the right in the result view.
If you want to "unfreeze" fields, you should move the mouse near to a line
between a freezed and a non-freezed area of the result table. The mouse
symbol will turn into the lock symbol again, and you will be able to select a
new freeze area.

THE RESULT VIEW
9
Figure 5.1: The main dialog window with the first two columns in freezed mode.
5.3 Selecting the Columns to Display
Maybe the result view of the Control Center will provide you with more
information as you actually require. If you do not want to see all this
information, you may select which columns are shown and which ones are
hidden. Just click on the toolbar button "Select Columns" and check the
appropriate boxes in the dialog that pops up (see Figure 5.2).
Figure 5.2: The Select Columns dialog window.
5.4 Filtering the Results
If you want to filter the results which are shown in the table, there is the
option to generate some filtering rules. Two filter types are available: the
Connection Filter type and the Limit Filter type.

THE RESULT VIEW
10
Limit Filters will filter out all results where one or several parameters are
exceeding a user definable limit. Connection filters will allow you to filter
the results depending on which resources have been involved to originate
and terminate the call. For both filter types you may combine several simple
filters using Boolean AND/OR operators in order to form complex filters.
If you want to specify a Connection Filter, use the dialog that appears after
clicking on the menu Filters|Edit Connection Filter. The Connection Filter
dialog is shown in Figure 5.3. For each Condition and Resource Name
option there are drop down fields available. When you confirm your filter
selection with the OK button, the filter condition is immediately applies on
the result view. To switch this filter on and off use the menu Filters|Apply
Connection Filter.
Figure 5.3: The Connection Filter dialog window.
In order to specify a Limit Filter use the dialog that appears after clicking on
the menu Filters|Edit Limit Filter. This dialog allows you to select the
parameters which shall be filtered by drop down list boxes and to specify
the limits by editing a regular edit field. Figure 5.4shows an example where
a threshold for the PESQ MOS value has been defined. After confirming this
filter setting by clicking on the OK button, the result view will show only
those measurements that fulfill the chosen condition. To switch this filter on
and off use the menu Filters|Apply Limit Filter.
Figure 5.4: The Limit Filter dialog window.

THE RESULT VIEW
11
5.5 Alerts
When measuring a system under test with the Control Center, you may
notify a person in case of a specific problem. Therefore you select the menu
option Filters|Alerts. As shown in Figure 5.5, you will in a first step define a
condition for the alert. This is done in the "Limit Definition" section. In a
second step you will define what action should be executed if the condition
defined is fulfilled during the measurement. Check the button titled "Execute
program on alert", and enter a program that is to be executed. This may be a
batch file, or , as shown in the example setup in Figure 5.5, the Windows
network command "net send" to send a message via an IP network.
Figure 5.5: The Alerts dialog window.
5.6 Clearing the Result File
If you want to delete all the results before starting a new series of
measurements, select the menu View|Clear... and confirm the warning
which pops up with a click on yes. If you want to archive the results you
should copy the result file to a safe location before. The default location for
the result file is c:\programme\opera\databases\results.txt. As mentioned
in Section 5.1, you may choose a different location on your computer where
you want to store the result file.
5.7 The Averages Functionality
As a default, the Averages functionality is switched on in the Control Center.
If this option is activated, the results are divided into groups. The groups are
defined according to the very first column in the result view. Within these
groups, all result values are averaged and the average values are shown in
yellow-colored lines above every group.
If you prefer a simpler view of the results, switch off the average of the result
values. Just use the menu "View"|"Show Averages" to toggle between the
two modes.
5.8 Meaning of the Results
Table 5.1gives an overview of the results which are shown in the result
view of the OPERA™ Control Center. Depending on your current licenses
and system configuration not all of these parameters may be available on

THE RESULT VIEW
12
your system, e.g. if you have not purchased PESQ, the PESQ result values
will not be available in the result view, as a consequence. Most measured
parameters correspond to values determined by OPERA™. Please refer to the
OPERA™ manual for a detailed description.
Column Title Description
Comment The comment which is related to the command.
CommentO The comment which is related to the originating resource.
CommentT The comment which is related to the terminating resource.
Origin The resource name of the interface which originated the call.
Termination The resource name of the interface which terminated the call.
Index A sequential index of the test measurements
Time Time in UTC at which the command was started.
RepCount Counts the repetitions of the command
MaxRep Corresponds to "Repetitions" in the command definition
CallingSys Name of the system that originated the call.
Calling Line Index of the line interface used to originate the call
CalledNumber Telephone number dialed
CalledSys Name of the system that terminated the call.
Called Line Index of the line interface used to terminate the call
RefFile The name of the file which was sent from the terminating side to the
originating side
FileCaller The name of the file which was recorded at the originating side
(degraded signal)
FileCalled The name of the file which was recorded at the terminating side
(echo signal)
Tpdd Post dial delay in ms, including the time required to detect the ring-
back tone (app. 2..3s, country specific)
Tring Currently not used, please ignore.
Duration Total duration of the call (including dialing etc.)
TermCause Termination cause. If it is "connect", the call was successful, all
other values (busy, disconnected...) identify missed call attempts.
PsqmOMOS_W2 The MOS according to PSQM / P.861 using a silence weight of 0.2.
PsqmPlusOMOS The MOS according to PSQM+.
PsqmDelay The delay in ms as determined by OPERA™ during calculation of
PSQM.
Attenuation The attenuation of the line in dB.
EchoDelay The delay of the severest echo component in ms.
ERL The echo return loss of the severest echo component in dB,
measured with real speech.
PesqMOS The MOS according to PESQ / P.862
PesqMOSsp PESQ / P.862 MOS of the speech parts of the test signal
PesqMOSbg PESQ / P.862 MOS of the background noise parts of the test signal
DelayMin The minimum delay in ms during the call as determined by PESQ /
P.862
DelayAvg The average delay in ms during the call as determined by PESQ /
P.862
DelayMax The maximum delay in ms during the call as determined by PESQ /
P.862
LoudnessRefSone Loudness of the reference signal measured in Sone
LoudnessDegSone Loudness of the degraded signal measured in Sone
LoudnessBackSone Loudness of the background noise parts of the degraded signal
measured in Sone
LevRefTotdBov Level in dBov averaged over the total of the reference signal
LevRefSpdBov Level in dBov of the speech parts of the reference signal

THE RESULT VIEW
13
LevRefBackdBov Level in dBov of the background noise parts of the reference signal
LevDegTotdBov Level in dBov averaged over the total of the degraded signal
LevDegSpdBov Level in dBov of the speech parts of the degraded signal
LevDegBackdBov Level in dBov of the background noise parts of the degraded signal
PesqAttenuation Attenuation of the test signal as measured by PESQ / P.862
Table 5.1: The meaning of the columns of the Result View
Column Title Description (Continued)
FECmin Minimum amount of Front-end clipping (FEC)
FECavg Average of Front-end clipping (FEC)
FECmax Maximum amount of Front-end clipping (FEC)
HOTmin Minimum amount of Hold-over time (HOT)
HOTavg Average of Hold-over time (HOT)
HOTmax Maximum amount of Hold-over time (HOT)
Errors Errors messages in case of problems
Table 5.2: Continuation of the meaning of the columns of the Result View
5.9 Archiving of the Result Files
During the execution of test measurements with the Control Center, the
result file may increase to a size that is not manageable in a comfortable way
anymore. If you want to separate your results into a number of smaller files,
select the menu option Extra|Options... The Control Center will offer you
the option to define an archive location on your computer where the result
files will be stored during the execution of the test measurements. As shown
in Figure 5.6, you will define an archiving interval. If you want to switch off
the archiving functionality, enter the value zero into this edit box.
The archived result files are stored in the directory that is defined in the edit
field on the top of the dialog ("Move results to:"). If you want to use unique
file names for the archiving, check the switch located underneath the edit
box for the archiving interval. If you choose not to use unique file names, the
archived result file will remain the file name shown in the title bar of the
main window and will be overwritten in each archiving process.
As a default, the test WAVE files that are acquired during the execution are
stored in the directory d:\remote. When you do not wan to store these files
on your computer, check the switch titled Delete wave files after
evaluation, which will prevent that your hard disk will run out of free
memory during the execution of a large number of test measurements.

THE RESULT VIEW
14
Figure 5.6: The Options dialog window for archiving result files.
5.10 Viewing Statistics
In order to view some statistics of certain result values shown in the result
view, first select a result value by clicking somewhere into the
corresponding column. Then, by a right mouse click, select the option Show
Chart, a dialog window as shown in Figure 5.7will pop up.
Figure 5.7: The PDF chart dialog window
The diagram shown in the top of the dialog is the probability density
function (PDF) of the result parameter you have selected. The horizontal axis
represents the measurement values, the vertical axis represents the
probability. The second diagram presents the measurement result values
versus time. Here, the horizontal axis represents the index in the table of the
result file. The vertical axis represents the values of the result parameter.
If you want to change the number of bars shown in the PDF diagram to have
a different resolution, you can either select a value from the drop down list
of the edit field titled Select number of bars. or you enter a certain value
into the edit box. Please note, that your changes only take effect after you
have pushed the Refresh Chart button located on the bottom of the dialog
window.
If you want to change the value range of the horizontal axis of the PDF
diagram, modify the setting in the two edit boxes located underneath the title

THE RESULT VIEW
15
Select value range. When you click the Reset Selection button, the edit
boxes will be set back to their default settings. As explained above, the
selected value range will only take effect after you click on the Refresh
Chart button.
5.11 Printing Results
In order to print the result view, select the menu option File|Print. Please
setup the page layout from the windows menu Start|Settings|Printers.
5.12 If No Data is Shown Even if the Result File Exists...
It is rare, but it may happen that your result file contains field names
different from those expected by the OPERA™ Control Center (e.g. if you
started it with a corrupt result file). In this case the OPERA™ Control center
will not show any useful data. However it is easy to cope with this: select
View|Reset Field Names from the menu. This will synchronize the field
names used by the Control Center with those in the result file. If this does
not help, try to clear the result file as described before and then repeat this
step and restart the measurement. After the first new results are available,
the new field names will be read from the result file.

SUMMARY OF THE MENU AND TOOLBAR OPTIONS
16
6Summary of the Menu and Toolbar Options
An overview of all the menu option of the Control Center is listed in Table
6.1. The functionality toolbar buttons is summarized in Table 6.2. For further
details, you will find references to the sections in this documentation.
Menu Option Description
File|New... Creates and opens a new result file (see Section5.1)
File|Open... Opens an existing result file (see Section5.1)
File|Save as... Save current result file to hard disk (see Section5.1)
File|Page Layout... To setup the page layout for printing, please use the
windows option Start|Settings|Printers
File|Print... Prints current result view (see Section5.11)
File|Exit Exits the OPERA™ Control Center
Filters|Apply Connection Filter Applies the connection filter to the result view (see
Section 5.4)
Filters|Apply Limit Filter Applies the limit filter to the result view (see Section
5.4)
Filters|edit Connection Filter... Opens a dialog to edit the connection filter (see
Section 5.4)
Filters|Edit Limit Filter... Opens a dialog to edit the limit filter (see Section5.4)
Filters|Alerts... Opens a dialog to define a alert functionality (see
Section 5.5)
View|Toolbar Switches on/off the toolbar
View|Statusbar Switches on/off the statusbar
View|Show Averages Switches on/off the averages functionality
View|Refresh Refreshes the result view (see Section4)
View|Reset Field Names Synchronizes the field names of the current result file
with the result view of the Control Center (see Section
5.12)
View|Clear... Clears the current result view and deletes the
corresponding result file (see Section5.6)
Extra|Options... Opens a dialog to specify the archiving functionality
(see Section 5.9)
Table 6.1: Overview of the menu option of the OPERA™ Control Center.
Toolbar Button Description
Start Starts the execution of the commands (see Section4)
Stop Stops the execution of the commands (see Section4)
Commands Opens the dialog for defining the commands (see Section3.3)
Phone Book Opens a dialog to define the resources (see Section3.2)
Continue Refresh Continues with refreshing the result view (see Section4)
Pause Refresh Pauses the refreshing of the result view (see Section4)
Refresh Refreshes the result view once (see Section4)
Select Columns Opens a dialog to specify which result parameters are shown the
result view (see Section5.3)
Table 6.2: Overview of the toolbar buttons options of the OPERA™ Control Center.

OTHER ISSUES OF THE CONTROL CENTER
17
7Time Synchronization of Distributed OPERA™
Systems
7.1 Description
Users that have purchased a OPERA™ Control Center license (OPR-003-
CTR-X or OPR-010-CTR-X) will receive a program called Time
Synchronization (TS). TS is a small add-on that is used to synchronize the
local time and date (on local machine) with another computer on local
network. It works with almost clockwork precision, the precision is in tens
of nanoseconds. This program should be used when performing test calls
with distributed OPERA™ systems.
7.2 Installation & Using
The TS program has to be installed on the computer that shall be
synchronized with another computer as a time reference. TS does not need
to be installed on the reference computer. The TS program has already been
installed if an OPERA™ Control Center license has been included in the
order of an OPERA™ system.
To install the time synchronization program you have to right-click on the
TimeSync.inf file and choose the command install. This script will install the
Time Synchronization service and the control panel applet. A dialog
window as shown in Figure 7.1will be displayed.
Figure 7.1: The settings dialog window of the Time Synchronization program.
First a reference computer has to be set. This is done in the “Network” field
of the “Settings & Sate” tab of the dialog window. You can use the Browse
button to select a reference computer. If no reference is chosen, the
reference computer is the local machine. The option titled “Take care of time
zones” must be checked.
In a second step, the time interval has to be set. For best operation the
smallest value available has to be selected, i.e. 5 minutes. Please note, if the

OTHER ISSUES OF THE CONTROL CENTER
18
slider is put to its left-most position the synchronization will be turned off.
The arrow keys of the keyboard can also be used to set the time interval.
Before using the keyboard, you have to select the slider control.
After all necessary settings have been done, the synchronization service is
installed by clicking on the OK button. A message window will appear
asking whether the service shall be executed. After confirming with the
“Yes” button, the Time Synchronization service will run. After the Time
Synchronization service has been installed and started, the computer time
will be synchronized within the time interval defined in the settings dialog.
If the TS program has already been installed on the computer, the TS
program is executed by right-clicking on the TimeSync.inf file and choosing
the install command, just like mentioned above. The synchronization will
proceed after clicking on the “Synchronize now” button located in the “Last
time correction” field and then clicking on the OK button.
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