WWG IBT-20 - Amazon Web Services

For testing Primary
Rate Accesses:
• Tests all the interfaces
of an ISDN Primary
Rate Access
• Full and fast
of ISDN accesses
using automatic
testing functions
• Fully configurable so
that only wanted tests
are carried out
• Long battery autonomy
allows the tester/
analyzer to be used all
day in the field
• Installation and commissioning of
ISDN Primary Rate Accesses
• Maintenance of ISDN PRA
• Installation, maintenance of PBXs
• Installation and maintenance of PBX
private networks
• Monitoring and optimization of ISDN
During installation of primary rate
accesses, a number of tests have to be
carried out to check access to the ISDN
network, the availability of basic services and
subsequent transmission quality.
When commissioning primary rate
accesses, operators and end users need a
quick, easy means of defining the X.25
service or supplementary services provided.
When installing a PBX, the basic services
must be tested to check that the PBX was
configured correctly prior to connection to
the network.
Maintaining ISDN equipment or primary
rate accesses requires an analyzer that can
perform detailed decoding of the D channel
protocol in high-impedance mode. It is
useful to perform exhaustive decoding and
archive the test results, thus keeping track of
detected problems.
For private PBX networks, it is also
essential to test the private links used for
interconnection in addition to the needs
listed above.
• Terminal and Network simulation
• Test of services and BER test (G.821)
• Automatic and functional test of all
ETSI supplementary services
• ISDN multiple calls
• Test of X.25 in the D and B channels
• Master and Slave simulations on
private PBX networks
• Integrated protocol analysis function
• Real-time protocol analysis on PC
• V5.1/V5.2 protocol analysis
• PC-based expert system to help with
troubleshooting and proactive
The basic version incorporates all the
essential tests, such as BERT (bit error rate
tests), test of services and of all ETSI
supplementary services in automatic or
functional mode. It also offers X.25 in the
B and D-channels testing (as per ITU-T X.31)
and an integrated tracer mode.
There are easily downloaded software
options that:
• provide extremely powerful protocol
analysis in high-impedance mode, with the
option of detailed analysis on a PC, either
in real time or at a later date,
• support the private protocols used in PBX
• provide an expert system for ISDN.
• Updates by software
TE (Terminal) Simulation mode
This mode is used to replace a terminal and then to make up to
30 calls simultaneously, measure the bit error rate (BER) and test
the services and supplementary services. The B channel
availability and Multiple Calls tests quickly determine the access
configuration. The WWG IBT-20 generates DTMF (touch tones
0 to 9, * and #) and allows access to Keypad facilities, either
while a call is established or during the call.
NT (Network) Simulation mode
The NT simulation is used to simulate an ISDN network at the
T2 interface prior to connecting the terminal to the network.
This operating mode enables the user to use the tests and
functions available in TE mode (call, automatic testing of
services and teleservices, BER test, loopbox, etc.).
Terminal Simulation mode (TE)
Bit error rate test (G.821)
The WWG IBT-20 tests the quality of transmission at an ISDN
access in self-call mode or through end-to-end measurements.
Bit errors can be inserted manually or automatically and the
level of quality displayed at any time during the test.
BERT mode
Loopbox mode
Test of services and teleservices
The WWG IBT-20 tests the availability of the various services
offered with ISDN: Bearer Capability, services and teleservices.
A special mode allows the services associated with the protocol
used to be tested automatically.
Test of services
Test of supplementary services
The WWG IBT-20 very simply allows users to perform a functional
or automatic test to check for the presence of all the
supplementary services on the access being tested. In automatic
mode, the WWG IBT-20 results indicate availability,
non-availability or the causes of error for each of the tested
supplementary services.
See Pocket Guide No. 1, "ISDN Supplementary Services".
Extracting the B channel to the V.11 interface
Speech BC
Audio 3,1 kHz
Data 64 BC
Data 56 BC
Fax G3
Fax G4
AutoTrack function
The WWG IBT-20 takes user-defined criteria and automatically
extracts a B channel to a V.11 interface for analysis by the
WWG DA-5. This function works with voice or data calls and is
very useful in datacoms, Internet and telecoms applications.
See Pocket Guide No. 2, "ISDN PPP Troubleshooting".
Self-call mode
End-to-end measurement
Network Simulation mode (NT)
Test of supplementary services
Test of X.25 in the D and B channels
The WWG IBT-20 tests the accessibility and performance of the
X.25 service in the B and D channels (as per X.31, case A and B).
Real-time protocol analysis on PC
For particularly tricky maintenance problems, the WWG IBT-20
can be combined with the Windows™-based analysis software.
This greatly increases the available diagnostic options by
performing exhaustive decoding of the D channel protocol.
The data can also be stored on a PC in real time, allowing more
in-depth analysis to be performed, which is particularly
important when investigating random problems.
PC-based real-time analysis of the D channel
V5.1 and V5.2 protocol analysis (option)
The WWG IBT-20 can analyze V5.1/V5.2 protocols either in real
time or at a later date. The WindowsTM PC Detailed Decoder
software, which is available as an option for V5.1/V5.2 analysis,
is used to save capture files to the PC's hard disk or to perform
long-term analysis in real time. Powerful filters ensure that errors
at the access are detected quickly and easily.
Expert System: WWG ISDNpartner
The first generation of ISDN testers (which were designed for
installing ISDN accesses) only provided basic simulation
functions, which meant that the access had to be checked by an
engineer. The second generation (designed for maintenance
purposes) also integrated protocol analysis functions, again
intended for use by specialists.
Now WWG ISDNpartner can be combined with the WWG IBT-20
(any configuration) to create a third generation of testers,
offering all users access to sophisticated troubleshooting and
network monitoring functions.
Integrated protocol analysis function
The WWG IBT-20 can be used to analyze the signaling on the
D channel in high-impedance mode, making it an essential tool
for maintenance purposes. The plain-text displays and filter
functions greatly speed up the diagnosis.
Private protocols
The WWG IBT-20 supports the CorNet-N®, CorNet-NQ®
(registered trademarks of Siemens AG Munich/Berlin) and Q.SIG
private protocols, and can thus be connected to private PBX
networks in place of a PBX. This operating mode enables the
user to use the tests and functions available in TE mode (call,
automatic testing of services and teleservices, BER test,
loopbox, etc.) and the special features of this type of network:
clock synchronization function and Master/Slave mode.
Today, ISDN systems appear to be rolled out ever faster, and
there is just not enough time for installation and maintenance
teams to be trained properly. Applications that use ISDN are
also becoming increasingly complex, which means that a
specialist almost inevitably has to be called out when a problem
is detected on a line.
The WWG ISDNpartner expert system is the ideal tool for
tackling this situation.
WWG ISDNpartner is an expert system that meets the needs of
everyone involved in ISDN network and equipment maintenance
- whatever their level of skill and experience. It also provides a
complete overview of the network, making it much easier to
prevent problems occurring in the first place (occurrence of
transmission errors or failed connections over time, etc.),
to optimize performance and control communications costs.
All the information is clearly written in language that can be
understood by non-specialists.
With WWG ISDNpartner, users of Wavetek Wandel Goltermann's
ISDN testers/analyzers (IBT, DA-5, DominoWAN ISDN, etc.)
can benefit today from the diagnostic techniques of tomorrow at a surprisingly low cost.
WWG ISDNpartner
Approach the problem from the right end!
Protocol Analysis for ISDN faults should only be used as a last
resort (in fewer than 20% of cases), and then only if the initial
usage checks identify that the problem is effectively located at
the protocol level. A lot of time can be wasted if this basic
principle is ignored and, worse still, the problem often remains
unsolved. Lack of understanding and practical experience often
causes non-experts to skip various steps and rush headlong into
using an analyzer, wrongly thinking that it will work miracles.
Wavetek Wandel Goltermann has created WWG ISDNpartner to
help such non-specialists. It is an expert system that guides the
user through the various troubleshooting phases, using exactly
the same methodology as the best human experts. By carrying
out analyses with WWG ISDNpartner, the user will gradually learn
the necessary methods and knowledge, eventually becoming an
expert in his or her own right, able to solve any type of problem
in the minimum time.
Step one: Describing the problem with 'Expert Interview'
Expert Interview prompts the user to describe the problem
by asking a series of questions in a language that can be
understood by non-specialists. During the interview,
WWG ISDNpartner suggests a number of checks to be carried
out to discover the true nature of the problem. This first step
may lead to a solution (i.e. suggested corrective action).
Otherwise it will trigger an expert analysis, which is the second
step of the process.
Configuring the Expert Analysis
Configuration of the analysis is made extremely simple by the
interactive and contextual dialog or 'Wizard'. This enables the
user to select the source of the analysis (analyzer or file), set
capture filters, if necessary, and specify information such as the
user's name or the address of the site, which will be needed if
the session is subsequently to be archived.
Configuration made
easy with 'Wizard'
Results Journal
Throughout the analysis, any events that are detected are
classified by severity level in a 'Results journal'. This means that
the user no longer has to wade through hundreds of frames all
the relevant information is now kept centrally.
Clicking on an event calls up an additional level of detail:
• Statistics on the connection or equipment relating to
that event,
• Dynamic expert help providing a complete diagnosis of the
origin of the problem and suggesting a list of
corrective actions,
• Decoding of the frames that caused the event.
Expert Interview in HTML page format
Expert Interview is also particularly useful as a decision-making
tool for the hot-line support teams of network operators,
equipment manufacturers or other service providers. It helps
them to carry out first-level remote diagnosis and to choose the
appropriate actions, e.g. whether to opt for remote
maintenance or send an engineer to work on site.
Step two: Expert Analysis
The Expert Analysis takes place at the end of the interview,
although it can also be started independently. During this
analysis, WWG ISDNpartner searches for the signature of the
major symptoms and reportable events inside the frames
captured in real time or stored in a file.
The problem database that WWG ISDNpartner uses to carry out
this investigation is the fruit of close collaboration with a
number of ISDN experts. From this database, the software can
diagnose most of the problems likely to occur in the field. This
means that the expertise is not simply limited to testing whether
the frame's content conforms to the standards.
Results journal for storing events centrally
Step three: Protocol Analysis
Given the complexity and diversity of ISDN, there are some
faults that cannot be detected automatically. As the final level of
support, WWG ISDNpartner performs exhaustive decoding of the
frames, enabling a user who is familiar with ISDN signaling to
solve even the most complex problems.
In such cases, WWG ISDNpartner has invaluable advantages over
traditional packages:
• Option of saving all the information in a database, making it
much easier for a more experienced colleague to
subsequently analyze the data,
• Sophisticated mechanism for navigating through the trace,
greatly increasing the effectiveness of expert users.
Sophisticated navigation through the trace
A connections log enables the frames relating to each call to be
examined with a single mouse click. The user can also sort or
filter these connections by a range of criteria, such as address,
service or supplementary service used, status, start time, cost
and duration, etc. This correlation between connection and
trace, combined with the automatic filtering and sorting options,
saves precious time, particularly with long traces or when
analyzing on an ISDN primary rate access subject to
heavy traffic.
Complete overview
of the network
Flexible and future-proof software
Navigating through the trace using the connections log
Network monitoring
Configuration of events and detection thresholds
WWG ISDNpartner enables the most demanding users to change
the parameters of detected events in order to:
• adapt the expert system's behavior to the characteristics of
the network (by tuning thresholds),
• place the emphasis on detecting specific faults (by modifying
the severity level of certain events),
• provide a wider range of diagnoses and suggested solutions,
• trigger specific actions when certain events occur by starting
an application, recording the event, stopping the analysis, etc.
From the many logs, statistics and graphs, WWG ISDNpartner is
able to provide an overall network picture. This is particularly
suitable for proactive maintenance, optimizing performance and
controlling telecommunications costs.
Proactive maintenance
Some problems can have disastrous consequences for a
company, even if their symptoms are not immediately perceived
by end-users. One typical example is the router that
continuously establishes connections or keeps connections
open permanently. WWG ISDNpartner is able to investigate such
symptoms automatically and on an on-going basis, effectively
preventing the faults from occurring in the first place.
The user can also program an application to be started when
certain critical events occur, such as an email system designed
to notify abnormal situations in real time.
Graphs showing the occurrence of transmission errors or failed
connections over time are another highly effective tool for
anticipating significant drops in service levels.
Optimizing performance
To optimize network performance, the user must be able to
monitor B-channel usage, setup and release delays and error
rates, etc. Summaries of all this information are available in both
text and graph formats.
Optimizing telecommunications costs
Optimizing telecommunications costs requires control over
connection times, durations and costs, destinations, etc.
With its logs and statistics and a whole range of events
dedicated to controlling connections, WWG ISDNpartner is
the ideal tool for any company that wishes to minimize
its telecommunications bills.
Programming events and thresholds
Enhancing the Interview
The user can edit the Interview HTML pages as required,
or add new dialogs in order to incorporate his own experience
and analysis methods.
Programming the user interface
The logs can also be customized (choice and order of the
various fields). This enables the user to design dashboards
to suit the task at hand, a process made much easier by the
predefined profiles: troubleshooting, performance
optimizing, etc.
Data library and dedicated website
WWG ISDNpartner's Web interface enables the user - without
exiting the software - to navigate through the technical
data library on the installation CD-ROM and on the
WWG ISDNpartner Internet site:
On the website, the user can send messages (wish-list of
features, new events) and download software updates free of
charge (apart from major new functionalities).
Technical Specifications
S/T (30B+D) Primary Rate Access
Electrical characteristics ....... to ITU-T Rec. I.431,
ETS 300, 011
Connectors .................... RJ-45 (ISO 10173) and
SUB-D (15-pin)
Mode .............high impedance, 120 W and 75 W
Protocols ........... EDSS-1, Q.931, VN3/VN4/VN6,
............1TR6, 1TR67, TPH 1856*, TN1R6, Q.SIG,
.............. EDSS-CH (SwissNet 3),CorNet-N/NQ ®
Registered trademark, Siemens AG Munich/Berlin
* TE Simulation mode only
Interface for extracting the D or B
channel ........................................................ V.11
Serial interface .................................... mini-DIN
Handset interface ...................................... RJ-9
Screen display .............. 8 lines x 21 characters
Keypad .................................................. 24 keys
Alarm (LOS, RAI, CRC, LOF, AIS, E bit,
etc) and error (code, bit) signaled by LEDs
PC upload / download
Telephone Function (TE and NT Simulation)
Selection.......... address, sub-address, channel,
........................ service, self-call, loop command
Storage capacity ............ 10 telephone numbers
Recall feature
Callback function
ISDN multiple calls
Generation of multiple calls ................... 30 calls
Automatic call acceptance .................... 30 calls
B-channel availability test
DTMF generation ............................. 0 to 9, *, #
Bit error rate test (BERT) in TE, NT
Simulation and high-impedance modes
(ITU-T Blue Book)
Test sequences for measuring the bit error rate
Pseudo-random bit sequences .......... 24-1, 26-1,
........... 29-1, 211-1, 215-1(inverted, non-inverted)
Programmable 16-bit word
Measurement time ............ 1 min, 5 min, 15 min,
............................ 1 hour, programmable, infinite
Measurement ......conforms to Rec. ITU-T O.152
G.821 evaluation ........... ES, SES, EFS, US, DM
Error insertion ........................................ manual,
................... automatic (10-6 , 10-5 , 10-4 , 10-3 , 10-2 )
No protocol measurement (leased lines)
............................. unframed, framed 1x64 kbit/s
........... framed 30x64 kbit/s, framed 31x64 kbit/s
Test of all ETSI supplementary services
Functional and availability test (automatic).
V5.1/V5.2 analysis
Carrying bag for the WWG IBT-20 and its
accessories (handset, battery charger,
download and measuring cables and
General specifications
Power supply ............ NiCd cells or dry batteries
Operating time from NiCd cells..approx. 6 hours
Power supply from charger (LNT-1x) ........... yes
Power supply from AC line (SNT-71) ........... yes
Battery charging time ............................ 9 hours
Permitted ambient temperature
Operational range ........................... 0 to +50 oC
Maximum operational range ........ -10 to +55 oC
Storage and transport range ........-40 to +70 oC
Dimensions (w x h x d) in mm .....105 x 60 x 200
Weight of the basic instrument ...... approx. 1 kg
Test of services
Bearer Capability
HLC/LLC (high-layer / low-layer compatibility)
Built-in and/or user-defined
All types of Bearer Capability and teleservices
Test of X.25 in the D and B channels (as per
Rec. X.31, case A and B)
X.25 call set-up (SAPI = 16)
Verification of transmission integrity
Transmission: lost packets, errors
Protocols: Tracer for the D channel
(layers 1, 2 and 3)
Layer 2 and 3 statistics
Protocol analysis, tracer for TE, NT
Simulation and X.25
Analysis: layers 1, 2 and 3
Indication of transmission direction
Filtering... layer, SAPI, TEI, CR, frame length, RR
Storage of results
Storage capacity ......................... up to 100 files
Capacity ..................................................... 1 MB
Windows™ PC Detailed Decoder software
Detailed decoding of trace and monitoring files.
Test results can be downloaded to a PC.
PC-based real-time analysis of the D channel
PC-based detailed decoding in real time of
signaling in the D channel.
Ordering Information
WWG IBT-20 basic instrument .... BN 7531/40
Includes NiCd cells, carrying bag and all
accessories (handset, cables, documentation, etc.)
Software options to add new functions to your
V5.1/V5.2 protocol analysis
package .................................... BN 7531/92.23
Includes the analysis option for the WWG IBT-20
and the Windows™ PC Detailed Decoder software
V5.1/V5.2 protocol analysis
function .................................... BN 7531/92.43
WWG IBT-20 complete package.... BN 7531/41
Includes the basic instrument and all the
software options, apart from the 'V5.1/V5.2
analysis' function and WWG ISDNpartner.
Menu available in the following languages:
English, French, German, Spanish, Italian and Dutch.
Expert System package ........... BN 7531/92.21
Includes the PC-based expert system for the
WWG IBT-20 and WWG ISDNpartner.
WWG ISDNpartner software ........ BN 7519/10
© 2000 Wavetek Wandel Goltermann, Inc. • Specifications subject to change without notice • LL/RN/DS02/0200/AE
Windows is a trademark of Microsoft Corporation.
ISO 9001
Certificate No 20462
Wandel & Goltermann CTS
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Arbachtalstrasse 6
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Tel + 49 7121 86 2222
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Postfach 13
Elisabethstrasse 36
A-2500 Baden
Tel + 43 22 52 85 521 0
Fax +43 22 52 80 727
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Tel +7 095 248 2508
Fax +7 095 248 4189
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Tel +1 919 941 5730
Fax +1 919 941 5751
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Tel +55 11 5503 3800
Fax +55 11 5505 1598
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South Melbourne,
Victoria 3205
Tel + 61 39 690 6700
Fax +61 39 690 6750
Internet address