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TEK1405 ISDN S0 Simulator/Monitor
Features
- TE and NT Simulator with Selectable Physical Characteristics
- Simulation of a Conforming Terminal Equipment (Reference TE) for Validating
an S0 Tester
- Simulation of a Deliberately Non-conforming Terminal Equipment for
"Worst-Case" Tests on PBXs
- S0 Bus Monitor with Layer 1 Status Display for Fault Analysis
in Existing Systems
The K1405 ISDN S0 Simulator/Monitor is designed
for carrying out investigations at the S0 interface. The K1405
simulates the ISDN components such as a Network Terminator (NT) or Terminal
Equipment (TE) with selectable layer 1 characteristics. In addition, the
K1405 can be connected to the S0 bus as a monitor.
The K1405 provides a large degree of freedom in manipulating
the characteristics defined as per Recommendations ITU-T I.430. It is
possible to set it up for "worst case" values.
The K1405 contains a universal ISDN S0 interface
whose characteristics are programmable and conveniently controllage in-service
via a PC. The user interface is Microsoft Windows®. A multiplicity
of connection options make numerous different applications possible.
The K1405 can be operated as an automatic "state machine,"
both in the TE and NT mode or can be controlled by the user manually in
all functions. All the important physical characteristics such as reaction
times, delays, or output amplitude can be set. In addition, standardized,
error-free or errored output sequences (INFOs) can be transmitted and
detected. Several transmit patterns are provided for the B channels.
Design and Mode of Operation
The K1405 is comprised of the mainframe with an S0
interface card, two connection modules, an instrument panel and a built-in
AC line adapter.
The setting of the required operating mode and all the instrument
parameters is effected via the V.24 interface. The required commands,
parameter settings, and result fields are managed by the PC software supplied.
This enables all the functions of the instrument to be used to the full.
The K1405 is accommodated in a case that can be mounted
in 19" bays.
Operating Systems K1405 As TE/NT Simulator
The S0 simulator is used to simulate reproducible,
field-oriented, and flexibly configurable environmental conditions at
the basic access, including not only the procedural operations but also
the electrical characteristics of the item under test. The following parameters
can be set in the TE/NT simulation mode.
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Parameter
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Measurement
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Mode
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Round-trip delay
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Delay of the K1405 output signal
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TE
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Phase jitter
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Jitter amplitude of the K1405 output signal
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TE
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Output amplitude
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Output signal amplitude of the K1405
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TE/NT
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Terminating resistor
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TR on/off
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TE/NT
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Data Interface
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Enable B channels
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The B channels (B1, B2 or B1+B2) are added or dropped.
PRBS, and also fixed bit patterns, can be selected.
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TE/NT
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Data loop
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The received B channel data can be looped back.
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TE/NT
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Enable D channels
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The D channels are added and dropped. Fixed output
pattern is selectable.
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TE/NT
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Enable E channel
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The internal adding and dropping of E channel is
activated. It is possible to choose between fixed data pattern
and data loop (from D channel into E channel).
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NT
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K1405 As Manually Controlled TE/NT
In the TE/NT test mode the K1405 can be operated under manual
control, allowing the layer 1 states to be halted. All the functions are
executed regardless of the response of the NT or other TEs on the S0
bus. This operating mode eases the task of analyzing and troubleshooting
In the TE test mode the following transmit INFO can be selected
and sent:
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INFO0
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All-zeros level is sent.
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INFO1
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The TE activation signal is sent to NT. This is
a string of double pulses with 24-kHz repetition frequency.
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INFO3_BASIC
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INFO3 is sent with binary '1' in the B and D channels.
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INFO3_SFL
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INFO3 is sent without F/L bits.
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INFO3_SFAL
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INFO3 is sent without FA/L bits.
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IX_96 kHz
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Binary '0' is sent continuously.
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In the NT test mode the following transmit INFO can be selected
and sent:
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INFO0
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All-zeros level is sent.
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INFO2
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The NT activation signal and synchronizing signal
is sent to TE. This is a string of double pulses with a code violation
at the start of the frame (high density pattern).
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INFO4_BASIC
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An INFO4 is sent with binary '1' in the B and D
channels.
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INFO4_noFlag
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An INFO4 is sent without F/L bits.
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INFO4_viol16
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An INFO4 is sent with a code violation in the 16th
frame bit.
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IX_96 kHz
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Binary '0' is sent continuously.
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K1405 in the TE/NT "State Machine" Mode
Generating the conforming and deliberately non-conforming
state diagrams provides the K1405 with the characteristics required
of a "functional layer 1 reference". A conforming state change
is green and a non-conforming state red. The parameter sets with the
supplementary information can be stored. This menu item is used to set
all the settable timers of the state machine, to select trigger events,
and to define the synchronization characteristics of the K1405. The
following parameters can be set
In the TE Mode:
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Interstate reaction times
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F2->F6, F2->F7, F3->F6, F3->F7, F4->F5, F5->F6,
F5->F7, F6->F3, F6->F7, F7->F6, F7->F3, F8->F3
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Timers
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T3
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Trigger signals
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F1, F2, F3, F4, F5, F6, F7, F8
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Frame count n, m
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'n' sets the frame count for the change to F8,
and 'm' the count for the change to F7.
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In the NT Mode:
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Interstate reaction times
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G1 -> G2, G4 -> G1
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Timers
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T1, T2
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Trigger signals
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G1, G2, G3, G4
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Frame count n, m
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'n' sets the frame count for the change G3 to
G2, and 'm' the count for the change G2 to G3.
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The Following Commands Can Be Sent in the "state Machine" Mode:
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START
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The "state machine" is activated, i.e.
the automatic run has started.
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PAUSE
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The automatic run is interrupted. The "state
machine" can thus be frozen in certain states.
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CONTINUE
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The automatic run is resumed.
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STOP
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The "state machine" is deactivated,
i.e. the automatic run is ended.
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PH-AR
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With the "state machine" activated,
this command causes layer 1 to be activated towards NT/TE (call
upstream/downstream). The activation signal INFO1/INFO2 is sent.
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MPH-DR
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This command causes layer 1 to be deactivated
towards TE.
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K1405 As Layer 1 Monitor
The monitor mode enables the user to test and analyze
layer 1 problems on existing ISDN S0 systems. In the monitor
window, the detected TE and NT INFOs and the TE and NT states interpreted
from them are each recorded with time stamping. The time difference
between two events and also the detected S0 power are likewise
displayed. The buttons on the right of the screen are used to start,
stop, reset, and delete the recording. The recorded data can be printed
and stored as ASCII logfiles.
In the Monitor Mode the Following Parameters Can Be Set:
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Trigger signal
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This is used to select an INFO which, when detected
by the K1405, results in a trigger signal at the TRIG jack.
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Terminating resistor
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TR on/off
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Specifications
Physical Characteristics
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Dimensions
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mm
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Width
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343
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Height
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191
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Depth
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540
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Weight
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kg
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Net
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approximately 9
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Ordering Information
K1405 ISDN S 0 Simulator/Monitor
Includes: Power cable, 2.5 m,
one cable RJ45 with 2 plugs, 1.5 m (7KK1200-5CL11).
With 230 V Power Supply - AC 48
to 63 Hz - Order 7KK1405-8AA.
With 115 V Power Supply - AC 48
to 63 Hz - Order 7KK1405-8AB.
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MetricTest
Solutions
