ARGUS
1
ARGUS 3u plus /3u NT
ARGUS 3u
Manual
plus
NT
/ 3u
ARGUS
2
ARGUS 3u plus /3u NT
by intec Gesellschaft für Informationstechnik mbH
D-58507 Lüdenscheid, Germany, 2007
Alle Rechte, auch der Übersetzung, vorbehalten. Kein Teil
des Werkes darf in irgendeiner Form (Druck, Fotokopie,
Mikrofilm oder einem anderen Verfahren) ohne schriftliche
Genehmigung reproduziert, vervielfältigt oder verbreitet werden.
All rights are reserved. No one is permitted to reproduce or
duplicate, in any form, the whole or part of this document
without intec´s permission.
Version: 1.0
ARGUS
3
ARGUS 3u plus /3u NT
1 Introduction ......................................................... 5
2 Safety Instructions ............................................. 9
3 Technical data ................................................... 10
4 Operation ........................................................... 13
5 Menu Hierarchy ................................................. 17
6 Automatic Access Test .................................... 21
7 Setting the type of access ............................... 26
7.1 Line Test ............................................................ 27
8 Select the Access Mode ................................... 31
8.1 Operation on a BRI or U-Interface access ...... 31
8.1.1 TE-Simulation mode .................................. 31
8.1.2 Permanent circuit ....................................... 32
8.1.3 BRI Passive Trace/Monitor (optional) ........ 37
8.1.4 Recorder .................................................... 39
8.1.4.1 Administration of the recorded data ........ 41
8.2 Operation on a POTS (analog) access ........... 44
8.2.1 POTS terminal ........................................... 44
8.2.2 POTS monitor ............................................ 45
9 Single Tests ...................................................... 47
9.1 Test the Supplementary Services ................... 47
9.1.1 Suppl. Services Test for 1TR6 Protocol .... 47
9.1.2 Suppl.service interrogation in DSS1 .......... 49
9.1.3 Suppl. Services Tests – Error messages .. 53
9.2 Service check .................................................... 54
9.3 Bit error test ...................................................... 58
9.3.1 Start BERT ................................................ 60
9.3.1.1 BERT - saving ........................................ 64
9.3.1.2 Display the saved BERT results ............. 65
9.3.2 BERT wait ..................................................66
9.3.3 B-channel loop ...........................................67
9.4 X.31 Test ............................................................ 68
9.4.1 Automatic X.31-Test .................................. 68
9.4.2 Manual X.31 Test ...................................... 70
9.5 CF Interrogation ................................................ 72
9.6 CF - Activation .................................................. 74
9.7 CF - Delete ......................................................... 75
9.8 MSN Interrogation (only on a BRI with DSS1) 76
9.9 Time measuring ............................................... 77
9.9.1 Connection setup time ............................... 78
9.9.2 Time measurement: B-channel delay ........ 79
9.9.3 Time measurement: Interchannel delay .... 81
ARGUS
4
ARGUS 3u plus /3u NT
10 Connection ....................................................... 83
10.1 Setting up an ISDN connection ....................... 83
10.2 Clearing down an ISDN connection ............... 90
10.3 Operation on a POTS (analog) access ........... 92
11 Test Manager .................................................... 94
11.1 Simultaneously Starting Several Tests .......... 95
11.2 Switching Between Tests ................................ 98
11.3 Cancel All .......................................................... 98
12 Automatic Test ................................................. 99
12.1 Automatic Start test ....................................... 101
12.2 Display Results .............................................. 104
12.3 Sending the results of a tests to a PC .......... 105
12.4 Deleting the results of a test ......................... 106
12.5 Sending the results of all tests to a PC ........ 107
13 Level Measuring ............................................ 108
13.1 Level measuring on a BRI access ................ 108
13.2 Voltage measurement on a U-interface ........ 109
13.3 Voltage measurement on a POTS access .... 111
14 L1 status ......................................................... 112
14.1 The L1 status of a BRI access ...................... 112
15 Configuration .................................................. 113
15.1 Trace/Remote ................................................. 113
15.2 Configuration: ISDN ....................................... 115
15.3 Configuration: BERT ...................................... 119
15.4 Configuration: POTS ...................................... 122
15.5 Configuration: X.31 ........................................ 125
15.6 Configuration: ARGUS .................................. 126
15.7 Saving Call Numbers ..................................... 129
15.8 Reset ............................................................... 131
16 Accu servicing ................................................ 133
16.1 Automatic recharging of the accumulators . 133
16.2 Manual accumulator servicing ..................... 134
17 Testing Features with the Keypad ................ 135
18 Appendix ......................................................... 137
A) Acronyms ................................................... 137
B) CAUSE-Messages – DSS1 Protocol .......... 140
C) CAUSE-Messages – 1TR6 Protocol .......... 142
D) ARGUS Error Messages ........................... 144
1 Introduction
5
ARGUS 3u plus /3u NT
1 Introduction
The ARGUS 3u installation tester makes installation work
and trouble shooting on BRI and POTS accesses both safe
and uncomplicated. Additionally, the ARGUS 3u also
supports U-interface accesses. With its rechargeable
batteries and internal charger, the ARGUS 3u is
exceptionally well suited for use in the field. The intuitive
menu operation combines convenient cursor keys and
softkeys with a four-line backlit display.
Besides automatic access tests, service checks and
supplementary services tests, the ARGUS 3u also supports
among others physical measurements with evaluation,
cabling tests, and bit error rate measurements
The ARGUS can be enhanced with the WINplus software
package, which enables linking the ARGUS to a PC.
WINplus can be used to load changes to the protocols or
new functions into the ARGUS at any time (software
updates free of charge at www.argus.info).
If you use the ARGUS on a BRI in an ISDN system whose
specifications deviate from the (DIN ETS 300 102) standard
(e.g. some networked PBXs), you must take these
manufacturer-specific modifications into account. In such
cases, please contact the distributor of your ISDN PBX for
assistance.
The ARGUS Functions - Overview:
Protocol Recognition and B-Channel Test for ISDN
Accesses
After you select the operation mode, the ARGUS will
automatically determine the protocol used by the access
under test and will then test the availability of the Bchannels.
Telephone connections
Can a telephone call be placed from this access to every
other number and/or can this access receive a call?
1 Introduction
6
ARGUS 3u plus /3u NT
Service Tests
Does the tested access support connections with the most
important services, such as, ISDN telephone service, Group
4 - Facsimile or datatransmission at 64 kbit/s etc.?
Additionally, 3 user-specific services can be saved in the
ARGUS and tested on the access under test.
Bit error tests (BERT)
Performs a BERT in an extended call to itself via a loopbox
or in end-to-end operation. The ARGUS will, if needed,
handle the loopbox function itself.
Supplementary Services
The ARGUS automatically tests the supplementary services
made available by the exchange.
Leased Line Tests – tests permanent circuits with BERT
and speech
POTS functionality (does not apply for the 3u basic)
Does the POTs access support call number transfer?
Monitoring a POTS access (passive listening-in)
(does not apply for the 3u basic)
Passive trace on a BRI access
Line Test (optional)
Checks the terminating resistors for the cabling of a fourwire bus.
Detects cabling problems (e.g. broken wires, short-circuits
or crossed wires).
CF Interrogation
The ARGUS will check, whether a call diversion has been
setup on the access under test. The ARGUS can setup or
clear down call diversions in the exchange.
MSN interrogation (only on a BRI access)
On a P-MP access using the DSS1 protocol, the ARGUS
will determine the MSNs of the access under test.
1 Introduction
7
ARGUS 3u plus /3u NT
Access Acceptance Reports (with optional WINplus)
When the ARGUS is linked to a PC via the serial interface, it
is, as an example, possible to create and print a
comprehensive test report on the PC.
Testing Features with the Keypad
Supports manual tests in the so-called keypad mode. If the
network supports this feature, the user can send a command
sequence and can then test service features in a dialog.
Should you have any further questions, please contact us:
intec Gesellschaft für Informationstechnik mbH
Rahmedestr. 90
D-58507 Lüdenscheid
Tel.: +49 (0) 2351 / 9070-0
Fax: +49 (0) 2351 / 9070-70
1 Introduction
8
ARGUS 3u plus /3u NT
2 Safety Instructions
9
ARGUS 3u plus /3u NT
2 Safety Instructions
The ARGUS may only be used with the included
accessories. Usage of other accessories may lead to
erroneous measurements and may even cause damage to
the ARGUS and the connected installation.
The ARGUS is only to be used in accordance with the
instructions in this documentation. Any other usage may
result in bodily injury and destruction of the ARGUS.
• To prevent electrical shocks or damage to the ARGUS,
do not connect it to lines with voltages in excess of
100V!
• Never attempt a measurement with the case open!
• The ARGUS is not watertight. Protect the ARGUS from
exposure to water!
• Do not use batteries in the ARGUS3u; this tester is
designed to be used with - and to automatically charge accumulators (rechargeable batteries).
(see page 133 Accu servicing)
3 Technical data
10
ARGUS 3u plus /3u NT
3 Technical data
Dimensions /
Weight
Height 229 mm
Width 72 mm
Depth 35 mm
Weight 350 g (without
batteries and protective
case)
Keypad
21 Keys
LCD display
LCD display with
switchable
background lighting
Inputs / Outputs
1 RJ45 for BRI, UInterface or POTS
access
1 jack for an external
power supply
1 RJ45 for
Line Test (optional) and
serial transfer
Temperature Ranges
Ambient-temperature:
0 °C to +50 °C
4 lines with 16 characters
Memory
EEPROM Non-volatile
memory:
16 kBytes
Flash program
memory: 2 Mbyte
S-RAM: 512 Kbytes
Operating
temperature:
-5 °C to +55 °C
Power
Supply
9 V, plug-in power
supply
or
BRI feed
ARGUS 3u only:
3 Accumulators AA
(Mignons) NiMH
1600mAh
13
ARGUS 3u plus /3u NT
4 Operation
LCD display
4x16 characters
Numerical keypad
4 Operation
Receiver inset
LEDs
Soft keys
Menu control
Confirmation key
Layer 1 measurement
Calling
Pickup / Hang up
Power
Microphone
Fastener for
shoulder strap
Power Key:
- To switch the ARGUS ON/OFF
- To start up again after a power down
- to switch on the display backlighting
In battery mode to save power, the
backlighting will switch off automatically after
5 seconds.
- To switch the ARGUS OFF
(must be pressed somewhat longer)
If it is turned off while the power supply
is connected, the unit will begin to charge
the accumulators. (s. Seite 133 Accu
servicing)
Confirmation key:
- Select menu or continue
Menu control:
- Open the menu list
- Scroll through lists
- Select a menu
- Select a function in an
open menu
4 Operation
14
ARGUS 3u plus /3u NT
Telephony
- Pickup or hang up
- Simplified overlap signalling: Press
the telephone key twice.
Layer 1 Measurement:
start the Layer 1 measurement
(Level/Voltage)
Number Pad:
- Entry of the digits 0....9 and of the
special characters *, # (e.g. the call number or
numerical entry in a function)
- Direct function call
(see Seite 25)
Softkeys:
The function of the 3 softkeys varies with the
situation.
The current function of each softkey is shown in
the highlighted fourth line of the display.
Connectors on the end:
• 9 V-
Connection for the external power supply. When the
power supply is plugged into this connector, the
rechargeable batteries will be disconnected.
After it is switched off, the ARGUS will automatically
recharge the accumulators(s. Seite 133 Accu servicing).
15
ARGUS 3u plus /3u NT
• Line
Pin Assignment
3/4/5/6 BRI
7/8U-interface and POTS
Connection for BRI lines
(TE simulation or monitoring)
Connection for a BRI terminal (NT-Simulation)
Connection for a POTS (analog network)
Connection for the U-interface network
• L-Test
- Connection for the optional test adapter for line tests
4 Operation
• Headset
- Connection for the Headset
4 Operation
16
ARGUS 3u plus /3u NT
Replacing the accumulators
The battery compartment for the three accumulators
(rechargeable batteries) is located on the back of the case.
Unscrew the screws to remove the cover of the case and
insert the accumulators in accordance with the polarity
marking.
Use only NiMH accumulators.
The current state of the charge will (if the ARGUS is not
connected to a power supply) be displayed graphically.
In the LCD display, a battery symbol will begin to blink, when
there is still approximately 5 minutes reserve. During this
period, it is possible that there may be audible interference
and in rare cases even malfunctions (Seite 133).
Power Down
In accu/battery operation, if the ARGUS is idle for 15
minutes, it will automatically switch to the power-down mode
(power-down). The ARGUS will remain in power-down
mode until the Power-Key is pressed again.
Reasonably enough, the ARGUS will not enter power-down
mode during a test (e.g. Loopbox) or when it is in Trace
mode.
As an alternative, it is possible to operate the ARGUS using
the included power supply. When the power supply is
connected, the accumulators are automatically
disconnected.
The ARGUS can also be powered from the BRI line. In this
case, it does not need accumulators or the plug-in power
supply.
Whenever the ARGUS is powered from the plug-in power
supply or the BRI line, the power-down mode is reasonably
enough not active.
17
ARGUS 3u plus/3u NT
5 Menu Hierarchy
Switch the ARGUS
A list of all the menus will
open
5 Menu Hierarchy
The ARGUS automatically performs
an access test and checks the
2-wire line for HF signals (page 21).
Menu
Access
Selection of the physical
access
The Access Mode menu will
open automatically
Menu
Access mode
BRI, U-Interface and POTS
The ARGUS determines
whether it is a BRI or POTS
access.
Basic Rate Interface page 26
U-Interface page 26
POTS interface ( for the 3u basic
optinal) page 26
Automatic page 26
Line Test (does not apply for the 3u
basic) page 27
BRI
TE automatic page 31
TE P-P page 31
TE P-MP page 31
NT (optional)
Recorder page 39
BRI pass. trace page 37
Monitor (optional)
Permanent circuit page 32
U-interface
POTS
TE automatic page 31
TE P-P page 31
TE P-MP page 31
Permanent circuit page 32
POTS terminal page 44
POTS monitor page 45
5 Menu Hierarchy
18
ARGUS 3u
Menu
Single
POTS
Menu
Test Manager
BRI, U Interface
Bit Error Test page 58
Supplementary
Services page 47
Service Testspage 54
X.31 Test page 68
CF Interrogation
CF Activation page 74
CF - Delete page 75
MSN Interrogation
Telephony page 92
BRI, U Interface
BERT Start
BERT Wait
B-channel
Automatically
page 72
page 76
Start new one page 95
End all page 98
Manually
Connection
setup time
B-channel
delay
Management of multiple,
simultaneous and independent
tests/connections
BRI, U Interface
Menu
Automatic Tests
The ARGUS will automatically
execute the
test sequence and save the results
in its internal Flash
BRI
Menu
Level Measuring
Start page 101
View page 104
Test data to PC page 105
Delete page 106
All tests to PC page 107
Remote end page 108
U-interface
Uk0 feed page 109
Power U page 109
POTS
Polarity page 111
19
ARGUS 3u plus/3u NT
Menu
L1 status
The ARGUS displays the current status of
Layer 1 on the BRI accesspage 112.
5 Menu Hierarchy
Menu
Settings
The ARGUS can be
configured to suit your special
requirements.
The parameters are clearly
organised in submenus (e.g.
the ISDN parameters are in
the ISDN submenu)
The default (factory) settings
can be restored by selecting
"Reset“.
Trace/Remote page 113
ISDN page 115
- Protocol
- Alerting mode
- BRI termination
- Call parameter
- Services
- Call accepted
- Voice coding
- DTMF / Keypad
- Dest. no. MSN
- CUG Index
BERT page 119
- BERT duration
(time)
- Bit patt. BRI/U
- Error level
- HRX value
POTS page 122
- POTS dial
- POTS CLIP
- DTMF parameter
- FLASH time
X.31 page 125
- TEI
- LCN
ARGUS page 126
- Menu language
- LCD contrast
- Baud rate
- Handset
- Alarm
- Feed
- Battery type
- Software option
5 Menu Hierarchy
20
ARGUS 3u
Numbers page 129
Reset page 131
Menu
Accu servicing
Charging page 133
Discharging page 133
6 Automatic Access Test
21
ARGUS 3u plus/3u NT
6 Automatic Access Test
Using the included cable, connect the ARGUS to the access
to be tested.
Power Key: Switch on the ARGUS.
The ARGUS automatically
performs an access test
(Automatic setting in the
Access menu see Page 26).
No manual entries are
required. The
The access under test (BRI,
U interface or POTS) can
also be connected
afterwards.
If the ARGUS finds a DC
voltage on the 2-wire line (UInterface or POTs), it will
check whether there is a HF
signal on the line.
With < TE >: determine the
access
If the test fails or if you wish to provoke a specific error
situation, you can manually select any interface in the
Access menu later (see “Setting the type of access” on page
26).
Initializing the ARGUS :
- Operating the ARGUS on a BRI or U-Interface access:
The ARGUS will first setup Layer 1. While Layer 1 is being
setup, LED L1 over the display will blink. If the ARGUS
cannot setup Layer 1, it will display the message "No Net“.
When the ARGUS is operated on a U-interface access, it
can take up to 2.5 minutes to activate Layer 1.
As soon as Layer 1 is successfully setup, LED L1 will light
continuously.
Once Layer 2 has been setup LED L2 will light.
6 Automatic Access Test
22
ARGUS 3u plus/3u NT
If both modes (P-P / P-MP) are found when Layer
2 on the D-channel is checked, the mode must be
selected manually (see Page 31).
If everything has been correctly detected, the ARGUS will
display the successfully found access and access mode in
the third line. Additionally, a qualitative assessment of the
level will be displayed.
The ARGUS will automatically determine the protocol or use
the manually selected protocol (see Page 116) . On a
bilingual access, the ARGUS will use the DSS1 protocol.
LED L3 will light after the ARGUS has setup Layer 3.
At the same time the ARGUS will start the B-channel test.
The results will be displayed on the ARGUS. If an error
occurs in the B-channel test (e.g. access is not plugged-in),
the ARGUS will - depending on the class of error - either
repeat the initialization or show an error message (see
ARGUS Error Messages Page 144).
The ARGUS will then idle in the Status display.
Status display example:
The ARGUS displays the
type of access (BRI), the
availability of the B-channels
(B12), a level evaluation
(OK),
the access mode (TEs), the
bus configuration (P-MP)
and the protocol (DSS1).
If you press the <RESTART>
softkey, the B-channel test
will be repeated.
Softkeys:
The current settings of the softkeys are displayed in the
fourth line.
The ARGUS is in largest part operated with the two ↓↓↓↓ ↑↑↑↑ Keys, the confirmation key ✓ and the three softkeys.
On the following pages, only the softkey's meaning in the
respective context is shown - enclosed in brackets < > ,
e.g. < NO >.
The < ✓ > softkey serves the same function as the ✓
6 Automatic Access Test
23
ARGUS 3u plus/3u NT
confirmation key and the < ↓↓↓↓ > softkey performs the same
function as the corresponding arrow key on the ARGUS
keypad.
In the example above, the test found that it is a BRI multiple
device access using the DSS1 protocol
Shown on the second line in the display:
The availability of the B-channels:
B12 both channels are available
B1- only B-channel 1 is available
B-2- only B-channel 2 is available
B-- no B-channel available
If only one B-channel is available, this can have an
impact on the service check and the testing of the
supplementary services.
Level evaluation only on a BRI access:
OK the level is in order
<< the level is too low
>> the level is too high
-- no level
Shown on the third line in the display:
Access Mode:
TEs = TE Simulation Slave Mode
TEm = TE Simulation Master Mode
Bus configuration:
P-P: Point-to-Point
P-MP: Point-to-Multipoint
It must be mentioned again, that the ARGUS only
determines the general bus status once when switched on
or when the ARGUS first connected.
On the other hand, the status of the protocol stacks for Layer
1, 2 and 3 will be continually monitored and displayed.
6 Automatic Access Test
24
ARGUS 3u plus/3u NT
- Operating the ARGUS on a POTS access (for ARGUS
3u basic optional)
The ARGUS displays the
access type (POTS) and the
line voltage when idle.
ARGUS - Main menu
Status display
Repeat Bchannel test
Main Menu
Marked
Menu
Return to
Status display
scroll
further
.
The ARGUS opens
the menu marked with
a →.
List is
continued
In the Main menu, you can scroll through the available
menus with the <↓ > key:
BRI
Access
U-interface
Access
POTS
Access
Single Tests Single Tests Single Tests
Test Manager Test Manager _______
Automat.Tests Automat.Tests Automat.Tests
Level
Measuring
Level
Measuring
Level
Measuring
L1 Status ________ _______
Configuration Configuration Configuration
Access Access Access
6 Automatic Access Test
25
ARGUS 3u plus/3u NT
Accu servicing Accu servicing Accu servicing
With the <✔>, you can open the menu currently marked with
the → (in the example Single Tests).
Name of the
opened menu
List is
continued
Return to
previously shown
Display
scroll
further
The ARGUS opens
the type of function/
submenu marked with
→ .
Using the numeric keys to start a function:
Using the numeric keys, you can start important ARGUS
functions directly, regardless of the currently active menu
level:
Numeric key 2Start Service Test
Numeric key 3 Start Supplemental Service Test
Numeric key 4 Start Auto. Test
Numeric key 6 Start Test Manager
Numeric key 7Open Speed-Dialing Memory
Numeric key 8Trace ON/OFF
Numeric key 9 Start Bit Error Rate Test (BERT)
If a function is called where the ARGUS expects the
entry of a digit, pressing a number key will be
interpreted as the expected input.
7 Setting the type of access
26
ARGUS 3u plus/3u NT
7 Setting the type of access
In the Access menu, the user must select the type of
physical access to which the ARGUS is actually connected.
If Automatic is selected, a fully-automatic sequence will be
started: The ARGUS will automatically determine the type of
interface (BRI, U interface or POTS) and set the access to
TE-mode.
Status display
If you press the <RESTART>
softkey, the B-channel test
will be repeated.
Open the Main menu
Using the < ↓ > select the
Access menu
The Access menu will open
Using the <↓> select the type
of access
(e.g. BRI access)
Confirm the access
The Access Mode menu will
open automatically.
The following applies for all
displays: If you press the < > , the ARGUS will return
to the previous display.
7 Setting the type of access
27
ARGUS 3u plus/3u NT
7.1 Line Test
The ARGUS tests the terminating resistors for the cabling of
a four-wire bus. Additionally, the test also detects errors in
the cabling e.g. any broken wires, short-circuits and crossed
wires.
Unplug the NT and all terminal equipment from the
bus, before performing a line test!
If the ARGUS detects an operator error (Line test on a fed
bus), it will emit a continuous acoustic signal. In this case, to
prevent the destruction of the ARGUS, the line test will not
be started.
Test sequence:
To perform a thorough test of the lines, the test must be
done in 2 steps.
First step:
Use the test adapter to connect the ARGUS to the lines to
be tested. In this step, the ARGUS will determine whether or
not there is a short circuit or a terminating resistor and
whether there is a fault between the terminating resistor – if
there is one – and the test adapter.
3
6
4
5
NT
U Interface
Unplug the NT!
Socket 1
BRI
Last
socket
L-Test jack
7 Setting the type of access
28
ARGUS 3u plus/3u NT
Possible test results:
- The ARGUS has detected a short-circuit: Clear the fault
and repeat the test
- The ARGUS reports that the resistance is wrong:
Repeat the test from another socket, if necessary
remove the terminating resistor(s)
- The ARGUS reports that the line is OK: Continue test
with step 2
Second step:
Connect the test adapter to the jack, which was tested as
OK in the first step. Connect the ARGUS via its L-Test jack
to the next socket on the bus.
3
6
4
NT
5
U Interface
Unplug the NT!
Socket
BRI
Last
socket
L-Test jack
Possible test results:
- The ARGUS reports broken connections or crossed
wires: Clear the fault and repeat the test beginning with
the first step.
- The ARGUS reports that the line is OK: Connect the
ARGUS (L-Test jack) to each of the sockets on the bus
one after the other.
7 Setting the type of access
29
ARGUS 3u plus/3u NT
Test steps on the ARGUS:
With the <↓>, select
Line Test.
Start the Line Test
Sample test results – Line Test:
No errors occurred.
Wires 3 and 6 are crossed.
If the message “Crossed
wires: Term. wrong”, the measurement conditions
with respect to the location or complexity of the fault
are unfavorable.
In this case, you should change the measurement
conditions in the following manner:
Remove the terminating resistors from the bus and
repeat the test.
Frequently it is enough to simply swap the test
adapter and the ARGUS.
Comments about the test results:
- The bus can first be considered to be free of defects,
when all of the sockets have been tested as OK.
- Short-circuits are reported as a resistance value < 10 ΩΩΩΩ.
- Crossed wires and broken connections between the test
adapter and the terminating resistor cannot be found.
7 Setting the type of access
30
ARGUS 3u plus/3u NT
- The displayed test results are either for just the bus lines
between the ARGUS and the test adapter in the case of
cross-wires and broken connections or for the entire bus
in the event of short-circuits and terminations.
8 Select the Access Mode
31
ARGUS 3u plus/3u NT
8 Select the Access Mode
The Access Mode menu is
not selectable from the Main
menu.
It opens automatically once
the physical access is
selected in the Access menu.
8.1 Operation on a BRI or U-Interface access
8.1.1 TE-Simulation mode
TE automatic
On a BRI or U-interface access, the ARGUS will
automatically determined the D-channel Layer 2 mode
(PP or P-MP). If the ARGUS determines that the access
supports both modes, the following Configuration menu
will open:
Using the <↓ >, select L2
mode
.
Confirm the selected L2
mode
The ARGUS will return
to the
Main menu.
TE P-P or TE P-MP
Afterwards, the access and the protocol stack will be
initialized in accordance with the selected setting.
The ARGUS will then jump to the Main menu.
8 Select the Access Mode
32
ARGUS 3u plus/3u NT
8.1.2 Permanent circuit
With the <↓ >, select
Permanent switch.
Access mode confirmed
The ARGUS is now switched
to Permanent circuit mode
(the display shows LL
[Leased Line]) and will open
the Status display.
Besides dial-up connections
to any subscriber, ISDN also supports the use of permanent
circuits switched to a specific remote location.
These permanent circuits are available after setting up
Layer 1, in other words after synchronizing both terminals by
exchanging HDLC-frames.
As a quick test of a permanent circuit, you can simply call
the opposite end using a selected B-channel.
However, for a more revealing test of a permanent circuit,
you should perform a bit error rate test.
Both ends of the permanent circuit must use the same
channel.
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