Argus 151 User manual

ARGUS
ARGUS 151 1
ARGUS 151
Manual
Version: 2.20 / EN
Important note:
An ARGUS basic package contains at least one DSL interface (ADSL or VDSL), which
includes a variety of functions and tests. All other interfaces and functions are available as
options (see datasheet). Therefore, depending on the scope of function supplied, individual
menu options may be hidden.

ARGUS
2ARGUS 151
 by intec Gesellschaft für Informationstechnik mbH
D-58507 Lüdenscheid, Germany, 08/2016
All rights, including translation rights, reserved. No part of this work may be reproduced,
duplicated or disseminated in any form (print, photocopy, microfilm or any other method)
without written consent.
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.

ARGUS
ARGUS 151 3
1Introduction .........................................................................................6
2Safety information ..............................................................................9
2.1 Safety and transport information for the battery pack ..................11
3General technical data .....................................................................13
4Quick-start guide ..............................................................................15
5Configuring accesses ......................................................................21
5.1 Access wizard ...................................................................................22
5.2 Phys. parameters ..............................................................................26
5.3 Profile .................................................................................................27
5.4 Notices ...............................................................................................29
6Physical layer ....................................................................................32
7Operation on xDSL accesses ..........................................................33
7.1 Configuring the xDSL interface .......................................................34
7.2 xDSL settings ....................................................................................35
7.3 ARGUS in access mode xTU-R .......................................................41
7.4 ARGUS in access mode xTU-R bridge ...........................................64
7.5 ARGUS in access mode xTU-R router ............................................66
8Operation with Ethernet accesses ..................................................68
8.1 Configuring the Ethernet interface .................................................69
8.2 Ethernet settings ..............................................................................70
8.3 Establishing an Ethernet connection .............................................71
9Virtual lines (VL) ...............................................................................73
9.1 Virtual lines in the status screen .....................................................73
9.2 Virtual line profiles (VL profiles) .....................................................75
9.3 Activating a virtual line ....................................................................77
9.3.1 Starting a service .......................................................................77
9.3.2 Assigning additional virtual lines ................................................78
9.4 Virtual line settings ...........................................................................83
9.5 Displaying protocol statistics ..........................................................90
10 Services .............................................................................................94
10.1 Displaying service statistics ............................................................95
11 Overview of tests andhotkey assignment ......................................96
12 Loop .................................................................................................100
13 ATM tests .........................................................................................106
13.1 VPI/VCI scan ....................................................................................106
13.2 ATM-OAM ping ................................................................................109

ARGUS
4ARGUS 151
14 IP tests .............................................................................................112
14.1 IP ping ..............................................................................................112
14.2 Traceroute .......................................................................................118
14.3 HTTP download ...............................................................................122
14.4 FTP download .................................................................................127
14.5 FTP upload ......................................................................................131
14.6 FTP server .......................................................................................135
15 VoIP tests ........................................................................................142
15.1 Starting VoIP telephony .................................................................150
15.1.1 VoIP back-to-back .................................................................158
15.2 VoIP wait ..........................................................................................159
16 IPTV tests ........................................................................................162
16.1 IPTV ..................................................................................................162
16.1.1 Multiple virtual lines ...............................................................166
16.2 IPTV scan .........................................................................................177
16.3 IPTV passive ....................................................................................184
16.4 Video on demand (VoD) .................................................................188
17 Parallel tests ....................................................................................196
18 Auto tests ........................................................................................202
19 Copper tests ....................................................................................206
19.1 R measurement ...............................................................................206
19.1.1 Wire types ..............................................................................207
19.1.2 Starting R measurement ........................................................209
19.2 RC measurement ............................................................................211
19.3 Line scope .......................................................................................213
19.3.1 Starting the line scope ...........................................................213
19.3.2 Graph functions .....................................................................216
19.4 Active Probe ....................................................................................224
19.4.1 Active Probe II .......................................................................224
19.4.2 Connecting the Active Probe II ..............................................225
19.4.3 Starting Active Probe II (example with line scope) .................225
19.5 TDR ..................................................................................................228
19.5.1 TDR settings ..........................................................................228
19.5.2 Starting TDR ..........................................................................228
19.5.3 Graph functions .....................................................................230
19.5.4 Examples ...............................................................................235




ARGUS
ARGUS 151 5
20 Ethernet cable tests ........................................................................239
20.1 Configuring the Ethernet interface ...............................................239
20.2 Ethernet cable test settings ...........................................................239
20.3 Ethernet cable test ..........................................................................241
20.3.1 Starting Ethernet cable test ...................................................241
20.4 Ethernet port flash ..........................................................................245
20.4.1 Starting Ethernet port flash ....................................................245
21 Test results ......................................................................................247
21.1 Saving test results ..........................................................................248
21.2 Displaying saved test results ........................................................249
21.3 Sending test results to a PC ..........................................................249
21.4 Delete test results ...........................................................................250
21.5 Sending all test results to PC ........................................................250
21.6 Deleting all test results ..................................................................251
22 WLAN ...............................................................................................252
22.1 Starting WLAN ................................................................................253
22.2 Test results via WLAN ....................................................................254
22.3 WLAN in router mode .....................................................................255
23 ARGUS settings ..............................................................................256
23.1 Configuring the device ...................................................................256
23.2 Backing up and restoring settings ................................................261
23.3 Restoring the factory settings .......................................................263
24 Using the battery pack ...................................................................264
25 Firmware update .............................................................................266
26 Appendix .........................................................................................269
A) Abbreviations ...................................................................................269
B) Vendor identification numbers .........................................................276
C) Error message: PPP connection ......................................................277
D) Error message: Download test ........................................................278
E) HTTP status codes: .........................................................................279
F) General Error Messages ..................................................................281
G) VoIP SIP status codes .....................................................................282
H) Software Licenses ...........................................................................285
I) Index ................................................................................................286

1 Introduction
6ARGUS 151
1 Introduction
ARGUS 151: compact, versatile and easy to use
Handy Tester with multiple functions: The new ARGUS 151 combines state-of-the-art
VDSL Vectoring measurement tech-nology and many features, that makes work easier in a
compact, easy-to-use device - and all that at a very competitive price. The VDSL+ADSL
tester (Annex A + B + J + L + M), which is ready for operation within a few seconds,
supports VDSL Vectoring and comes with a Gigabit Ethernet interface (10/100/1000 
Base-T) for downloads with multiple 100 Mbit/s. Resistance, Capacitance and voltage
measurement are integrated into this all-rounder.
Paralell Triple play tests
On request for quick and simple testing, parallel triple play tests like VoIP (Voice over IP),
IPTV and other data tests are available, which are increasingly being provided via the more
powerful IPv6 protocol and are in need of testing. The ARGUS 151 cannot just simulate the
terminal equipment such as telephone, PC or set-top box (STB) but can also determine all
the relevant quality parameters.

Copper test set (Cu tests)
Copper tests (Cu tests) for physical line qualification without synchronization with the
DSLAM are always included. If necessary, these tests can also be considerably extended
in the field by simply connecting the compact ARGUS Copper Box via USB, thus enabling
all important electrical parameters such as voltage, current, isolation resistance, LCL,
NEXT and many more, to be automatically and quickly determined via tip, ring and ground.

The TDR (Time Domain Reflectometer) function makes it possible to measure line lengths
and trace sources of faults. A high-impedance connection enables a Line Scope to display
the time and frequency domains (FFT) in real time.
The optional Active Probe II, which is required for this, can be connected to an existing DSL
connection and switched between symmetrical and asymmetrical operation.
Easy operation
The large 320 x 240 pixel colour display and an intuitive menu structure, among other
things, guarantee user-friendly operation. A high-performance Li-Ion battery pack ensures
long operating times in the field.
You can download free software updates to ARGUS from you PC at any time. Updates are
available at www.argus.info/en/service/downloads.

1 Introduction
ARGUS 151 7
Overview of key ARGUS functions:
xDSL interfaces (ADSL, ADSL2, ADSL2+, VDSL2)
- Synchronisation with DSLAM (xTU-C) and determination of all relevant
connection parameters and error counters
- Bridge, router and terminal-device modes, via IPv4 and IPv6
Ethernet interfaces
- Gigabit Ethernet test interfaces (10/100/1000 Base-T)
- Ethernet cabling tests
IP and ATM tests via xDSL and Ethernet
- ATM Tests (only for ADSL)
- ATM-OAM ping, ATM-OAM cell loop, VPI/VCI scan
- IP tests
- Ping and traceroute tests (BRAS information, PPP trace, VLAN), via IPv4 and IPv6
- Download tests for measuring throughput (HTTP-download, FTP-up/download)
- FTP server test, up/download from ARGUS to ARGUS
- Parallel testing of multiple services (VoIP, IPTV,...)
- VoIP test
- VoIP terminal device simulation, including acoustics (var. codecs), via IPv4 and IPv6
- OK/FAIL assessment of VoIP speech quality (QoS) according to:
- MOSCQE (ITU-T P.800), E-model (ITU-T G.107)
- IPTV tests
- Stream request (STB mode), IPTV channel scan, IPTV passive
- OK/FAIL assessment and display of quality parameters
Copper test (Cu test) functions
- Copper Box: expansion of the ARGUS copper test function, see ARGUS Copper Box
manual
- R-measurement: ARGUS continually measures resistance and displays the values in
real time (loop resistance)
- RC measurement: Test of loop resistance or capacitance of open line (including 
calculation of line length)
- Line Scope: High-performance realtime Line Scope with display in time and 
frequency range (FFT) up to 30 MHz
- TDR: Time domain reflectometer to measure line lengths and locate faults
Local loop acceptance log
When connected to a PC via a USB port, ARGUS can be used to generate and print out a
detailed measurement log on the PC using the software WINplus.

1 Introduction
8ARGUS 151
Note:
Detailed explanations regarding the Copper Box may be found in the separate
documentation for the respective device.
You should receive these together with your equipment. You can also download
the latest manuals at http://www.argus.info/en/service/downloads, or simply
contact our Service Department:
intec Gesellschaft für Informationstechnik mbH
Rahmedestr. 90
D-58507 Lüdenscheid
Tel.: [phone] / 9070-0
Fax: [phone] / 9070-70
www.argus.info/en
[email protected]

2 Safety information
ARGUS 151 9
2 Safety information
ARGUS may only be operated using the accessories supplied with the device. The use of
other accessories can result in faulty measurements or even damage to ARGUS and the
connected equipment. Only use ARGUS according to the instructions contained in this
accompanying document. Use in any other manner can cause harm to persons or destroy
your ARGUS.
- Before connecting ARGUS to an access, make sure that no dangerous
voltages or voltages for which ARGUS and its accessories are not specified
are present. Also keep in mind that the voltage can change over the time that
the device is connected.
- Use ARGUS only according to its intended purpose at all interfaces and local
loops.
- Voltages over 50 V AC and 120 V DC can cause death.
- Never conduct measurements without the battery pack!
- ARGUS is not waterproof. Therefore, protect ARGUS against water
penetration.
- Before replacing the battery pack, disconnect the power adapter and all
measuring leads and power ARGUS down.
ATTENTION: Never remove the battery pack during operation.
- Remove the power adapter from the mains socket as soon as ARGUS is
switched off or no longer in use (e.g.after charging the battery pack)!
- ARGUS may only be used by trained personnel.
- ARGUS may only be operated using the power adapter supplied with the
device.
- Only manufacturer-approved headsets may be connected to the headset
socket; any other use of this socket (e.g. connection to a home entertainment
system) is expressly prohibited.
- Only the Active Probe II, the ARGUS Copper Box and the other
manufacturer-approved USB devices without mains connection may be
connected to the USB host interface (USB-A). Any other use (e.g. connection
to a PC) is expressly prohibited.
- If external USB devices are used on the USB-host interface (USB-A), no
warranty is assumed for occurrences outside the mechanical wear of normal
plug-in.
- In battery power mode, always cover the ARGUS power socket with the
supplied rubber protective cap labelled "Power".
- The electromagnetic compatibility (EMC) has been tested according to the
regulations specified in our conformity declaration.
ARGUS is a class A device. This device can cause radio interference in
residential areas. In this case, the user may be required to implement
appropriate measures.

2 Safety information
10 ARGUS 151
Return and environmentally compatible disposal
Currently applicable environmental legislation restricts the use of certain hazardous
substances in electrical and electronic devices, particularly the concentration respectively
use of lead (Pb), cadmium (Cd), mercury (Hg), hexavalent chromium [Cr(VI)],
polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE).

We hereby affirm on the basis of the assurances, designations and documentation of our
suppliers that all our ARGUS-brand measurement technology products are free of
substances in concentrations, preparations or applications whose market release is
prohibited pursuant to the applicable requirements of the RoHS Directive 2011/65/EU of the
European Parliament and Council dated 8 June 2011. Our EAR registration number is:
WEEE reg. no. DE 92829367.

Since October 2005, we have been marking all our measuring devices with this symbol, in
compliance with WEEE 2002/96/EC and the corresponding German statute ElektroG:
( (DIN EN 50419).
In other words, ARGUS and its accessories, may not be disposed of as household waste.
Please consult with our Service department with respect to the return of old devices.
- Active charging of the battery pack and automatic charging (on by default)
may only be carried out in a temperature range of 0 °C to +40 °C.
- The device may not be used during thunderstorms.
- If ARGUS is operated under extreme conditions, it can be set to energy-
saving mode to protect the device and the user; this can interrupt the running
test and drop the connection. 
To ensure dependable extended operation of ARGUS, always make sure that
it is optimally protected against high temperatures.
- The device may not be opened.
- Please observe the following safety and transport information when using the
lithium-ion battery pack.
- Before starting a test or synchronising on an interface, determine how you
want to supply power to ARGUS (battery pack or power adapter). The car
adapter is only for charging the device. When ARGUS is connected to this
adapter, you should not run any tests or synchronise on a DSL interface.

2 Safety information
ARGUS 151 11
2.1 Safety and transport information for the battery pack
Transport
The battery pack has been tested according to the UN directive(ST/SG/AC.10/11/Rev. 4,
part III., subchapter 38.3). Protective functions have been implemented to guard against
short-circuit, destruction and dangerous reverse currents. As the battery pack contains a
lithium quantity below current thresholds, it is not subject to international regulations 
governing hazardous materials either as an individual part or mounted in ARGUS. When
transporting multiple battery packs, however, you may also need to observe this safety
information. Further information is available on request.
Failure to observe the following danger and warning information can impair
the protective functions of the battery pack. This can cause extremely high
voltages and currents which can in turn result in abnormal chemical
reactions, acid leaks, overheating, smoke, explosion and/or fire. Additionally,
failure to observe this information can negatively impact both the
performance capacity and the performance duration.

Hazard information and warnings
1. Do not disassemble or short-circuit the battery pack.
2. Do not through the battery pack into fire or overheat it (> 60 °C).
3. The battery pack must not become wet or damp.
4. Active charging of the battery pack and automatic charging (on by default) may
only be carried out in a temperature range of 0 °C to +40 °C. 
To maximise battery life, do not store the battery long-term at temperatures above
+50 °C.
5. The battery pack may only be charged using the corresponding ARGUS device or
an approved charger.
6. Do not puncture the battery pack with a sharp object.
7. Do not throw the battery pack or expose it to shocks.
8. Do not use battery packs that have become damaged or deformed.
9. The battery pack contacts have a specific polarity and may not be inserted in
ARGUS or a charging device with reverse polarity.
10. Only connect the battery pack to the corresponding ARGUS or charger in the
intended manner.
11. The battery pack may not be directly connected to electrical outputs such as
power adapters, car adapters etc.
12. Only use the battery pack with ARGUS.
13. Do not attach, transport or store the battery pack together with metallic objects.
14. Do not expose the battery pack to electrostatic charges.
15. The battery pack may not be charged or discharged together with primary
batteries or other battery packs.

2 Safety information
12 ARGUS 151
16. If the battery pack fails to charge by the end of the charging time, it can no longer
be recharged.
17. Do not expose the battery pack to excessive pressure.
18. If the battery pack emits odours or heat, becomes discoloured or deformed or
otherwise appears different from normal during operation, charging or storage,
immediately remove the battery pack from the device and never use it again.
19. In the event that acid leaks and comes in contact with eyes or skin, wash
immediately with clean water. Do not rub. In both cases, seek medical attention
immediately. Otherwise, permanent injury may occur.
20. Keep the battery pack away from children.
21. Read this manual and the corresponding safety information carefully before using
the battery pack.
22. If odours, rust or other abnormalities are detected before the first use, contact
intec GmbH to clarify the next steps.

3 General technical data
ARGUS 151 13
3 General technical data
ARGUS user safety tested according to EN60950-1
RoHS conformity pursuant to the WEEE directive
The electromagnetic compatibility (EMC) was tested according
to the regulations specified in our declaration of conformity.
CE marking
ARGUS 151 complies with EC directives 2004/108/EC and
2009/C197/03. We will be happy to provide a detailed
declaration of conformity on request
Device specifications
Dimensions/weight Inputs/outputs
Height: 235 mm 
Width: 97 mm 
Depth: 65 mm
Weight: approx. 730 g
(1.61 lbs)
(incl. battery pack)
- RJ-45 (Line) for xDSL and Copper tests
- Ethernet 10/100/1000 Base-T
- Ethernet 10/100 Base-T or USB-A socket, USB-
host interface
- USB-A socket, USB-host interface
- USB-B socket,USB client interface
- Headset input
Control panel
25 keys
LCD display Temperature range
LCD colour display with
switchable background
illumination 320 x 240
pixels
Temperature range for charging battery pack: 0 °C to +40 °C
Operating temperature (in battery mode): -10 °C to +50 °C
Operating temperature (with power/car adapter): 0 °C to +40 °C
Storage temperature: -20 °C to +60 °C
Humidity: up to 95 % rel. humidity, non-condensing
Power supply
Lithium ion battery pack with 7.2 V rated voltage (observe the
safety information) or 12 V/1.5 A ARGUS power adapter
Miscellaneous

3 General technical data
14 ARGUS 151
Supported standards
ADSL (Line):
ITU-T G.992.1, Annex A (ADSL)
ITU-T G.992.2, Annex A (G.lite)
ITU-T G.992.3, Annex A (ADSL2)
ITU-T G.992.5, Annex A (ADSL2+)
ITU-T G.992.1, Annex B (ADSL)
ITU-T G.992.3, Annex B (ADSL2)
ITU-T G.992.5, Annex B (ADSL2+)
ITU-T G.992.5, Annex J (ADSL2+)
ITU-T G.992.3, Annex L 
(RE-ADSL2 via analogue)
ITU-T G.992.3, Annex L 
(RE-Narrow PSD ADSL2 via POTS)
ITU-T G.992.3, Annex M (ADSL2)
ITU-T G.992.5, Annex M (ADSL2+)
ANSI T1.413
R/RC measurement (Line):
Resistance test:
- Accuracy for 20 - 100 ±10 %
- Accuracy for 100 - 100 k ±2 %
Capacitance test:
- Accuracy for 1 nF - 1 µF: ±5 %
VDSL (Line):
ITU-T G.993.2 (VDSL2)
ITU-T G.993.5, G.vector (Vectoring)
Profiles
8a, 8b, 8c, 8d, 12a, 12b, 17a, 30a
ITU-T G.998.4 (G.INP, Retransmission)

Dielectric strength:

Line:
DC: max. +200 V
AC: max. +100 Vpp (Copper tests only)
DC: max. +200 V (xDSL)
DC voltage measurements:
- Accuracy: ±2 %
Ethernet (LAN):
IEEE 802.3 
- 10 Base-T 
- 100 Base-T
- 1000 Base-T
Autonegotiation
Auto-MDI(X)

4 Quick-start guide
ARGUS 151 15
4 Quick-start guide
LEDs
Softkeys
Cursor keys
Enter key
Level key
Telephony: Answer/hang up
Power
Microphone Belt clip
Number block
LC display
Back key
Shift key
Loudspeaker
Power key
-
-
-


-



Switches on ARGUS
Reactivation after power-down (adjustable, see page 259)
Switches on display illumination (also possible with any other key). In
battery mode, the display illumination switches off automatically after an
interval that can be set in ARGUS (see page 259).
Switches off ARGUS (key must be held down): after an adjustable
interval (e.g. after 10 minutes), ARGUS automatically shuts down in
battery mode (see page 264). When the power supply is attached, the
ARGUS battery recharges automatically once the device is switched off
(see page 264 Using the battery pack)
Enter key
-
-
-
-
Opens menu
Switches to next display
Starts/opens test
Accepts setting

4 Quick-start guide
16 ARGUS 151
Back key
-

-
-
-
Switches ARGUS back to the previous display without saving current
entries, e.g. changes in a configuration parameter
Cancels tests
Exits graphic displays
Switches to main menu after powering up
Cursor keys
-
-
-


-
-
-
-
Browses display lines page by page (vertical cursor keys)
Cursor movement within a display line (horizontal cursor keys)
Within selection lists or statistics, the horizontal cursor keys can be used
to jump to the end (right cursor key) or the beginning (left cursor key) of
the displayed list
Select a menu, a function or a test
Set measuring ranges in copper test
Move display cursor in graphic displays
Select functions in graphic status screen
Telephony
xDSL (access mode xTU-R, xTU-R Router) and Ethernet
-Starts VoIP telephony
Level key
-
-
-
-
Opens the graphic status screen
xDSL access: displays results
Ethernet: opens results
Start/stop function for realtime analyses (Line Scope / TDR)
Number block
-
-



Entry of numerals 0 through 9, letters and special characters
Direct function call, depending on the selected access (hot key), e.g.
page 98 et seq.

4 Quick-start guide
ARGUS 151 17
ARGUS is mainly controlled using the four cursor keys, the Enter key , the Back key
, the Level key and the three softkeys.
The bottom line of the display shows the current softkey assignments.
In the following pages of this manual, only the respective currently valid softkey function is
displayed in angle brackets < > , e.g. <Menu>. The softkey < > performs the same 
function as the Enter key , the softkey <>has the same effect as the cursor key on
the ARGUS keypad.
Softkeys
-



-
The function of the three softkeys depends on the respective situation.
The currently assigned function appears in the bottom line of the display
in the form of three blue fields with white letters, e.g.:
<Menu>: opens main menu
<Start>: establishes a connection or starts a test

Other softkeys are described in the corresponding chapters of this
manual.
Shift key
In some menus, a green "S" in a green circle appears in the top line of the
display.
In these menus, the softkeys are assigned two functions. The Shift key
toggles the softkey assignment (see example page 167).
Example:
Press Shift to change 
the softkey assignment.

4 Quick-start guide
18 ARGUS 151
Top connections
Bottom connections
PWR
For external power adapter.
When the external power adapter is connected,
ARGUS switches off the battery power supply.
ARGUS recharges the battery automatically once it
is switched off (see page 264).
USB-A or USB-A 1/2
USB-host interface 
(Active Probe II + Copper Box)
USB-B (mini-USB)
USB-client interface (PC connection)
Headset socket
ARGUS check regularly if there are any
USB devices connected.

Yellow Link/Data LED:
signals physical connection with another
Ethernet port
- LED steadily illuminated: 
connecting
- Flashing LED: transmitting/
receiving
Line
Access xDSL 
Access Copper
Pin assignment: 4/5
Pin assignment: 4/5
LAN
Connection to a PC network card.
Connection to the Ethernet interface of an xDSL
modem, router (IAD) or hub/switch or another
Ethernet interface (access: Ethernet).
The green Speed LED and yellow Link/
Data LED indicate transmission speed
- LED on: 10/100 Base-T
Green Speed LED indicates transmission
speed
- LED on: 10/100/1000 Base-T

4 Quick-start guide
ARGUS 151 19
Charging the battery in initial operation
The battery pack compartment is on the rear of the device. Attach the battery back by
placing it against the retaining points at the top end and then screwing down the knurled
screw. Use only the battery pack supplied with the device. Observe the safety information
given on page 11. Now connect your (switched-off) ARGUS to the external power supply
supplied with the device.
Switch on ARGUS using the key. The following display appears (you may first need to
acknowledge warnings or messages with <Continue>):

You must first change the battery pack supplied with the device completely (see page 264
Using the battery pack) before full capacity is reached.
Current assignment of the softkeys.
Press
ARGUS indicates in the display when
the battery is completely charged.
Press: ends charging.
The Accesses display can vary
depending on the configuration.
Selected
menu option
Menu name

4 Quick-start guide
20 ARGUS 151
Power-saving mode
In battery mode, ARGUS automatically switches off after five minutes of no activity
(interval adjustable, see page 259). ARGUS does not switch off during a test e.g.
(Loopbox) or in trace mode.
The device can alternatively be operated using the supplied external adapter. When the
adapter is connected, power supply via the battery is automatically switched off. ARGUS
must always be operated with the battery, regardless of the power supply type. This
ensures e.g. uninterrupted operation of the real-time clock.
Unplug the adapter from the mains as soon as ARGUS is switched off and
no longer in use (battery charging).