Vai alla pagina of
Un buon manuale d’uso
Le regole impongono al rivenditore l'obbligo di fornire all'acquirente, insieme alle merci, il manuale d’uso LevelOne WCS-2000. La mancanza del manuale d’uso o le informazioni errate fornite al consumatore sono la base di una denuncia in caso di inosservanza del dispositivo con il contratto. Secondo la legge, l’inclusione del manuale d’uso in una forma diversa da quella cartacea è permessa, che viene spesso utilizzato recentemente, includendo una forma grafica o elettronica LevelOne WCS-2000 o video didattici per gli utenti. La condizione è il suo carattere leggibile e comprensibile.
Che cosa è il manuale d’uso?
La parola deriva dal latino "instructio", cioè organizzare. Così, il manuale d’uso LevelOne WCS-2000 descrive le fasi del procedimento. Lo scopo del manuale d’uso è istruire, facilitare lo avviamento, l'uso di attrezzature o l’esecuzione di determinate azioni. Il manuale è una raccolta di informazioni sull'oggetto/servizio, un suggerimento.
Purtroppo, pochi utenti prendono il tempo di leggere il manuale d’uso, e un buono manuale non solo permette di conoscere una serie di funzionalità aggiuntive del dispositivo acquistato, ma anche evitare la maggioranza dei guasti.
Quindi cosa dovrebbe contenere il manuale perfetto?
Innanzitutto, il manuale d’uso LevelOne WCS-2000 dovrebbe contenere:
- informazioni sui dati tecnici del dispositivo LevelOne WCS-2000
- nome del fabbricante e anno di fabbricazione LevelOne WCS-2000
- istruzioni per l'uso, la regolazione e la manutenzione delle attrezzature LevelOne WCS-2000
- segnaletica di sicurezza e certificati che confermano la conformità con le norme pertinenti
Perché non leggiamo i manuali d’uso?
Generalmente questo è dovuto alla mancanza di tempo e certezza per quanto riguarda la funzionalità specifica delle attrezzature acquistate. Purtroppo, la connessione e l’avvio LevelOne WCS-2000 non sono sufficienti. Questo manuale contiene una serie di linee guida per funzionalità specifiche, la sicurezza, metodi di manutenzione (anche i mezzi che dovrebbero essere usati), eventuali difetti LevelOne WCS-2000 e modi per risolvere i problemi più comuni durante l'uso. Infine, il manuale contiene le coordinate del servizio LevelOne in assenza dell'efficacia delle soluzioni proposte. Attualmente, i manuali d’uso sotto forma di animazioni interessanti e video didattici che sono migliori che la brochure suscitano un interesse considerevole. Questo tipo di manuale permette all'utente di visualizzare tutto il video didattico senza saltare le specifiche e complicate descrizioni tecniche LevelOne WCS-2000, come nel caso della versione cartacea.
Perché leggere il manuale d’uso?
Prima di tutto, contiene la risposta sulla struttura, le possibilità del dispositivo LevelOne WCS-2000, l'uso di vari accessori ed una serie di informazioni per sfruttare totalmente tutte le caratteristiche e servizi.
Dopo l'acquisto di successo di attrezzature/dispositivo, prendere un momento per familiarizzare con tutte le parti del manuale d'uso LevelOne WCS-2000. Attualmente, sono preparati con cura e tradotti per essere comprensibili non solo per gli utenti, ma per svolgere la loro funzione di base di informazioni e di aiuto.
Sommario del manuale d’uso
-
Pagina 1
LevelOne FCS-1000 IP Network Camera WCS-2000 Wireless IP Network Camera User’s Manual VERSION 1.0[...]
-
Pagina 2
Table of Contents CHAPTER 1 INTR ODUCT ION.............................................................................................. 1 Overview ....................................................................................................................... ..... 1 Physical Details .........................................................[...]
-
Pagina 3
P/N: 9560GF01A0 Copyright 2003. All Rights Reserved. Docume nt Version: 1.0 All trademarks and trade names are the properties of their respective owners. ii[...]
-
Pagina 4
1 1 Chapter 1 Introduction This Chapter provides details of the LevelOne IP Network Camera's feat ures, components and capabilities. Overview The LevelOne IP Network Camera has an Integrated Microcomputer and a high quality CMOS digital-Image-Sensor, enabling it to display high quality live streaming video over your wired LAN, the Internet, an[...]
-
Pagina 5
• Suitable for Home, Business or Public Facilities . Whether for Home, Business or Public Facility surveillance, or just for entertainment and fun, the LevelOne IP Network Camera has the features y ou need. • Multi-Protocol Support. Supporti ng TCP/IP networking, SM TP (E-m ail), HTTP and other Inter net related prot ocols, the Level One IP Net[...]
-
Pagina 6
Physical Details Figure 2: LevelOne IP Network Camera Front-mounted LEDs Ready On - Power o n. Off - No power. Blinking - The Ready LED will blink during start up. This will take 15 to 20 seconds. Active Off - Idle. Blinking - LevelOne IP Network C amera is pr oviding a live vide o stream to at least one viewer. LAN On - LAN port is active. Off - L[...]
-
Pagina 7
Password settings will be set to their default values. • IP address: 192.1 68.0.99 • Administrator ID: adm inistrator • Administrator Password: null (n o password) Note : After this procedure is comp leted, all LEDs will blink three times to confirm that the re set was completed successfully. Package Contents The followin g items shoul d be i[...]
-
Pagina 8
5 2 Chapter 2 Basic Setup This Chapter provides det ails of installing and configuri ng the LevelOne IP Network Camera. System Requirements • To use the LAN interface, a st andard 10/100BaseT hub or switch and net work cable is required. • To use the Wir eless interface on the WCS-2000, ot her Wireless de vices must be com pliant with the IEEE8[...]
-
Pagina 9
For the WCS-2000, this disables the Wireless Interf ace, because only one interface can be activ e. The LAN interface is recommended for initial configuration. The default Wireless settings for the WCS -2000 are: Mode: Infrastructure Channel: 11 ESSID: w ireless WEP: Disabled 3. Adjust the Antenna On the WCS -2000, flip t he top-mou nted Antenna to[...]
-
Pagina 10
Setup Initial setup should be performed using the supplied Windo ws-based setup Wizard. Th is program can locate the LevelOne IP Network Camera even if its IP address is invalid for your network. Yo u can then co nfigure the Level One IP Netw ork Camera wit h appropriate TC P/IP settings for your LAN. Subsequent administ ration can be performed wi [...]
-
Pagina 11
4. Select the desired Camera from the list on the left. The current setting s for the selected Camera will be displayed in the table on the right. 5. Clic k Next to continue. 6. If t he Administrator ID and Password have been set, y ou will be prompted to enter them, as shown below. Enter the Administrator ID and Password set on the User screen. Fi[...]
-
Pagina 12
Figure 8: TCP/IP Set tings 9. Enter t he desir ed IP addres s values: • Enter an unused IP Address from within the address range used on your L AN. • The Subnet Mask and Default Gateway fields must match the values used by PCs on your LAN. • Click Next to continue. Figure 9: Camera Settings 10. This screen allows you to enter a suitab le Desc[...]
-
Pagina 13
Figure 10: Save Screen 11. This screen displays all details of the LevelOne IP Network C amera. Click Save if the settings are correct, or click Back to modify any incorrect values. 12. After clicking Save , you will see the screen below. You can click the Web UI button to connect to th e camera using your Web Bro w ser. Using the Web UI is require[...]
-
Pagina 14
11 3 Chapter 3 Setup for Viewing This Chapter provides informa tion about the optiona l settings and features fo r viewing video via the LevelOne IP Ne twork Camera. This Chapter is f or Administrators only. Introduction After finishin g setup via the Windows-base d Wizard, the LevelOne IP N etwork Camera can immediately be us ed by all users on yo[...]
-
Pagina 15
Figure 12: Image Screen 3. Make the requ ired adjustments, and save your chang es. 12[...]
-
Pagina 16
Controlling User Access to the Video Stream By default, al l users can conn ect to the LevelOne IP Network C amera and view l ive Video. If desired, you can limit access to known users, by requiring each user to login to the LevelOne IP Network Ca mera with t heir individ ual usernam e and password. To Enable this feature: 1. Connect to the Web-bas[...]
-
Pagina 17
Making Video available from the Internet If your LAN is connecte d to the Internet, t ypically by a Broadband Gateway/Router an d Broadband m odem, you ca n make the Leve lOne IP Net work Came ra available via the I nternet. LevelOne IP Network Camera Setup The LevelOne IP Networ k Camera configura tion does NOT ha ve be changed, unless: • You wi[...]
-
Pagina 18
Figure 15: DDNS Settings - Network Screen 3. Operation is then auto matic: • The LevelOne IP Network Camera will then automatically c ontact the DDNS server whenever it detects that the Internet IP a ddress has chan ged, and inform the DDNS server of the new IP address . • Interne t users can th en conn ect to your LA N using the Domain Nam e a[...]
-
Pagina 19
Viewing via the Internet Clients (viewers) will also need a broadband connection; dial-up connections are NOT recommended. Using the Windows Viewing/Recording Utility If using the Windows Viewing/Recording Utility, the details of the LevelOne IP Network Ca mera mu st b e en te red on the Internet tab of the Add Camera screen. Figure 17: Add Camera [...]
-
Pagina 20
Motion Detection/E-mail Alerts The Motion Detection feature will capture a short video and send it to your E-mail address when motion i s detected. The LevelOne IP Network Camera will compare consecutive frames to detect changes caused by the moveme nt of large objects. But the motion detector can also be triggered by: • Sudden cha nges in the le[...]
-
Pagina 21
18 4 Chapter 4 W eb-based Management This Chapter provides Setup details of the LevelOne IP Network C amera’s Web-based Interface. This C hapt er is for Administrat ors only. Introduction The LevelOne IP Network Cam era can be confi gured using your Web Browser. T he LevelOne IP Network Camera must have an IP addr ess which is compatible with you[...]
-
Pagina 22
Welcome Screen When you connect, the following screen will be displayed. Figure 19: Welcome Screen The menu options available from this screen are: • View Video - View live Vi deo using you r Web Browser. • Administration - Access the Adm inistration menu. • Exit - Terminate the connection to the LevelOne IP Network Camera. These options are [...]
-
Pagina 23
View Video Screen This screen is displayed when the View Video menu option is selected . Figure 20: View Video Screen • If using Internet Explo rer on Windows, you may see a prompt reg arding an "ActiveX control", like the exam ple below. You must allow this ActiveX control in order to view the Video. Click "Yes" . Figure 21 A[...]
-
Pagina 24
Administration Menu Clicki ng on Administration on the menu provides access to all the settings for the LevelOne IP Network Cam era. The Administration menu contains t he following options: • System - Description, Date & Time • Network - All network and W ireless settings • Image - Adjust the Video image • Users - Administrat or login, [...]
-
Pagina 25
NTP (Network Time Protocol) Time Server Enable or di sable the Tim e Server feature as requi red. If Enabled, the LevelOne IP Network Camera will contact a Network Time Server at regular intervals and update its internal timer. Server Address Enter the addr ess for the desired NTP serv er. Update Schedule The Schedule determ ines how often the Le v[...]
-
Pagina 26
Data - Network Screen IP Setting Obtain Address Automatically If selected, the LevelOne IP Network Cam era will obtain its IP address and related informat ion from a DHCP Serve r. Only select this option if your LAN has a DHCP Server. The fields below can the n be ignored. Fixed IP Address If selected, you m ust assign th e following val ues to the[...]
-
Pagina 27
Host Name Enter the host name (Dom ain Name ) allocated to you by the DDNS Server provid er. Account Enter the login name for the DDNS account. Password Enter the pass word for the D DNS account. Check WAN IP Schedule Set the schedul e for checking if the Internet IP address has changed. If the IP address has ch anged, the DDNS Server will be notif[...]
-
Pagina 28
WEP Screen (WCS-2000 only) This screen is accessed by clicking the Confi gure WEP button on th e Network screen. An example WEP screen is shown below. Figure 24: WEP Screen Data - WEP Screen WEP Encryption WEP Encryption Select th e option used on your Wireless LAN. • None - This is the default. If selected, data is NOT encrypted before being tra[...]
-
Pagina 29
The other key values are optional, and are used only for decrypting data. This all ows you to use different key s for transm itting and receiving, if required. When inputting a key valu e, follow these rules: • For 64 Bit Encryption, key s must be 10 c haracters. • For 128 Bit Encryption, keys must be 2 6 characters. • Keys must be e ntered i[...]
-
Pagina 30
Image Screen This screen is displayed when the Image menu opti on is clicked. Figure 25: Image Screen Data - Image Screen Video Settings Resolution Select the desir ed video resol uti on format. A larger size requires more bandwidth. Image Quality Select the desired image quali ty . Higher quality require s more bandwidth. Adjustment Exposure Selec[...]
-
Pagina 31
User Screen This screen is displayed when the User op tion on the Administration menu is clicked. Figure 26: User Screen Data - User Screen Admin Login Administrator ID Enter the name for t he Administrato r logi n. Spaces, punctuation, and special characters must NOT be use d in the name. When you connect to the LevelOne IP Network Camera, you wil[...]
-
Pagina 32
User Databa se User List This lists all users who currently exist. Use the Add , Delete , and Modify buttons to manage t his database. Alerts E-Mail Alert Enable the check box if you want to send an E-Mail Alert when motion is detected. Note: Motion detection can b e triggered by rapid changes in the available lighting, as well as by m oving object[...]
-
Pagina 33
Status Screen . Figure 28: Status Screen Data - Status Screen Status Device Name This is the default name for the LevelOne IP Network C amera, and cannot be changed. Description This displays t he description you ha ve entered. MAC Address The MAC address is the low-level network ad dress, also called the Network Adapter address or Physical Addres [...]
-
Pagina 34
Upgrade Firmware Screen This screen is displayed when you click th e Upgrade Firmware button on the Status screen. Figure 29: Upgrade Firmware Screen This screen allows you upgrad e the Firmware (software) in your LevelOne IP Network Camera. Before using this screen, your must down load the upgrade file to your PC. Then follow this proced ure: 1. C[...]
-
Pagina 35
32 5 Chapter 5 Viewing & Recording This Chapter describes how to view and record the l ive video stream generated by t he LevelOne IP Network Camer a. Overview The recomm ended method to view vide o is to use t he supplied Wi ndows Viewing/ Recording utility. Installation 1. Insert the supplied CD-ROM into your driv e. If the setup program do e[...]
-
Pagina 36
System Tray Icon When started, the program will create an icon in the Windows system tray on the taskbar, as shown below. Figure 31: System Tray Icon This Icon has the following functions: • Animation - If a recording is in progress, th is icon will be animated. Otherwise, it is stationary. • Hover - Hovering your mouse over this icon will gene[...]
-
Pagina 37
Cameras - Camera List • The Camera List displays all LevelOne IP N etwork Cam era you have defined. If y ou have not defined any cameras, this list will be empty. • Click the Add Cam era button to ad d a LevelOne IP Network Camera. See the following section for further details. • Once some cameras are listed, you can sele ct one and then use [...]
-
Pagina 38
Port Number This will normally display "80". Only change th is if requested to do so the LevelOne IP Net work Cam era Administrat or. Login The camera Administrator ca n require that users provide a username and password bef ore being allo wed to vie w the live vi deo. • If the Adm inistrator ha s not enable d this opti on, the Login fi[...]
-
Pagina 39
Login The camera Administrator ca n require that users provide a username and password bef ore being allo wed to vie w the live vi deo. • If the Adm inistrator ha s not enable d this opti on, the Login fields can be left blank. • Otherwise, you must enter th e username and password allocated to your by Ad ministrator. Modifying an Existing Came[...]
-
Pagina 40
Viewing Live Video To view live video, select a camera in the Camera List on the main screen, and click the View button. You will see a screen like the example below. Figure 36 Viewing Live Vid eo Controls are provided to stop and start viewing, and to start recor ding the vide o stream. Play Record . While recording, this button will be red. Stop [...]
-
Pagina 41
Recording Video You can rec ord Video whi le watching, or schedule reco rdings to occ ur when you are a bsent. Recordings are stored in a standa rd Microsoft A SF file form at, and can be play ed using Microsoft Media Player. Before doi ng any recor ding, you s hould revi ew the Recording Preferences to ensure they are suitable for your PC. Recordi[...]
-
Pagina 42
• To Stop a recording in progress, select it and click the Stop butto n. • To Start a Recording, click the Record button on th e View screen. Figure 39 Viewing Live Vid eo Record Button . While recording, this bu tton will be red. Recorded Files To view a list of all recorded files, click the Files button under the Recordings panel o n the main[...]
-
Pagina 43
Scheduled Recordings Recordings can be schedule d at any tim e, for any know n LevelOne IP Network Cam era. (Of course, your PC must be on at th e scheduled time.) To use this feature , click the Schedule button un der the Recordings panel on the m ain screen. You will see a screen like the example below. Figure 41: Scheduled Recording List This sc[...]
-
Pagina 44
Schedule Type Select the desir ed option: • One Time - Only one (1 ) recording is m ade, on the specified date, at the specified time. • Everyday - The recording is made eve ry day, at the specified time. The Start Day indicates when the first recording will be made. • Every Sunday, Every Mond ay, … - The recording is made on the specified [...]
-
Pagina 45
Viewing with your Web Browser The recomm ended method to view live vi deo from the LevelOne IP Network Ca mera is use t he Windows utility. However, you can also use your Web browser if necessary. Viewing over your LAN To establish a connection from your PC to the LevelOn e IP Network Camera: 1. Start your WEB browser. 2. In the Address box, enter [...]
-
Pagina 46
Figure 44: View Video in Br owser Video will start playing automatically. Th ere may be a delay of a few seconds while the Video stream is buffered . 43[...]
-
Pagina 47
Viewing via the Internet If LAN with the LevelOne IP Network Camera is connected to the Internet, and co nfigured correctly, you can connect to the Le velOne IP Networ k Camera via the Internet. See Making Video available from th e Internet in Chapter 3 for details of the required LAN configuration. To establish a connection from your PC to the Lev[...]
-
Pagina 48
6. Clic k View Video to see a screen like the example below. Figure 46: View Video in Br owser Video will start playing automatically. Th ere may be a delay of a few seconds while the Video stream is buffered . Note: You need a b roadband con nection to vie w video effecti vely; dial-up c onnections a re NOT recommended. 45[...]
-
Pagina 49
46 6 Chapter 6 T roubleshooting This chapter covers the most likely problems and their solutions . Overview This chapte r covers som e common p roblems that may be encountered while using the LevelOne IP N etwork Cam era and some possible soluti ons to them. If you follow t he suggested steps and the LevelOn e IP Network Camera still does not funct[...]
-
Pagina 50
indicates that the Administrator has restricted access to spe cified users. Ask the Adm inistrator for your User Name and Pass word. Problem 4 I can't connect to the Level One IP Network Camer a using a Wireless connection. Solution 4 Check that your PC and the LevelOne IP Network Camera h ave compatible Wireless settings. • Mode (Infrast ru[...]
-
Pagina 51
48 A Appendix A Specifications FCS-1000 Model FCS-1000 LevelOne IP Network Camera Dimensions 164 mm (L) * 88 mm (W)* 53.5 mm (H) 6.4 inch (L) * 3. 5 inch (W) * 2.1 inc h (H) Operating Temperature 0 ° C to 40 ° C Storage Temperature -10 ° C to 70 ° C Network Prot ocols: TCP/IP, DHCP, SMTP, NTP, HTTP Network Interface: 1 Ethernet10/100BaseT (R J4[...]
-
Pagina 52
FCC Statement This equipment has been tested and fou nd to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonab le protection against harmful interference in a resid ential installation. This equipm ent generate s, uses and can radiate radi o frequency ene rgy and, [...]
-
Pagina 53
Copyright Notice Many softwa re component s are covered by the GNU GPL (General Publ ic License). Som e are covered by other Licenses as listed in the t able below. Details of each applicable license are in cont ained in the following section. No Warranty THIS SOFTWARE IS PROVIDED B Y THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS [...]
-
Pagina 54
thttpd License Copyright 1995,1998, 1999,2000 by Jef Poskanze r <jef@acm e.com>. Al l rights reserve d. Redistribution and use in source and binary fo rms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyrigh t notice, this list of conditio[...]
-
Pagina 55
cgi-LIB Copyright Notice Author: Noel V Aguilar Version: 1.4 Filename: cgi-lib.h Program Li brary: CGI-LIB Feel free to use, co py, referen ce, or modify this program in any way . Support public domain freewar e. For updates or t o report bugs go to my home page http://www.geocities.com/SiliconValley/Vista/6493/ The web page for the library is: htt[...]
-
Pagina 56
GNU General Public License GNU GENERAL PUBL IC LICENSE Version 2, June 1991 Copyright (C ) 1989, 1991 Fre e Software Fou ndation, Inc. 59 Temple Place, Suite 330, Boston, M A 02111-1307 USA Everyone is permit ted to copy and distribute verbatim copi es of this licens e document, b ut changing it is not allowed. Preamble The licenses for most softwa[...]
-
Pagina 57
translated into another langua ge. (Hereinafter, translation is included without limitation in the term "m odification".) Eac h licensee is ad dressed as "yo u". Activities other than copyin g, distribution and m odification are no t covered by th is License; they are outside its scope. The act of running the Program is not rest[...]
-
Pagina 58
a) Accompany it with the complete corresponding machine-readable source code, which must be distribute d under the terms of Sectio ns 1 and 2 ab ove on a me dium customari ly used for software interc hange; or, b) Accompany it with a written offer, valid for at l east three years, to give any third party, for a charge no more than your co st of phy[...]
-
Pagina 59
directly or indirectly through you, then the only way you could satisfy both it and this License would be t o refrain enti rely from di stribution o f the Progra m. If any portion of this section is hel d in valid or unenforceabl e under any particular circumstance, the balance of t he section is in tende d to apply and the section as a whole is in[...]
-
Pagina 60
AND PERFORMANCE OF THE PROGRAM IS WITH YO U. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASS UME THE COST OF ALL NECESSARY SERVIC ING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLES S REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL AN Y COPYRIGHT HOLDER, OR AN Y OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIAB[...]
-
Pagina 61
Lesser GNU General Public License GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, Februar y 1999 Copyright (C) 1991, 1999 Free Softw are Foundation, Inc. 59 Temple Place, Suite 330, Boston, M A 02111-1307 USA Everyone is permitted to copy and distr ibute verbatim copies of this license document, but changing it is not allowed. [This is the first rel[...]
-
Pagina 62
a restrictive license from a patent holder. Therefore, we insist th at any patent license obtained for a version of the library must be consistent with the full freedom of use specified in this license. Most GNU software, including so me libraries, is covered by the ordinary GNU General Public License. This license, the GNU Lesser General Pu blic L[...]
-
Pagina 63
verbatim or with modifications and/or translated straightfo rwardly into another language. (Hereinafter, translation is included withou t limitation in the term "modification ".) "Source code" fo r a work means t he preferre d form of the work for m aking m odifications to i t. For a library, complete source code means all the s[...]
-
Pagina 64
In addition, mere aggregation of another work not based on the Librar y with the Library (or with a work based on the Li brary) on a volume of a storage or di stribution m edium does not bring the other wor k under the scope of this License. 3. You may opt to apply the terms of the ordinary GNU General Public License instead of this License to a gi[...]
-
Pagina 65
6. As an exception to the Sections above, you may also com bine or link a "w ork that uses the Library" wit h the Library t o produce a wor k containing p ortions of the Library, and distribute that work unde r terms of y our choice, pr ovided that the t erms permi t modification of the work for the custom er's own use and reverse e [...]
-
Pagina 66
8. You m ay not copy, m odify, subli cense, link wi th, or distr ibute the Libra ry except as expressly provided under this License. Any attempt oth erwise to copy, modify, sublicense, link with, or distribute the Library is void, and will automatically terminate your rights under this License. However, parties who have receive d copi es, or rights[...]
-
Pagina 67
and conditi ons either of t hat version or of any l ater version published by the Free So ftware Foundation. If th e Library does no t specify a license version number, y ou may choose any version ever published by the Free S oftware Foundat ion. 14. If you wi sh to inc orporate parts o f the Library i nto other free program s whose distri bution c[...]