Manuale d’uso / di manutenzione del prodotto TL-SC3171G del fabbricante TP-Link
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TL-SC3171G Wireless Day/Night Surveillance Camera REV : 1.0.0 1910010292.
COPYRIGHT & TRADEMARKS S pecifications are subject to change without notice. is a registered trademark of TP-LINK TECHNOLOGIES CO., L TD. Other brands and product names are trademarks or registered trademarks of t heir respective holders.
FCC ST A TEMENT This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These lim its are designed to pro-vide reasonabl e protection against harmful interference in a residential inst allation.
CONTENTS Package Co ntents............................................................................................................... .......... 1 Chapter 1 Mini mum System Requirement s ............................................................
6.3 Networ k ........................................................................................................................ 34 6.3.1 Informat ion ...............................................................................................
1 Package Content s The follow items should be found in your package: ¾ TL-SC3171G Wireless Day/Ni ght Surveillance Camera ¾ Power Adapter ¾ Mounting Bracket with three screws, a Lock Ring, a Brace.
2 Chapter 1 Minimum System Requirement s We strongly recommend your computers follow our minimum requirements in order to use this IP-Camera normally .
3 Chapter 2 Physical Overview 2.1 Front View Figure 2-1 Focus Adjustment Ring : Adjust the focus to get a clear image. Built-in Microphone : Built-in microphone for two-way audio. 2.2 Bottom view Figure 2-2 Wireless Antenna : For connection of IEEE 802.
4 then press and hold the Reset Button for at least 10 seconds. T he CPU of the camera starts to work completely 1 minute after you release the Reset button. I/O T erminal Connector : Input/Output to support External Alarm and Sensor used for motion detection, event triggering and alarm notification, etc.
5 Chapter 3 Using IP Camera via Web Browser 3.1 Obtain the IP Address 1. Insert the provided CD into your CD-ROM driver . The Setup Wizard will automatically pop up on your computer ’s screen as shown in the figure below . Figure 3-1 2. Choose the Intelligent IP Inst aller , and then the next screen appears.
6 Figure 3-2 3. After the inst allation is finished, click S tart > Program Files > T P-LINK >Intelligent IP Inst aller to start using the program. Figure 3-3 4. The following screen will then display . Click the Search button to search Net work Cameras in the network; it displays Network Came ras information including IP Address.
7 Figure 3-4 3.2 Windows Web Browser 1. Click Link to IE button in Figure 3-4 or launch your web br owser , and enter the IP address (obtain from Figure 3-4 Figure 3-4) of the IP came ra in the Location / Address field of your browse r . ) Note: 1) For the first time login wi th IE, you will need to enable “ Download signed ActiveX contro ls ”.
8 below . Figure 3-5 ) Note: The default User name “admin” and Password “a dmin” are set at the factory for the administrator . Y ou can change them in the A ccount Menu (Please check “ SETTING → BASIC → Security → Account ”). 3. The web-based managem ent page will display on y our screen.
9 3.3 Mac Web Browser 1. Click the Safari icon on the screen as the figure below s hown, and enter the IP address of the IP camera (which can be obt ained from Figure 3-4) in the Location / Address field of your browse r . ) Note: If you only want to view the video wit hout setting page, enter “http://<IP>/index2.
10 2. Enter the default User na me “admin” and passw ord “admin” in the dialog box as shown below . Figure 3-8 ) Note: The default Name “admin” and Password “admin” are set at the factory for the administrator . Y ou can change them in the Acc ount Menu (Pl ease check “ SETTING → BASIC → Security → Account ”).
11 3. The web-based manage ment page will be display on your screen. In the leftmost column of the web-based manage ment page are Setting , Client Setting , and Image Setup . For more details, you can refer to Section 5.2 , Section 5.3 and Section 5.4 .
12 Chapter 4 Using IP Camera via Mobile Phone Y ou can use TP-LINK W eb User Interface via mobile phones. T o use IP cameras via mobile phones, please make sure your R TSP is set to “On” (Default is “On”). T o change the settings of IP cameras, Please check “ Settings → Basic → Camera → General ”.
13 ) Note: Y ou can also use R TSP clients (RealPlayer , VLC, Qu ickT ime Player etc) to view RTSP streaming, just type in “rtsp://<IP>:<PORT>/video.3gp ” as the Player URL. Below is an example of viewing the came ra in 3G streaming mode on NOKIA N76: 1.
14 5. Open with Real-Player and click Ye s to connect. 4.2 3G Web Brower Mobile V iew Mode For 3G Web Browser Mobile V iew Mode, please type “http://<IP> ” into your 3G Mobile’s Web Browser . <IP> is the Public IP address of your IP camera (which can be obtained from Figure 3-4 Figure 3-4); For Example: rt sp://19 2.
15 3. Enter name and p assword. Default values are both admin. Then click Log in. 4. The TP-LINK User Interface and live image will show up in the middle of the screen. ) Note: It will show continuous snapshot s not a real time video streaming. T herefore, the recording feature is disabled.
16 4.3 2.5G W AP Browser Snap shot Mode For 2.5G W A P Browser Snap shot Mode, please type “<IP>/mobile.wml ” into your 2.5G W AP Browser . <IP> is the IP address of your IP camera, which can be obt ained from Figure 3-4. 4.4 2.5G Web Browser Snap shot Mode For 2.
17 3. Click Setting I and select protocol with TCP . 4. Click Setting II and select System Settings . 5. Click OK and connect to IP Camera..
18 T o use IP Camera via Opera Mobile with Window s Mobile Smart Phone, ple ase take the following steps: 1. Download the ” Opera Mobile 9.5.cab “ and copy to Windows Mobile 6 Smart Phone. 2. Click the “ Windows Explorer ” to find the download cab file.
19 5. T ype IP or http url link. 6. T ype the username and password or setup authentic ation off in Setting > Basic > Security > Account ..
20 Chapter 5 Configuration of Main Menu You would find that the illustra tive web pages in this Manual ar e all orange. Please note that they're from our latest firmware, which can be downloaded from our website. Web pa ges in our previous firmware are blue.
21 5.1.1 Zoom in/out the image vi a the monitor window z Click to display the digit al zoom in window . z Pull to adjust the digit al zoom range, and it will be showed on the above windo w . z Y ou can use the left click of your mouse to move the to any where on the window to view the desired detail more clearly .
22 Microphone turned on mean you can broadcast to the connected IP camera(s) via the Ethernet using your microphone Microphone turned off V olume control bar 5.2 Setting This function is only for the Ad ministrator . Click this button to get into the Basic and Advance settings menus.
23 5.3 Client Setting This function is only for the client. Click this button to configure the se ttings of IP Camera, which includes Mode , View siz e , Protocol , and Video buffe r . 5.3.1 Mode Click the drop-down list to choose MPEG4 , MJPEG and JPEG video compression mode.
24 5.3.3 Protocol Select the transferring protocol from TCP , UDP , HTTP and Multicast . ) Note: This item appears only when RSTP mode is enabled (selecting SETT ING → BASIC → Camera → General ). 5.3.4 V ideo Buffer T urn the Video Buf fer function ON / OFF .
25 5.4.2 Contrast The contrast is a measure of a display system, defined as the ratio of white to bla ck that the system is cap able of prod ucing. The higher value the contrast is, the more delicate color you can get.
26 Chapter 6 Setting-BASIC Click BASIC to display the submenus including System , Camera , Network , and Security . 6.1 System Click Sy stem to display the submenus including Information , Date/Time , and Initialize .
27 6.1.2 Date/T ime The Date/Time p age displays all options of time setting. ¾ Current date/time : Displays the current date and time of this IP Camera. ¾ PC clock : Displays the date and time of the monitoring PC clock. ¾ Date/time format : Y ou can click the drop-down list to sele ct dif ferent time display formats.
28 synchronize the date and time of this IP Came ra with those of the time server , known as the NTP server . ) Note: The NTP server (Network T ime Protocol) is the time server which is an Internet standard protocol built on the top of TCP / IP .
29 turn off the IP Camera power or disconnect the network until the upg rading is completed. ¾ Upload language p ack : Upgrade the device lang uage pack. Click Browse… and select the file for upgrading. A confir mation dialogue will appear . Click OK to start upgrading.
30 ¾ RTSP : Switch On or Of f. z RTSP Port : S pecify the transmission port number of RTSP streaming. The default value is 554. z Port Range : S pecify the transmission port range of RTP streaming video. RTP will select a port randomly from this range.
31 ¾ Vie w er Authentication: If the viewer authentication is On , the users will be requested to type in username and password when viewing through RTSP . ¾ Multicast Streaming (If it is ON) z Multicast address : S pecify the multicast server address.
32 B. Mobile Vie w If RTSP is On (see Setting → Basic → Camera → General), the screen will display as shown below . ¾ Vie w er Authentication: If the viewer authentication is On , the users will be requested to type in username and password when viewing through RTSP .
33 even number from 1024 to 65534. It is set to 10000 and 1 1000 b y default. z Time-T o-Live : Set the maximum TTL(T ransistor-T ransis tor Logic) that mu lticast can pass through. ¾ Image Size : The image size of Mobile View is fixed at 160 x 120. ¾ Frame Rate : Set the frame rate of the MPEG4 image.
34 If RTSP is Off (see Setting → Basic → Camera → General), the screen will display as shown below . ¾ Image Size : S pecify the image size when the netwo rk camera transmits. Y ou can choose among 640 x 480, 320 x 240, and 160 x 120. ¾ Frame Rate : Set the frame rate of the MJPEG image.
35 6.3.1 Information The p age of Information displays the MAC address of the device. ¾ Obt ain an IP address automatically (DHCP) : (If a DHCP server is installed on the network) Select this, the IP will be assigned by the DHCP server . ¾ Obt ain DNS server address au tomatically : Select this to obt ain the address of DNS server automatically .
36 ¾ Use the following IP address : Select this when the fixed IP address is set. z IP address : Enter the IP address of the device. z Subnet mask : Enter the subnet mask. z Default gatew ay : Enter the default gateway . ¾ Use the following DNS server address : Select this when you set the fixed IP address as the IP address o f DNS server .
37 6.3.2 PPPoE (Point-to-Point Protocol over Ethernet) If your ISP provides Dynamic IP with authentic ation by username and password, enter all PPPoE information in this part. When you use the PPPo E function, you need to tu rn on the DDNS or IP Notification function at the same time.
38 ¾ Use the following DNS server address : Select this when you set the fixed IP address as the IP address o f DNS server . z Primary DNS server : Enter the IP address of the primary DNS server . z Secondary DNS serve r: Enter the IP address of the secondary DNS server .
39 6.3.3 DDNS (Dynamic DNS) Choose menu “ Dynamic DNS ”, you can configure the Dynamic DNS function. The IP Camera offers the DDNS (Dynamic Domain Name System ) feature, which allows the hosting o.
40 2. Input all information and fo llow step by step with DynDNS. . 3. Log in with new account and click Account → My Hos ts → Add Host Services ..
41 4. Type domain in the Hostname field and select sub-domain. 5. After typing in information, check your DDNS service..
42 6. Type your DDNS User ID , Password and Host name in Setting → Basic → Netw ork → DDNS . After completing setting, reboot IP Camera. 6.3.4 UPnP (Universal Plug and Play) Choose menu “ Network → UPnP ”, and you can view the information about UPnP (Universal Plug and Play) in the screen as shown in the following figure.
43 ¾ HTTP port : Enter the HTTP port number and the default HTTP port is 80. ¾ SSL port : Enter the SSL port number and the default SSL port is 443. ¾ MPEG4 RTSP port : Enter the MPEG4 RTSP port, default value is 554. ) Note: UPnP (Universal Plug a nd Play) : UPnP is a set of computer netwo rk protocol.
44 ¾ Device Name : Enter Device Name to your needs. ) Note: How to use Bonjour in your Windows Browser UI? Please check the link below: http://www .apple.com/support/downloads/bonjourforwindows.html 6.3.6 IP Notification When network notify type is set to “ON”, you can send an e-mail notification of the completion of the network setting.
45 ¾ Notify T ype : Y ou can select the notify ty pe among DHCP , S tatic IP , and PPPoE. ¾ SMTP Server Name : T ype the SMTP server name up to 64 characters, or the IP address of the SMTP se rver . ¾ SMTP Server Port : Y ou can set port number from 1~65535 according to your mail server .
46 z User name, Password : T ype the user name and Password of the user who has the mail account. This setting is necessary when the SMTP server which sends e-mails performs authentication. ¾ Recipient e-mail address : T ype the recipient e-Mail address.
47 The wireless network has to be set up by using c able network connection. Af ter setting the camera correctly , the wireless function can work wit hout cable network connec tion. Please follow the setting process below step by step: 1. Connect IP Camera with Ethernet connection.
48 6. Choose the option of Obt ain an IP address automatically (DHCP) or Use the following IP address:.
49 ¾ Use the following IP address : Select this when the fixed IP address is set. z IP address: Enter the IP address of the device. z Subnet mask: Enter the subnet mask. z Default gateway: Enter the default gateway . ¾ Use the following DNS server address : Select this when you set the fixed address as the IP address of DNS server .
50 ¾ Messenger : Check the radio button before On , so you can use your IP Camera via this function. ¾ Protocol : Displays the protocol used. ¾ Login Account : Enter the MSN account registered for you IP Camera. ¾ Password : Enter the password of the MSN acco unt.
51 A. Configuring your IP camera ) Note: If you use a Modem Router to access the Internet, you should set your IP Camera as the virtual server with port range 20000-210 00 on the M odem Router’s web-based management page. 1. Click “ BASIC->Network->Messenger ” to enter the “Messenge r” page.
52 B. Add the camera’s msn account 1. Make sure the desired computer with MSN installed. Log into the MSN. 2. Make sure the MSN view plugin is installed. This plugin is embedded in IntelligentIPInst allerSetup(TPLink)-1.1 .16.09.exe and will be installed automatically when you inst all Inte lligentIPInstallerSetup(TP Link)-1.
53 5. Check its st atus. Normally it should be online. 6. Click the camera icon and select Vie w a cont act’ s webcam to view the vi deo..
54 7. W ait for a moment, and you will see the video capt ured by your IP Camera. 6.4 Security Click Security to display the submenus including Account and HTTPS .
55 6.4.1 Account The device default account and password setting is “admin / admin”. That means everyone who knows IP address can access the device including all configuration. Therefore, it is nece ssary to assign a password if the device is intended to be accessed by others.
56 z The Operator mode can not only view the Live View but also control the PTZ (apply in speed dome). z The Viewer mode only can view the Live View . ¾ Vie w er Authentication : Allows all viewers direct ly access to Live V iew . 6.4.2 HTTPS HTTPS is a URL scheme used to indicate a secure HTTP connection.
57 ) Note: 1) When enable HTTPS with RTSP on mode, the IP Camera o nly protect the setting such as username and password and do not protect video and audio. 2) When enable HTTPS with RTSP off mode, the IP Camera will protect all setting including video and audio.
58 Chapter 7 Setting-Advance Click Advance to display the submenus including FTP client , SMTP , HTTP event , Alar m output , Schedule , Alarm input , Motion detection and System Log . 7.1 FTP client Use this menu to set up for capturing and sending images to an FTP server .
59 7.1.1 General Select On when you use FTP function. The FTP client setting page will appear . Select Off when you do not wish to use the FTP client function. ) Note: The frame rate and operability on the main viewer may decrease while a file is being transmitted by the FTP client function.
60 ¾ Remote Path : T ype the path to the destination in FTP server up to 64 characters. ¾ Image File Name : T ype the file name you want to a ssign to the images when sending to the FTP server . Y ou can use up to 10 alphanumeric characters, - (hyphen) and _ (underscore) for naming.
61 ) Note: 1) Y ou can set motion detection on motion detection p age (Please go to “ Setting → Advance → Motion detection → Setting ”). For more details, you can check Section 7.7 . 2) Motion Detection works only when the MPEG4 function is On and the Cropping is set to Off.
62 ) Note: Y ou can set the alarm input function at Alarm Input p age. (Please go “ Setting → Advance → Alarm Input → Setting ”). For more details, you can check Section 7.6 . ¾ Effective period : Set the period when the periodical sending is effective.
63 ¾ Image file name : T ype the file name of the image s ent by SMTP up to 10 alphanumeric characters, - (hyphen) and _ (under score). ¾ Suffix : Select a suf fix to be added to the file name sent by SMTP . z None : The name of the sent file will b e the Image file name.
64 ) Note: Y ou can set schedule function on Schedule p age . (Please go to “ Setting → Advance → Schedule → Setting ”) For more details, you can check Section 7.
65 The Setting of General will be the same as the se tting of IP Notification (Ple ase check “ SETTING → BASIC → Network → IP Notification ”). ¾ SMTP server name : T ype the SMTP server name up to 64 characters, or the IP address of the SMTP se rver .
66 ¾ SMTP : Select it if SMTP authentication is necessary when an e-mail is sent. ¾ POP before SMTP : Sele ct if POP before SMTP authentic ation is necessary when an e-mail is sent. ) Note: When you set to On, be sure to select either or both SMTP or / and POP before SMTP .
67 7.2.2 Alarm sending Set to send the mail with connection to the alarm det ection by the external s ensor input or by the built-in motion detection function. Select On to send the image and file to SMTP server linked with the alarm detection. ¾ Alarm sending : Select On to set to send mail with c onnection to the alarm detection.
68 ¾ Alarm z Motion Detection : Click it for using Motion Detection function as a sensor . Y ou can set motion detection function on the motion detection page.
69 ) Note: 1) Y ou can set motion detection on motion detection page (Please go to “ Setting → Advance → Motion detection → Setting ”). For more details, you can check Section 7.7 . 2) Motion Detection works only when the MPEG4 functi on is On and the Cropping is set to Off.
70 ) Note: Y ou can set the alarm input functi on at alarm input page (Please go “ Setting → Advance → Alarm input → Setting ”). For more details, you can check Section 7.6 . ¾ Effective period : Set the period when the periodical sending is effective.
71 ¾ Image file name : T ype the file name of the image s ent by SMTP up to 10 alphanumeric characters, - (hyphen) and _ (under score). ¾ Suffix : Select a suf fix to be added to the file name sent by SMTP . z None : The name of the sent file will b e the Image file name.
72 ) Note: Y ou can set schedule function on Schedule p age (Please go to “ Setting → Advance → Schedule → Setting ”). For more details, you can check Section 7.5 . 7.3 HTTP event Use this menu to set up for capturing and sendi ng images to an HTTP server .
73 7.3.1 General ¾ HTTP even t: Set up the HTTP server URL, por t, User ID, Password, and Proxy Server settings. For example: URL: 192.168.1.7/cgi-bin/operator/ptzset ) Note: The setting of URL should be the same as CGI. 7.3.2 Alarm sending Set to send the mail with connection to the alarm detection by the built-in motion detection function.
74 Alarm sending : Select On to set to send command with c onnection to the alarm detection. ¾ Alarm z Motion detection : Click it for using Motion Detection function as a s ensor . Y ou can set motion detection function on the motion detection function page.
75 ) Note: 1. Y ou can set motion detection on motion detection p age (Please go to “ Setting → Advance → Motion detection → Setting ”). For more details, you can check Section 7.7 . 2. Motion Detection works only when the MPEG4 function is On and the Cropping is set to Off.
76 ) Note: Y ou can set the alarm input functi on at alarm input page (Please go “ Setting → Advance → Alarm input → Setting ”). For more details, you can check Section 8.6 . ¾ Effective period : Set the period when the periodical sending is effective.
77 7.4.1 Setting Alarm output : To activate the Alarm output function, select On . When you do not use the Alarm output function, select Off . ¾ Digital output : Select High signal output and Low signal output as your alarm. ¾ Trigger condition : Select the mode of the Alarm ou tput function .
78 ) Note: 1. Y ou can set motion detection on motion detection p age (Please go to “ Setting → Advance → Motion detection → Setting ”). For more details, you can check Section 7.7 . 2. Motion Detection works only when the MPEG4 functi on is On and the Cropping is set to Off.
79 ) Note: Y ou can set the alarm input function at alarm input p age (Please go “ Setting → Advance → Alarm input → Setting ”). For more details, you can check Section 7.6 . ¾ Alarm duration : There are up to 60 second options to choose for alarm duration interval.
80 This is the same menu as the setting menu which is displayed when yo u click Schedule to set Effective period and Schedule in FTP client setting menu, e- Mail (SMTP) setting menu, HTTP Event setting menu and so on. Example: When setting e-Mail (SMT P) (the alarm sending) in the Schedule setting menu.
81 set to Mon (Monday) are applied to all days. In this case, the S tart time and End time of the other days than Mon (M onday) cannot be input. 7.6 Alarm input When you click Alarm Input on the Advance mode menu, the Alarm input setting menu appears.
82 7.7 Motion detection There are three Motion Detection functions as s ensors to set for different detecting zones. Each one has Threshold and Sensitivit y inputs which you can adjust to specific zone sequentially . Motion Detection function can support to FTP , SMTP and Alarm output for capturing and sending images or starting alarm output.
83 7.7.1 Setting ¾ Threshold : It means the extent whic h the alarm will be triggered. ¾ Sensitivity : It means that how of ten the sensor will sc an the image. The higher sensitivity it is and the more frequently it scans. z Motion Detection 1 : Click it for using Motion Detection 1 function as a sensor .
84 7.8.1 Setting ¾ Enable remote log : Enables user to send the log data to a specified log server . ) Note: There is a function called W atc hdog which can automatic ally detect error s and restart the IP camera while mpeg, mjepg, 3gpp, or web cannot work.
85 Appendix APPENDIX a – FRAME RA TE & BIT RA TE T ABLE This chapter provides tables that help you to optimize your IP camera with your network environment.
86 320*240 512 30 550 30 320*240 512 15 600 16 160*120 1024 30 950 30 160*120 1024 15 750 16 160*120 512 30 500 30 160*120 512 15 50 16 160*120 128 30 130 30 160*120 128 15 140 16 A.3 MJPEG @ 15f ps / kbp s Quality 640*480 320*240 160*120 Excellent 4000 1500 600 Detailed 2400 900 400 Good 1600 650 300 S tandard 1300 500 240 Medium 900 350 170 A.
87 320*240 Good 5 260 5 320*240 Medium 15 350 13 160*120 Medium 5 130 5 160*120 Excellent 15 600 13 160*120 Excellent 5 230 5 160*120 Good 15 300 13 160*120 Good 5 1 15 5 160*120 Medium 15 170 13 160*120 Medium 5 65 5 APPENDIX b – STORAGE REQUIREMENT T ABLE This chapter provides tables that help you set your recording storage system.
88 B.3 MPEG4 St orage Requirement GB / channel / day Image-Size Bitrate Setting Frame-Rate Setting Current Bitrate 640*480 2048 30 23.0 640*480 2048 15 22.2 640*480 1536 30 18.5 640*480 1536 15 17.9 640*480 1024 30 10.5 640*480 1024 15 10.5 640*480 512 30 5.
89 FA Q Q1. What can I do if I forgot the login name and p assword? Press and hold the Reset button on the bottom panel with a p in or paperclip. Please continue holding down the Reset button for approximately 15 seconds. And t hen IP Camera will reboot.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il TP-Link TL-SC3171G è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del TP-Link TL-SC3171G - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso TP-Link TL-SC3171G imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul TP-Link TL-SC3171G ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il TP-Link TL-SC3171G, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del TP-Link TL-SC3171G.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il TP-Link TL-SC3171G. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo TP-Link TL-SC3171G insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
