VIRDI AC-2200 User Manual Download Page 10

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AC-2200 User Guide

Union Community / (138-050) 5

Fl., Hyundai Topics Building, 44-3, Bangi-dong, Songpa-

gu, Seoul, Korea // Tel : 82-2-6488-3000 , Fax : 82-2-6488-3099
E-mail: [email protected]; http://www.unioncomm.co.kr

When authentication fails

When fingerprint input fails

If your finger is released too early before your fingerprint is
entered

When an unregistered card is entered

When 1:N Authentication is attempted under the condition that
authentication priority is SN and there is no user who has been
allowed for 1:N Authentication

When anti-passback is in error

When the server cannot handle too many authentication requests
from the terminal

Summary of Contents for AC-2200

Page 2: ...0 00 1 01 2015 10 18 Form Change 10 61 00 000 02 1 02 2015 12 28 Modify Display 10 61 00 000 09 1 03 2015 01 18 Error Correction Add Default Setting Add LFD Setting Add UDL Setting 1x 61 00 000 12 Version Change 1 04 2016 01 26 Modify SN related Information 1x 61 00 000 14 1 05 2016 01 29 Modify Misspelling 1x 61 00 000 15 1 06 2016 02 05 Modify Misspelling 1x 61 00 000 16 1 07 2016 03 07 Add a re...

Page 3: ...ared This is called One to One Authentication 1 N Authentication The user is identified only by the fingerprint The same fingerprint as the input fingerprint is identified among the registered fingerprints without User ID or Card entered This is called One to N Identification Authentication Level As a level used for fingerprint authentication it is displayed in Step 1 to 9 Authentication cannot be...

Page 4: ...1 7 Buzzer guide announced during operation 13 1 8 How to register and enter correct fingerprint 13 2 Product Description 15 2 1 Product Features 15 2 2 Configuration Diagram 17 2 2 1 Standalone Use Access 17 2 2 2 Connecting the PC server access T A food service control 17 2 3 Product Specification 18 3 Environment Setting 19 3 1 Checkpoints before environment setting 19 3 1 1 Enter the menu 19 3...

Page 5: ...inal Lock Setting 54 3 7 2 Card Number Inquiry 55 3 7 3 Monitor Input Port Setting 55 3 7 4 Duress FP Setting 57 3 8 Device Setting 58 3 8 1 System Configuration 58 3 8 2 Card Reader Format Setting 59 3 8 3 Fingerprint Sensor Setting 59 3 8 4 Wiegand Speaker Output 61 3 8 5 Terminal Initialization 63 3 8 6 External Device Setting 65 4 How to Use Terminal 68 4 1 When operating to 1 Access 68 4 1 1 ...

Page 6: ...l in a place exposed to direct sunlight Otherwise it may cause malfunction deformation and discoloration Do not install the terminal in humid or dusty places Otherwise it may cause malfunction Do not clean this terminal by sprinkling water nor wipe it with benzene thinner and alcohol Otherwise it may cause electric shock or a fire Keep the terminal away from magnets Otherwise it may cause failure ...

Page 7: ... Guide 7 Union Community 138 050 5th Fl Hyundai Topics Building 44 3 Bangi dong Songpa gu Seoul Korea Tel 82 2 6488 3000 Fax 82 2 6488 3099 E mail sales unioncomm co kr http www unioncomm co kr 1 2 Product Details ...

Page 8: ... F4 Switch to Return mode from the default screen Pressing it again in the Return mode is changed to Access mode Used to enter ENT or move right in the menu mode When pressing for more than two seconds this is used to ENT button F4 1 4 ViRDI logo LED signals displayed during operation ViRDI Power Blue On Normal Flickering Under Bluetooth communication ViRDI Door Green On Door Open Off Door Close V...

Page 9: ...omm co kr 1 5 1 Icon Information Fire Detection A fire is detected by the fire detection sensor Door Status The door is open Server Connection Status The LAN cable is not connected Only Link is connected USB Connection The USB is connected USB port is service port 1 5 2 Message Information The default screen of AC2200 The fingerprint is being input or on standby When authentication is successful ...

Page 10: ...ication fails When fingerprint input fails If your finger is released too early before your fingerprint is entered When an unregistered card is entered When 1 N Authentication is attempted under the condition that authentication priority is SN and there is no user who has been allowed for 1 N Authentication When anti passback is in error When the server cannot handle too many authentication reques...

Page 11: ...od service control and users attempt more than two times authentication in the same food time zone When there is no response from the server during authentication attempt When the network is disconnected during authentication attempt to the server The card input is on standby When the card is registered but its authentication is attempted in the access control time When you wait for a response aft...

Page 12: ...ngpa gu Seoul Korea Tel 82 2 6488 3000 Fax 82 2 6488 3099 E mail sales unioncomm co kr http www unioncomm co kr When the terminal is locked When the food service control is set in the non meal time When the terminal program is upgraded Do not power off the terminal when this message is displayed ...

Page 13: ...cation fails or the user s input is wrong Ppiriririk When input standby When it is notified that fingerprint input is on standby Ppiririk When success If authentication is successful or if the current user finishes settings 1 8 How to register and enter correct fingerprint Correct fingerprint input method Enter your fingerprint as if you take a thumbprint by using your forefinger if possible The f...

Page 14: ...amaged or unclear fingerprints They should be registered using a password If your hands are dry you can blow your breath on the system to operate it more smoothly For children too small or unclear fingerprints may be difficult or impossible to use They need to register a new fingerprint every six months For seniors the fingerprint with too many lines may not be registered It is recommended that yo...

Page 15: ...the LCD display for each operation to receive certification so that you can easily input In particular thanks to a built in backlight for the LCD display you can easily identify the screen and operate keys in the dark room The voice is stored in the memory and it can be changed to a desired voice from the server Diverse and flexible access control function Easy to use it without the risk of rental...

Page 16: ...fore registering users or administrators you should determine how to register and authenticate FP Fingerprint Registration Fingerprint Authentication Card Card Registration Card Authentication M Key Mobile Key Registration Mobile Key Authentication Card or FP Card or Fingerprint Registration Card or Fingerprint Registration Card and FP Card and Fingerprint Registration Card Authentication and then...

Page 17: ...Configuration Diagram 2 2 1 Standalone Use Access 2 2 2 Connecting the PC server access T A food service control DC12V Adapter All models Lock Lock Monitor TCP IP Internet WAN LAN TCP IP TCP IP TCP IP TCP IP TCP IP Food Service Control Program Attendance Control Program Fingerprint Authentication Server Static IP UDB Sever Database MDB or MSSQL Remote Administrator Program User and Terminal Settin...

Page 18: ...0 Log 10 000 Picture Fingerprint Sensor Optical Authentication Speed Less than 1 second Scan Area Resolution 14 8 17 9mm 500 DPI FRR FAR 0 1 0 0001 Communication Port TCP IP Authentication Server Communication Bluetooth Mobile Interlocking RS 485 External Device Communication Wiegand In Out Card Reader or External Device Communication Temperature Humidity 20 50 Lower than 90 RH LCD 1 77 Color LCD ...

Page 19: ...on screen will be displayed The administrator is verified by either card or fingerprint depending on the authentication method Upon successful authentication the screen goes to the following menu Select the menu you want to change using F1 and F2 buttons and press ENT F4 button to go to the submenu The description of function buttons such as F1 F2 F3 and F4 is in numerical order on the bottom of t...

Page 20: ...menu press ESC button for more than 2 seconds If only buttons are displayed except ESC and ENT buttons ESC is enabled by pressing F3 for more than 2 seconds and ENT by pressing F4 for more than 2 seconds 3 1 3 Save after completion of environment setting After changing settings press ESC button on the main menu screen to save the changes and the following screen will be displayed Select Yes button...

Page 21: ...Terminal ID Auth Mode NS SN NO SO 2 Terminal Net Net Type Terminal IP Subnet Mask Gateway 3 Server Net Server Type Server IP Server Port 3 Option 1 Application WorkMode 1 Access 2 T A 3 Cafeteria When setting to Access or T A Start Time Leave Time F3 Time F4 Time Access Time Multi Fn Key When setting to Cafeteria Breakfast Lunch Dinner Supper Snack No Limit 2 Verify Show User Only Card Use TOC Blo...

Page 22: ...ion Terminal Id Terminal ID Net Type Network connection methods Static IP DHCP Terminal IP Terminal IP address Gateway Terminal gateway address Subnet Mask Terminal subnet mask address Server Type Network server connection mode setting Server IP IP address of the network server connected to the terminal Server Port Port number of the network server program MAC Address Terminal MAC address Card Ver...

Page 23: ... results that can be saved in the terminal Serial Num Serial number notation 5 Ext Function 1 Lock Term Lock Term 2 Read Card Read Card 3 Monitor Monitor 1 Monitor 2 4 Duress FP Duress FP 6 Device 1 System Conf ID Length Language 2 Card Format Card Reader Card Format 3 FP Sensor 1 1 Level 1 n Level Check Same FP 4 Wiegand Wiegand Out 5 Initialize Init Config Delete Log Init Terminal DB Backup 6 Ex...

Page 24: ...e following screen will appear Enter the ID of the new user you wish to register and press F4 button long When registering the available user ID is automatically displayed on the LCD so that you can register it conveniently If necessary you can change the ID using function keys If other user has been already registered in the entered ID the message of Duplicated User ID with Fail buzzer is display...

Page 25: ...ed user If this value is set to 1 the 1 1 Level set in the terminal is used instead of the user specific authentication level After completion of setting press the ENT button to move to the next setting Enter your fingerprint referring to 1 8 How to register and enter the fingerprint as aforesaid When the fingerprint sensor lights on place your finger on the fingerprint input window When Ppik buzz...

Page 26: ... Duplicated FP If the fingerprint registered already is registered again If registration fails even if you try to repeat 2 3 times depending on the correct fingerprint registration method it is recommended to authenticate using the card 3 3 1 2 Register as 2 FP Register and authenticate using the card only Place the card to register on the LCD To cancel and exit the registration press ESC button W...

Page 27: ...user you wish to delete and press F4 button long Enter the ID of the user you want to delete from the registered users of the terminal and press F4 button long the successful buzzer will sound and all the information will be deleted from the terminal However data deletion from the terminal does not mean data deletion from the server To delete the data permanently it must be deleted from the server...

Page 28: ...entered the message of Unregister with Fail buzzer is displayed on the LCD and then the screen goes to the 1 User menu The changeable items of users are different according to the user authentication method and are classified as below Select 1 to change the authentication method 2 to modify the authentication level 3 to add the fingerprint to the relevant ID and 4 to add the card Up to 10 fingerpr...

Page 29: ...erprint as aforesaid When the fingerprint sensor lights on place your finger on the fingerprint input window When Ppik buzzer occurs wait for about 2 3 seconds until the light turns off and lift your finger When the first fingerprint is successfully entered the message of Please try again is displayed Enter the fingerprint entered just now once again Enter the fingerprint entered just now once aga...

Page 30: ... If the fingerprint registered already is registered again User FP Full If ten fingerprints have been registered in the relevant ID 4 When selecting Add CARD To cancel the registration press ESC button When placing your card on the LCD the successful buzzer occurs and the newly entered card number is added If card change fails the Fail buzzer occurs and the screen returns to the 3 Modify menu The ...

Page 31: ...on process Only users registered as administrators have the authority to change the operating environment of the terminal and register modify delete all the information of users saved in the terminal Therefore special attention is required for registration of terminal administrators 3 3 5 Delete All Users Select F3 1 User 5 Delete All on the main screen and the following screen will appear Select ...

Page 32: ... to change and press ENT button 3 4 1 Terminal ID Select F3 2 Network 1 Terminal ID on the main screen and the following screen will appear 3 4 1 1 Terminal ID This ID is a unique ID used to allow the server to identify the terminal The default is 00000001 Default Setting 00000001 This ID must match the door ID set to the server program and is entered as an 8 digit number Press ENT button long and...

Page 33: ...er if the entered user is not registered in the terminal authentication is attempted from the server If there is any fingerprint user in the terminal the 1 N fingerprint authentication is not performed in the server NO Even if the user is registered in the terminal server authentication is performed through the server only SO Only users registered in the terminal are authenticated If the terminal ...

Page 34: ...m the connected network and select 2 when using the IP assigned from the DHCP server which exists in the connected network After entering correctly press ENT button to move to the next setting If the connection method is set to Static IP 1 the following procedures such as 3 4 2 2 Terminal IP Setting 3 4 2 3 Subnet Mask Setting and 3 4 2 4 Gateway Setting should be set respectively However if the c...

Page 35: ...is is to set the subnet mask of the network connected to the terminal After entering correctly press F4 button long to move to the next setting 3 4 2 4 Gateway Setting Press buttons to move to the digit you want to change and press buttons to change the numbers Default Setting 192 168 000 001 This is to set the gateway IP of the network connected to the terminal After entering correctly press ENT ...

Page 36: ... assigned from the DDNS server After entering correctly press ENT button to move to the next setting If the connection method is set to Static IP 1 the following procedures such as 3 4 3 2 Sever IP Setting and 3 4 3 3 Server Port Setting should be set respectively However if the connection method is set to 2 DDNS DDNS ID needs to be additionally set and so 4 4 3 4 DDNS ID Setting is added 3 4 3 2 ...

Page 37: ...etting 09870 This is to specify the Port of the network server connected to the terminal After entering correctly press F4 button long and the screen will go to the upper menu 3 4 3 4 DDNS ID Setting Press buttons to move to the digit you want to change and press buttons to change the numbers Default Setting 000000001 This appears only when the server connection method is set to DDNS 2 This is to ...

Page 38: ...ange the numbers Default Setting 210 116 104 058 This is to specify the IP Address of the network server connected to the terminal After entering correctly press F4 button long to move to the next setting 3 4 3 6 DDNS Port Setting Press buttons to move to the digit you want to change and press buttons to change the numbers Default Setting 09880 This is to specify the Port of the network server con...

Page 39: ...Press buttons to select the menu you want to change and press ENT button 3 5 1 Application Setting Select F3 3 Option 1 Application on the main screen and the following screen will appear Set the operating mode that you want to set Default Setting 1 Access This is to set an operating mode of the terminal Select 1 for simple access control 2 for T A control and 3 for drinking water management After...

Page 40: ...d mode is always displayed if another function key is not pressed Even if the Leave mode is authenticated by pressing F2 button the terminal display mode is automatically turned into the Leave after authentication Therefore it is convenient to manage T A After F1 Time set F2 Time F3 Time F4 Time and Access Time in the same way As shown below each time zone must be set not to overlap each other Ex ...

Page 41: ...r Attend or Leave it is available by unchecking other function keys After selecting the set value press ENT button and all authentication settings will be finished and the screen will move to the upper menu 3 5 1 2 When setting to 3 Cafeteria If time setting is unnecessary it is set to 00 00 00 00 This is to set the breakfast time Breakfast is unconditionally authenticated within the set time zone...

Page 42: ... within the same meal time zone When attempting authentication again the Duplicated message is displayed and the authentication fails Subsequently press ENT button and the following screen will appear Default Setting 2 No At least five authentication modes may be set if necessary Whether to use function keys of F5 F6 is determined using F1 F3 keys When setting to 1 Yes press the F1 F2 F3 mode once...

Page 43: ...shed and the screen will move to the upper menu 3 5 2 Authentication Method Setting Select F3 3 Option 2 Verify on the main screen and the following screen will appear 3 5 2 1 Set whether to display ID upon successful authentication Default Setting 2 User Name 1 displays the authenticated user ID 2 displays the user name on the LCD If there is no user name the user ID is displayed 3 displays the e...

Page 44: ...can be authenticated using card only in the terminal that this option is set to 1 After selecting the set value press ENT button and the screen will go to the upper menu 3 5 2 3 To authenticate only using the information saved in the Smart Card Default Setting 2 No This option makes it possible to authenticate only using the user information and fingerprint recorded in the card without downloading...

Page 45: ...is set to 0 However if it is set to the greater value than 0 re authentication cannot be permitted until the time lapses more than the set time after successful authentication After selecting the set value press ENT button and the screen will go to the upper menu 3 5 2 5 Global Block Setting Default Setting 2 No This option is to prohibit the user from authenticating within the short time After su...

Page 46: ... the server authentication mode if the network error time is set the time to wait for authentication can be set For example if the error time is set to 5 seconds when the user does not receive any response from the server for 5 seconds after authentication request an error message comes out However the user is processed as authentication failure After selecting the set value press ENT button and a...

Page 47: ...t connected Set to 3 if the lamp for displaying authentication success failure is installed the lock port Press ENT button to move to the next setting 3 5 3 2 Door Open Time Setting Default Setting 03 Unit Second This option is to specify the time when after authentication through the terminal the door is opened and then closed Strike type means the time when if opening the door after authenticati...

Page 48: ...unforeseen circumstances The alarm allows users to check the cause that the door is unclosed and take any action so that the door can be closed normally To use this function the lock must have the function to monitor whether the door is open or close The monitoring pin of the lock must be also connected to the terminal To check whether the door is open or close the mode must be set to 2 or 3 After...

Page 49: ...ccurs silent for 0 small volume for 1 and large volume for 3 Press ENT button to move to the next setting 3 5 4 3 Case Open Alarm Setting Default Setting 1 Yes This option is to set whether an alarm occurs when the terminal case is open The alarm occurs for 1 and it does not occur not for 2 After selecting the set value press ENT button and the screen will go to the upper menu 3 5 5 Camera Setting...

Page 50: ...creen and the following screen will appear 3 5 6 1 Time Synchronization Setting Default Setting 1 Auto This option is to set how to synchronize the current time of the terminal with the server time Set to 1 Auto to automatically synchronize with server time and set to 2 Manual to manually synchronize with server time Press ENT button to move to the next setting 3 5 6 2 Calendar Setting Default Set...

Page 51: ... the desired position using buttons and modify the existing values using buttons Press ENT button to move to the next setting 3 5 6 4 Time Display Setting Default Setting 2 05 00 PM This option is how to display the current time of the terminal When setting to 1 the time is displayed to the 24 hour time When setting to 2 the time is displayed by separating with AM PM After selecting the set value ...

Page 52: ...the ID value and press ENT button Default Setting 0 After selecting the set value press ENT button and the screen will go to the upper menu 3 5 8 Mobile Key Setting Select F3 3 Option 8 M Key Set on the main screen and the following screen will appear 3 5 8 1 Set whether to use mobile key Set whether to use the mobile key of the terminal Default Setting 1 Yes Press ENT button to move to the next s...

Page 53: ... 3 Bluetooth Name Setting When selecting 2 No in the registration mode of 3 5 8 2 the BLE name set currently is displayed Press ENT or ESC button to move to the upper menu 3 6 Terminal Information Inquiry Select 3 Information on the main menu and the following screen will appear All the environmental settings of the terminal can be checked in order Press buttons and scroll them up and down and you...

Page 54: ...User The total number of users registered in the terminal including administrators All Admin The number of administrators registered in the terminal Max User The maximum number of users who can be registered in the terminal All FP The total number of fingerprints saved in the terminal Max FP The maximum number of fingerprints that can be registered in the terminal All Log The number of the authent...

Page 55: ...Card on the main screen and the following screen will appear This is an additional function regardless of the terminal environment setting In the case of the terminal that the card reader is added the card number can be checked for card registration via the server Place the card on this screen and the card number will be displayed on the LCD To exit the card read press ESC button to move to the up...

Page 56: ...er Connect the REDled of controller to DM0 or DM1 through the board toward TR Set the relevant pin to 9 Ctrler Out WiegandOut must be set Press ENT button to move to the next setting 3 7 3 2 Monitor 2 Input Port Setting Set when connecting an external contact to DM1 When using a motor lock set to 1 or 2 Default Setting 0 None 0 None When nothing is connected 1 NO or 2 NC When the open door status ...

Page 57: ...ered Set whether to use the duress fingerprint alarm Default Setting 2 No The default setting is 2 No When it is set to 1 Yes if the pre registered fingerprint is authenticated the voltage of 12V will flow into L2 Pin If any emergency detection device such as a siren is connected to this Pin it will operate If Duress FP is set to 1 Yes the menu for setting the time corresponding to 2V will appear ...

Page 58: ...n that does not need to change after installation It is recommended that they are not changed unless there is any clear purpose 3 8 1 System Configuration Select F3 6 Device 1 System Conf on the main screen and the following screen will appear 3 8 1 1 User ID Digit Setting Default Setting 4 This is a portion for setting the length of user ID The length of user ID can be set to the 2 8 digit It sho...

Page 59: ...6 Device 2 Card Format on the main screen and the following screen will appear Default Setting 0 Default This option is to specify the format that displays the read card number When setting to Hexa the format is displayed to the hexadecimal number When setting to Decimal the format is displayed to the decimal number In the device equipped with the RF low frequency card reader if the mode is set to...

Page 60: ...on process with the ID input is 1234 this option finds the fingerprint registered to the ID of 1234 from the terminal database and compares it with the fingerprint on the fingerprint input window However in case of 1 1 authentication if the 1 1 authentication level of users is not set to 0 using the terminal authentication level the 1 1 authentication level of users is applied Press ENT button to ...

Page 61: ...licon However too dry fingerprints may not be entered even when entering actual fingerprints After selecting the set value press ENT button and the screen will go to the upper menu 3 8 3 4 Similar fingerprint registration restriction setting Default Setting 1 Yes If the mode is set to 1 Yes this option acts to check whether a new fingerprint is the same as the pre registered fingerprint and to pre...

Page 62: ...00101101 0001 1001 10001111 0 3 34bit Sitecode 1 byte User ID 3 bytes are transferred User ID should be set to the 7 digit or less number However if User ID is 8 digits Sitecode is ignored and only User ID 4 bytes is transferred Example SiteCode 001 UID 123456 0 00000001 00000001 11100010 01000000 0 4 Custom This is the user defined setting that is available only in the server Only checking is pos...

Page 63: ...l Initialization Select F3 6 Device 5 Initialize on the main screen and the following screen will appear Select 1 to initialize the set value 2 to initialize the authentication records 3 to initialize the factory and 4 to use the UDL 3 8 5 1 Set Value Initialization Select 1 to initialize and 2 to cancel This option initializes all settings of the terminal except for the MAC physical addresses and...

Page 64: ...ck beep occurs and the screen moves to the upper menu 3 8 5 3 Factory Initialization Select 1 to initialize and 2 to cancel This option deletes all settings users and log information except for the MAC physical addresses and serial numbers saved in the terminal and initializes the terminal to the status shipped at a factory When initialization is successfully completed the success buzzer occurs an...

Page 65: ...der The number of exported users can be checked on the LCD Import User USB port is service port Used when the user data USER DAT saved in USB is imported into the terminal The user file USER DAT must be saved with a file name of USER DAT in the unisuser folder The size of imported data can be checked on the LCD Upgrade USB port is service port Used when upgrading the terminal firmware by using the...

Page 66: ...creen is displayed only when Ext Device is set to 2 or 3 This option is used to allow only authorized users to access and leave the office To this end the terminal and Slave Reader are installed to both the inside and outside of the door Only users who access the office by authentication via the terminal can leave the office by authentication via the Slave Reader When setting 1 Yes the server auth...

Page 67: ...488 3099 E mail sales unioncomm co kr http www unioncomm co kr Press ENT button to move to the next setting Default Setting 1 None This screen is displayed only when Ext Device is not set to 3 When connecting an external device of LC010 to the terminal the mode is set to 2 Lock Ctrl When the terminal interlocks with MCP040 RS485 ID must be set ...

Page 68: ...in the time zone set to the Attend time F2 Authentication Press F2 key to change to the F2 mode and then perform authentication Authentication is performed without changing the mode within the time zone set to the Leave time F3 Authentication Press F3 key to change to the F3 mode and then perform authentication F4 Authentication Press F4 key to change to the F4 mode and then perform authentication...

Page 69: ...nd If your fingerprint is successfully authenticated the voice message of You are authorized comes out and a success message is displayed on the LCD Error Message The following messages will appear with the voice message of Place Same FP When authentication fails When the fingerprint is registered but its authentication is attempted in the access control time 4 1 3 Authentication Using Card For us...

Page 70: ... voice message of You are authorized comes out and a success message is displayed on the LCD Error Message The following messages will appear with the voice message of Place Same FP When a unregistered card is entered When the card is registered but its authentication is attempted in the access control time For users who are registered with the FP and Card Place the card on the main screen and the...

Page 71: ...ch authentication mode Authentication Method Attend Authentication Press F1 key to change to the attend mode and then perform authentication Authentication is performed without changing the mode within the time zone set to the Attend time Leave Authentication Press F2 key to change to the leave mode and then perform authentication Authentication is performed without changing the mode within the ti...

Page 72: ... is not the meal time No authentication attempt The default screen during the meal time If the authentication is successful When the mode is set to Not allowed Duplicate Authentication Unallowable if the authentication is again attempted after successful authentication a duplicate authentication error is displayed When authenticating with the fingerprint Enter the fingerprint to receive authentica...

Page 73: ...se harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try correct the interference by one or more of the following measures 1 1 Reorient or reloc...

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