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Link Management – Setings

IP health check

– this feature is prepared for switching between profiles or lines. MG102 is

checking availability of Monitored host 1 (optionaly 2). If the host (hosts) is (are) not reachable the
second profile (link) will be switched to.

Note

This functionality has a close relationship with Connection Supervisor.

Description

Parameter

The required signal strength for GSM/UMTS in order to qualify the link as a fallback
alternative.

Mobile:

The required signal strength for WLAN in order to qualify the link as a fallback al-
ternative.

WLAN:*

Specify whether the Signal strength LEDs on the MG102 front panel shall indicate
the WLAN or mobile signal strength.

Signal strength

LED shows:

Note

WLAN is available only with relevant HW.
IP health check option is not used at M!DGE.

Configuration

Summary of Contents for Midge MG102

Page 1: ...ating manual MG102 M DGE GPRS EDGE UMTS routers 1 1 12 17 2012 www racom eu RACOM s r o Mirova 1283 592 31 Nove Mesto na Morave Czech Republic Tel 420 565 659 511 Fax 420 565 659 512 E mail racom raco...

Page 2: ......

Page 3: ...Analyzer 112 5 Customer Service 114 5 1 Support 114 A Connectors and Cables 115 A 1 Pin Assignments for the Communication Interfaces 115 A 2 Ethernet Plug ETH RJ 45 116 A 3 Power Plug MG102 116 A 4 Ca...

Page 4: ...ormat 63 3 4 Reading of VTG data format 64 3 5 Reading of GSV data format 64 3 6 Reading of MID data format 65 A 1 Pin assignment COM interface RS232 115 A 2 Pin assignment COM interface RS485 115 A 3...

Page 5: ...an in troduction to M DGE MG102 Wireless Router The following chapters describe the installation and the configuration In next description is used the notation router instead of GPRS EDGE UMTS router...

Page 6: ...yes UMTS HSDPA HSUPA yes yes WLAN 2 2 2 2 2 2 1 SIM card sockets 4 4 4 4 4 4 2 Ethernet ports 1 1 1 1 1 1 1 Serial ports yes yes yes Integrated GPS re ceiver 2 2 Digital inputs out puts Following mode...

Page 7: ...duct Description M DGE Fig 1 2 Front panel and terminal panel of M DGE The following table describes the meaning of the status indicators 7 RACOM s r o MG102 M DGE GPRS EDGE UMTS routers Product descr...

Page 8: ...on is down green off Closed yellow on DO1 Opened yellow off Closed yellow on DO2 Opened yellow off Input set yellow on DI1 Input not set yellow off Input set yellow on DI2 Input not set yellow off USB...

Page 9: ...D 1 V1 12 48 V 2 VGND 3 V2 12 48 V 4 RxD 5 TxD 6 GND 7 Out1 Dry contact relay Normally open with M DGE without powering 8 9 Out2 Dry contact relay Normally open with M DGE without powering 10 11 DI1 1...

Page 10: ...el has 10 status indicators In addition there are two SIM card slots and a reset button at the front panel Fig 1 3 The Front Panel The following table describes the components on the front panel MG102...

Page 11: ...nal off Software update running Mobile connection is being established blinking slowly green UMTS GSM Front Mobile connection is up on Mobile connection is down off WLAN connection is being establishe...

Page 12: ...S GSM Antenna Back WLAN antenna connector Impedance 50 Connector SMA female WLAN Antenna Back Sub D 9 model 2009 or RJ45 port model 2010 RS232 default or RS485 configurable COM Back 4 Ethernet ports 4...

Page 13: ...on 3 1 8 Services COM Server Tunneling of the serial line over IP Modbus RTU to Modbus TCP Gateway DHCP Server DNS Proxy Server Dynamic DNS Client E mail Client Notification via E mail and SMS SMS Cli...

Page 14: ...n EDGE Circuit Switched Data CSD 1 5 2 Access to a Remote Network M DGE MG102 can be used to access a remote network Possible setups are Access via public IP address Access via M DGE MG102 initiated V...

Page 15: ...it you may install SIM cards for two different networks of two different mobile network operators If you only use one SIM card insert it in SIM socket 1 M DGE has only one SIM card socked For instala...

Page 16: ...er supply which must have a limited and SELV circuit output 2 3 GPRS EDGE UMTS router assembly Routers M DGE MG102 are special devices which require skilled assembly For subsequent maintenance RACOM s...

Page 17: ...E MG102 we recommend configuring it using the M DGE MG102 Web Manager 3 1 Configuration via the M DGE MG102 Web Manager The M DGE MG102 Web Manager can always be reached via the Ethernet interface Aft...

Page 18: ...c IP address on your PC e g 192 168 1 10 mask 255 255 255 0 so that it is operating in the same subnet as the M DGE MG102 The factory default IP address is 192 168 1 1 The default subnet mask is 255 2...

Page 19: ...ome This page gives you a system overview It helps you when initially setting up device but also functions as dashboard during normal operation 19 RACOM s r o MG102 M DGE GPRS EDGE UMTS routers Config...

Page 20: ...ext link in the priority list You can configure each link to be either established when the switch occurs or permanently in order to minimize link downtime Description Step This link will be used if e...

Page 21: ...sor Description Parameter The required signal strength for GSM UMTS in order to qualify the link as a fallback alternative Mobile The required signal strength for WLAN in order to qualify the link as...

Page 22: ...segment and the headers must not add up to more than the number of bytes in the maximum transmission unit MTU Description Parameter The maximum segment size MSS for the mobile interface MSS adjustmen...

Page 23: ...aces It is possible set the same LAN for both or LAN1 and LAN2 or LAN and WAN combination Separated mode LANs MG102 IP Address Network Ports 192 168 1 1 192 168 1 0 24 Port 1 192 168 2 1 192 168 2 0 2...

Page 24: ...DGE MG102 LAN Usually the first address within that LAN is assigned to the router Provide that IP address and net mask in dot decimal notation or use the defaults MG102 M DGE GPRS EDGE UMTS routers RA...

Page 25: ...nal DHCP server IP mode Enable or disable the PPPoE connection Status PPPoE password Password Specifies the service name set on the access concentrator Leave it blank unless you have many services and...

Page 26: ...link loss the connection is reestablished Administrative connec tion status Number of redialing attempts before switching to the next profile Redial attempts Time in minutes after that an idle connect...

Page 27: ...lenge Handshake Authentication Protocol CHAP or Password Authen tication Protocol PAP Authentication method Ckeck this if the connection is made to an ISDN modem Call to ISDN Enable or disable Van Jac...

Page 28: ...dministrators ping check failed Fallback Profile will be used in case that number of trials set in Interfaces WAN Link Managenet Settings will be excceded Note If the time set in Services Connection S...

Page 29: ...e PIN code for the SIM card PIN code Enable or disable PIN protection PIN protection Number of Short Message Service Centers SMSCs for sending Mobile Originating MO SMS messages Contact your mobile op...

Page 30: ...bits used to indicate the end of a frame Stop bits This property specifies the number of data bits contained in each frame Data bits In XON XOFF software flow control either end can send a stop XOFF o...

Page 31: ...feature Digital I O Server M DGE only Digital I O Management via Web Manager The digital inputs and outputs can be monitored and controlled via the Web Manager or by software 31 RACOM s r o MG102 M D...

Page 32: ...he state on 0 7 OUT2 OUT1 IN2 IN1 0 0 0 0 Monitor the digital inputs and outputs Every change of digital inputs triggers a message of the above format to be sent It also contains the valid states of t...

Page 33: ...d decimal or host network names Destination The network s IP address together with its address mask defines a range of IP ad dresses For IP subnets the address mask is referred to as the subnet mask F...

Page 34: ...r Local Host The access from the WAN interface to M DGE MG102 itself and its local applications can be managed using this filter Access Control for Exposed Host from WAN and OpenVPN The access from th...

Page 35: ...t into multiple LANs this filter manages the access from any LAN port to any VPN Tunnel Use the option specify permitted networks to permit access to certain networks Those networks might be any peer...

Page 36: ...from the outside Internet Description Parameter Enable or disable NAPT NAPT needs to be enabled normally i e when using Internet Access Internet Service Providers will not route your private LAN Addr...

Page 37: ...NAPT on OpenVPN Interface The same settings as above but for other interface Expert Mode Upload text files with firewall rules 37 RACOM s r o MG102 M DGE GPRS EDGE UMTS routers Configuration...

Page 38: ...t come with the OpenVPN software A Guide to basic RSA Key Management is found under http openvpn net easyrsa html For alternative authentication methods see http openvpn net index php documentation ho...

Page 39: ...ddress First server address First OpenVPN server port default 1194 First server port Second OpenVPN server address optional Second server address Second OpenVPN server port optional Second server port...

Page 40: ...OpenVPN client configurations Typically such a zip file includes files such as client conf The client configuration file referring to ca crt OpenVPN root certificate file client crt OpenVPN client cer...

Page 41: ...flicts If OpenVPN is enabled and the configuration mode is set to server expert configuration all configura tions conf will be started after M DGE MG102 startup Consider the following points when runn...

Page 42: ...IPsec Administration Description Parameter Enable or disable IPsec IPsec administrative status IPsec Configuration MG102 M DGE GPRS EDGE UMTS routers RACOM s r o 42 Configuration...

Page 43: ...43 RACOM s r o MG102 M DGE GPRS EDGE UMTS routers Configuration...

Page 44: ...ce IKE encryption method IKE encryption IKE hash method IKE hash IKE Diffie Hellman Group IKE Diffie Hell man Group Use Perfect Forward Secrecy This feature increases security as with PFS penet ration...

Page 45: ...supported by Microsoft Dial up Networking Users that are allowed to connect to the PPTP server are defined under the section User Accounts Description Parameter Enable disable PPTP server PPTP state...

Page 46: ...enabled or disabled Consequently the device will allow incoming calls or not Dial in administrative status Shows whether a connection is active or not Dial in operational status Dial in Server Config...

Page 47: ...ket Timeout If data is received on serial line waits for more data for the configured time to avoid to much segmentation which would lead on inefficiency Max Latency Timeout Limits the maximum latency...

Page 48: ...CP for modbus gateway Protocol on TCP IP The protocol implicitely defined on the COM port Protocol on COM port TCP Configuration Description Parameter The protocol implicitely defined on the COM port...

Page 49: ...supervisor monitors connectivity and automatically recovers the connections in case of link loss First you should check the option monitor connection establishment to make sure that problems during c...

Page 50: ...ait until sending the next probe in case the last probe was unsuccessful Retry interval Number of consecutive unsuccessful probes that are required until the next recovery action is initiated Consecut...

Page 51: ...ned or manually configured DNS servers DHCP Server Administration Description Parameter The Dynamic Host Configuration Protocol DHCP server can be enabled or disabled If it is enabled it will answer t...

Page 52: ...NS proxy server as third DNS server DNS server 3 DNS Proxy Server The DNS Proxy enabled M DGE MG102 forwards DNS requests to the DNS server provided by the mobile operator Devices within the M DGE MG1...

Page 53: ...atus Dynamic DNS Configuration Description Parameter DynDNS Service according Dynamic Network Services Inc www dyndns com Please consult www dyndns com for more details Service type URL under which M...

Page 54: ...eans that no notification via e mail will be performed E mail client status E mail Client Configuration Description Parameter Sender s e mail address From e mail address SMTP server address Server add...

Page 55: ...rror reported PPP_ERR See manual and logs to identify the problem PPP connection failure VPN connection up tun0 tap0 interface address VPN_IP VPN connection established VPN connection down VPN connect...

Page 56: ...l Input 1 off Input change IN2 is On Digital Input 2 on Input change IN2 is Off Digital Input 2 off Output change OUT1 is On changed from DIO_SOURCE Digital Output 1 on Output change OUT1 is Off chang...

Page 57: ...tal output 1 possible values include on off DST_OUT1 Status of digital output 2 possible values include on off DST_OUT2 Subscribers Subscribers are recepients of SMS or e mail event notifications It i...

Page 58: ...e set based on the occurrence of several events GPS This feature is available on MG102xGx a valid GPS license is required GPS Settings GPS Settings menu allows enabling of GPS and setting of operation...

Page 59: ...s daemon is 2947 Note The GPS driven time synchronisation NTP menu SYSTEM Time Region requires running Berlios daemon on port 2947 Additional information about gpsd daemon you can find under http gpsd...

Page 60: ...4934 105294 N 01604 635478 E 0 0 26 9 250512 A 5B GPGSA A 3 02 04 05 07 08 10 13 3 2 1 6 2 8 31 PSTIS 61 Forward to remote host The GPS data will be send as UDP payload NMEA sentences GPRMC GPGSA GPGG...

Page 61: ...e host and to local COM port simultaneously Both UDP and COM interface will be used in the same time as mentioned above Following NMEA sentences are used with UDP or COM interface RMC Recommendet Mini...

Page 62: ...DOP and Active Satellites Example 3 2 GSA data format GPGSA A 3 02 04 07 08 10 13 4 3 2 2 3 8 34 Tab 3 2 Reading of GSA data format Description Units Name GSA protocol header Message ID M Manual forc...

Page 63: ...ix valid Position Fix Indicator 0 to 12 Satellite Used Horizontal Dilution of Precision HDOP meters MSL Altitude meters Units meters Geoid Separation meters Units not used second Age of Diff Corr not...

Page 64: ...3 2 11 10 77 255 39 13 62 061 33 05 23 305 16 19 047 7E GPGSV 3 3 11 20 02 135 23 30 078 29 01 333 4A Tab 3 5 Reading of GSV data format Description Units Name GSV protocol header Message ID Range 1...

Page 65: ...umber Checksum End fo message termination CR LF GPS Data GPS Data is only supported with activated Berlios GPS daemon See chapter Serve with Berlios daemon WLAN WLAN is available only with MG102 2xW h...

Page 66: ...WLAN Configuration The WLAN interface can be operated in client or access point mode In client mode it will be an additional WAN link in access point mode it will serve as WLAN access point MG102 M DG...

Page 67: ...you configure WLAN as a Access point you have to set SSID Chanel number used Authentific ation mode and the Preshared key WLAN Network List 67 RACOM s r o MG102 M DGE GPRS EDGE UMTS routers Configurat...

Page 68: ...ollowing the EU directive 1999 5 EC without any limitation except for the countries mentioned below France In case the product is used outdoors the output power is restricted in some parts of the band...

Page 69: ...supply Norway Restrictions Frequency Range This subsection does not apply for the geographical area within a radius of 20 km from the center of Ny lesund 2400 0 2483 5 MHz WLAN b g Russian Federation...

Page 70: ...n Parameter Sending SMS can be enabled or disabled Disabling sending SMS means that no notification via SMS will be performed SMS notification Receiving SMS can be enabled or disabled Disabling receiv...

Page 71: ...t IP address of the VPN interface if enabled The profile name is an optional parameter connect terminates all connections on the mobile interface Dial out and VPN discon nect M DGE MG102 will be resta...

Page 72: ...rameter SSH server port Port The standard port 22 is used For higher security change it to different number This number shall be used as parametr in SSH command MG102 M DGE GPRS EDGE UMTS routers RACO...

Page 73: ...traps will be sent to Trap target host The port where the traps will be sent to Trap target port A trap will be sent if signal strength goes lower than this Signal strength trap threshold dBm No furth...

Page 74: ...startup trap is implemented using the standard coldStart warmStart traps The system shutdown trap is sent when the system is rebooted via the reboot function of the web in terface or when the watchdog...

Page 75: ...d port default 2157 for arriving UDP packets with a string in the payload If an UPD package is arriving the event Arriving UDP Message is fired see chapter Use the Event Manager the section called Eve...

Page 76: ...ractive communication between the subscribers and applications across a GSM Network A sample USSD service is the bill status service accessed by dialing 141 or similar numbers in between and ac cordin...

Page 77: ...Web Server Description Parameter Web server port for http connections HTTP port Web server port for https connections HTTPS port 77 RACOM s r o MG102 M DGE GPRS EDGE UMTS routers Configuration...

Page 78: ...broadcast packets from the Master The Backup router starts using the virtual IP address after a 3 second break of service of the Master router e g disconnected cable not working Master router The IP...

Page 79: ...rs or remotely over RADIUS Description Parameter Enable or disable the captive portal Administrative Status Define whether user must accept by pressing a button or they have to au thenticate to a RADU...

Page 80: ...3 1 9 System Authentication MG102 M DGE GPRS EDGE UMTS routers RACOM s r o 80 Configuration...

Page 81: ...E MG102 offers automatic and manual file based configuration A single text file cfg or a zip archive zip containing one or more of the following files can be up loaded When uploading a zip file the fi...

Page 82: ...col used to transfer the new user configuration file to M DGE MG102 You will need an appropriate server Protocol The server and directory where the new s configuration file can be downloaded Server IP...

Page 83: ...ent key certificate_mode templateProfiles if available Current configura tion files The following files are acceppted for upload cfg max size 100KB zip max size 100KB The zip file may include user con...

Page 84: ...be initiated by pressing and holding the Reset button for at least five seconds The factory reset will also set the IP address of the Ethernet interface to 192 168 1 1 You will be able to communicate...

Page 85: ...Troubleshooting Network Debugging 85 RACOM s r o MG102 M DGE GPRS EDGE UMTS routers Configuration...

Page 86: ...Log Files Log files can be viewed a downloaded here Please provide these files when placing a support re quest System Log Redirection MG102 M DGE GPRS EDGE UMTS routers RACOM s r o 86 Configuration...

Page 87: ...he syslog messages will be forwarded to A Syslog server has to be running on this IP address You can use free TFTP server TFTPD32 for example IP address Restart Tech Support 87 RACOM s r o MG102 M DGE...

Page 88: ...e For using of this feature a connection to Internet is required System Information Provide this information when placing a support request MG102 M DGE GPRS EDGE UMTS routers RACOM s r o 88 Configurat...

Page 89: ...ization from GPS use a non existing address of NTP server e g 1 1 1 1 Note The time synchronisation from GPS requires running Berlios daemon on port 2947 SER VICE GPS Settings Description Parameter En...

Page 90: ...n appropriate server Protocol The directory where the new software can be downloaded Server IP address and path The result of the last try will be displayed here Last software update Manual Software U...

Page 91: ...ers Server IP address and path The result of the last try will be displayed here Last software update Step by Step Description Para meter Connect your PC with MG102 using a network cable 1 If the IP a...

Page 92: ...4 On the web page SYSTEM Manual Software Update enter the IP address and path of the TFTP server 192 168 1 2 as follows 5 Press Apply and confirm by pressing OK Wait until the update is complete See...

Page 93: ...nfiguration If you are using the Web Manager and its forms to configure M DGE MG102 you may skip this chapter A configuration parameter consists of two main parts its name latter called key and its va...

Page 94: ...Z 0 9 _ username All but password 0 9 phone number Time e g for automatic software or config uration update hh mm ss 0 9 and time 3 2 1 Interfaces related Parameters Ethernet Description Range Defaul...

Page 95: ...Meth od Acess Point Name hostname void dialout profiles 0 apn 0 off 1 enable IP header compression 0 1 void dialout profiles 0 IPHC 0 off 1 enable software compression 0 1 void dialout profiles 0 IPSC...

Page 96: ...witch never elpas8h elaps16h elaps24h never dialout profiles 1 switchCon dition r e d i a l A t t e m p t s Reached 0 disabled 1 enabled 0 1 0 network MSS status Maximum Segment Size 100 1500 1400 net...

Page 97: ...ription Range D e f a u l t Value Parameter 0 NAPT off 1 NAPT on 0 1 1 with j 0 49 napt_mobile status External port range start 1 65535 void napt_mobile j extPort start External por range end 1 65535...

Page 98: ...t Access Control List Local Host Description Range D e f a u l t Value Parameter 0 deny all 1 permit entries 0 permit all 0 1 2 2 firewall_local_host policy Source host net hostname void with j 0 19 f...

Page 99: ...FQHN hostname void vpn configuration serverAd dress OpenVPN server port 1 65535 void vpn configuration serverPort 2 nd OpenVPN server FQHN hostname void vpn configuration serverAd dress2 2 nd OpenVPN...

Page 100: ...1 1 ipsec dpd state For credential based authentication 5 120 30 ipsec dpd cycle 1 10 3 ipsec dpd failureCount PPTP Server Description Range Default Value Parameter 0 disabled 1 enabled 0 1 1 network...

Page 101: ...1 enabled 0 1 void serial_srv opt rtscts RS232 RS485 RS232 serial_srv opt phys_proto DNS Proxy Server Description Range Default Value Parameter 0 DNS Proxy off 1 DNS Proxy on 0 1 1 network DNS status...

Page 102: ...lt Value Parameter 0 disabled 1 enabled 0 1 1 sms receiving status 0 disabled 1 enabled 0 1 0 sms sending status SMSC number phone number void sms sending gateway SMSC number phone number void sms sen...

Page 103: ...e Event Message password void events logInGUI message Event Message password void events logFailedGUI message Event Message password void events restartCrash message Event Message password void events...

Page 104: ...t Processor Description Range Default Value Parameter 0 1 2 9 void evtProc sequence hostname void with l 0 9 evtProc l eventName Send send message Switch switch digital I O send switchOn switchOff voi...

Page 105: ...Parameter 1 65535 2157 udpMessage receiving udp Port 3 2 6 System related Parameters User Accounts Description Range D e f a u l t Value Parameter not set reset admin password password void user admi...

Page 106: ...atus hh mm ss time swu_auto time hostname swu_auto url Configuration Update Description Range Default Value Parameter 0 disabled 1 enabled 0 1 1 cfg_auto status hh mm ss time void cfg_auto time hostna...

Page 107: ...network selection method to automatic void cli select Show a status overview of M DGE MG102 string cli status Print the cli help message usage string cli help Abort a command Exit from CLI void Ctrl C...

Page 108: ...e network sim1 sim2 Example cli network sim1 cli set produces no return value and no error message To check if the modification took place use cli get Note The following commands are identical cli net...

Page 109: ...te of the SIM Card cli status overview interfaces sim_state show the state of the PIN cli status overview interfaces pin_state show the actual signal strength cli status overview interfaces sig nal_st...

Page 110: ...vices sms_rec_state show the state of the SMS sending service cli status overview services sms_send_state show the state of the E Mail service cli status overview services email_state show the state o...

Page 111: ...Usage and Return Value Command Not for end user use Root rights are required Exit 111 RACOM s r o MG102 M DGE GPRS EDGE UMTS routers Configuration...

Page 112: ...the SIM page PIN code required See the Debug Log under Check APN phone number username password Connection failed 4 2 System Log and Log Files Find more information about troubleshooting tools The Web...

Page 113: ...113 RACOM s r o MG102 M DGE GPRS EDGE UMTS routers Troubleshooting...

Page 114: ...5 Customer Service 5 1 Support Please send questions or comments about M DGE MG102 to support racom eu MG102 M DGE GPRS EDGE UMTS routers RACOM s r o 114 Customer Service...

Page 115: ...A 1 Pin assignment COM interface RS232 COM RS232 DSUB9F In Out signal pin O CD 1 O RxD 2 I TxD 3 I DTR 4 GND 5 O DSR 6 I RTS 7 O CTS 8 RI 9 Tab A 2 Pin assignment COM interface RS485 COM RS485 DSUB9F...

Page 116: ...connect DTR 7 Do not connect RTS 8 A 2 Ethernet Plug ETH RJ 45 Fig A 3 RJ 45 Plug Tab A 4 Pin assignment Ethernet Interface ETH Ethernet 10BaseT and 100BaseT RJ 45 Socket signal pin TX 1 TX 2 RX 3 RX...

Page 117: ...D SUB 9 Tab A 6 Pin assignment Ethernet Interface RS232 D SUB 9 ETH RJ 45 In Out pin pin signal O 2 3 RxD I 3 6 TxD I 4 7 DTR 5 5 GND 5 4 GND O 6 2 DSR I 7 8 RTS O 8 1 CTS 117 RACOM s r o MG102 M DGE...

Page 118: ...sers of the duty to observe the restrictions concerning the utilization of radio devices at petrol stations in chemical plants or in the course of blasting works in which explosives are used Switch of...

Page 119: ...lectronic equipment containing these hazardous substances lead cadmium mercury hexavalent chromium polybrominated biphenyls PBBs and polybrominated diphenyl ethers PBDEs End of life recycling programm...

Page 120: ...t Radio Service GSM Global Packet Radio Service GUI Graphical User Interface HSCSD High Speed Circuit Switched Data HSDPA High Speed Downlink Packet Access HSUPA High Speed Uplink Packet Access HTML H...

Page 121: ...SW Software TCP Transmission Control Protocol TFTP Trivial File Transfer Protocol UDP User Datagram Protocol UMTS Universal Mobile Telecommunications System URL Universal Resource Locator VPN Virtual...

Page 122: ...Appendix D Revision History 2011 11 01 Revision 1 1 1 XML version MG102 M DGE GPRS EDGE UMTS routers RACOM s r o 122 Revision History...

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