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Motorola MT7711, User Manual

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Motorola MT7711 User Manual Download Page 68

 

 

 

 

68 

 

In the implementation of PPTP and L2TP on the MT7711, MPPE 
encryption is optional. Both protocols require a login; L2TP requires a 
passkey for authentication.   
 
There are three pages under VPN in the MT7711 configuration manager: 
IPsec, L2TP/PPTP and Event Log. Use the IPsec page to set up an 
endpoint for a site to site IPsec connection. Use the PPTP/L2TP page to 
set up a server for a set of remote clients that connect via PPTP or L2TP. 
You may find the Event Log useful to determine what has gone wrong if 
you have trouble setting up a VPN. 
 
For details on how to configure a VPN on the MT7711, follow the help 
available through the information icons on the configuration manager 
pages. 

   

 

When the MT7711 is configured as a VPN endpoint, devices that connect 
to the endpoint will need to know the IP Address of the MT7711. You can 
find this address on the Status 

 Connections page. To provide the most 

stable VPN connections, the MT7711’s router should be provisioned with 
a static IP Address. You will need to order this from your cable service 
provider. 

 

The VPN implementations on the MT7711 are best effort. They are also 
Windows-centric. You will have to verify suitability for your own environment. 
 

 

 

Summary of Contents for MT7711

Page 1: ...User Manual 24x8 cable modem plus AC1900 WiFi router Model MT7711 2 Xfinity phone lines ...

Page 2: ... work properly in all environments and applications and makes no warranty or representation either expressed or implied with respect to the quality performance merchantability or fitness for a particular purpose of the software or documentation The manufacturer reserves the right to make changes to the hardware software and documentation without obligation to notify any person or organization of t...

Page 3: ... hazard The MT7711 should normally be installed indoors If you use it outdoors protect it from moisture and be careful about temperature Your MT7711 should be operated in an environment that s between 32 and 104 Fahrenheit 0 to 40 Centigrade Your MT7711 should not be in a confined space There should be room for air flow around the top front and sides of the MT7711 Make sure to use your MT7711 s po...

Page 4: ... OR REPLACEMENT 19 Telephone Adapter 20 TELEPHONE LIGHTS 21 MAKING AND RECEIVING CALLS 21 OPERATING ON BATTERY POWER AFTER POWER LOSS 22 Alternate Ways to Connect Your Coax Cable 23 Connecting Devices to Your Cable Modem Router 23 CONNECTING A DEVICE VIA ETHERNET 24 CONNECTING A SMARTPHONE TABLET OR OTHER WIRELESS DEVICE VIA WIRELESS 24 Setting up an HDTV Streaming Media Device or Other Device 25 ...

Page 5: ...RELESS GUEST NETWORKS 42 Changing Firewall Settings 45 Tuning Wireless Performance 47 FOR THE 2 4 GHZ BAND 49 FOR THE 5 GHZ BAND 50 WIFI MULTIMEDIA WMM 52 Parental Control 55 SETTING UP A BLACKLIST 57 SETTING UP A WHITELIST 59 SETTING UP TIMES WHEN INTERNET ACCESS IS ALLOWED AND NOT ALLOWED 62 VPN Virtual Private Network 64 Changing Your MT7711 s Username and Password and Resetting to Factory Defa...

Page 6: ...HAT IF INCOMING PHONE CALLS DO NOT RING 77 WHAT IF MY PHONE S CALLER ID DOESN T DISPLAY A NAME 78 WHAT IF MY MT7711 HAS BEEN WORKING THEN STOPS WORKING 78 WHAT IF I M GETTING INTERNET SERVICE BUT MY SPEED IS DISAPPOINTING 78 WHAT IF I M TOLD THAT MY MT7711 ISN T APPROVED BY MY CABLE SERVICE PROVIDER 79 WHAT IF I AM CONNECTED WIRELESSLY BUT MY CONNECTION SEEMS SLOW OR KEEPS DROPPING 79 WHAT IF I DO...

Page 7: ...ted in Chapter 2 of this User Guide Model MT7711 has a Configuration Manager that provides a lot of technical information about Model MT7711 and that tells you how to do some useful things as summarized below Please note that some users will never need to use the Configuration Manager Chapter 3 Telephone Adapter Chapter 4 Alternate Ways to Connect Your Coax Cable Chapter 5 Connecting Devices to Yo...

Page 8: ...8 Chapter 13 VPN Virtual Private Network Chapter 14 Troubleshooting Tips ...

Page 9: ...ick Start Packaged with your MT7711 Power Supply Ethernet Cable RJ11 Phone Cord Coax Wrench Velcro Cable Organizer Para una Guía de Inicio Rápido en español por favor vaya a www motorolanetwork com MT7711ir ...

Page 10: ...ervice Now connect your MT7711 as shown on the following page Connecting to a Coax Cable Please see the connection photo on the next panel You connect your MT7711 to a live coax cable Sometimes a cable will already be available Sometimes there s a coax wall jack available and you connect to the jack with a coax cable Your MT7711 can also share a coax cable attached to a TV by using a coax splitter...

Page 11: ... to either or both of these phone jacks ETHERNET LAN 1 4 You can connect a computer HDTV game station or other Ethernet capable device to any of these 4 LAN ports RESET WPS button COAX Connect a live coax cable to the modem s COAX connector as discussed above Tighten the nut so it s finger tight You may want to use the supplied wrench Make the connection snug but not over tight ...

Page 12: ...asked for information about the MT7711 such as the Mac Address or Serial Number you can find this on the label on the bottom of the modem router Activate Activate your MT7711 by opening the Web browser of a computer or other device that s connected to your MT7711 and enter xfinity com activate Your device can be connected either wirelessly or via one of the MT7711 s Ethernet ports If you connect w...

Page 13: ...ter below for information on connecting via WiFi If browsing works Congratulations Your MT7711 s Internet capability is working If you have Xfinity phone service and want to use that make sure the MT7711 s Tel1 light is ON You may have to wait a few minutes after power up Then plug a phone into the Tel1 port Take the phone off hook and confirm there is a dial tone Then make a call and ask the pers...

Page 14: ...et up special Internet gaming settings You want to get performance information about the MT7711 modem and or built in router This can be helpful in diagnosing DOCSIS performance issues and or optimizing wireless performance If you need to access the MT7711 Configuration Manager open your Web browser Type http 192 168 0 1 in the address bar and then press the Enter key In the login dialog box type ...

Page 15: ...it helps to change the MT7711 wireless channel frequency to reduce interference with neighbors wireless networks This is discussed in the Troubleshooting section of this Quick Start Wireless range can be limited by a variety of issues including weak wireless clients and challenging building configurations Sometimes devices with a weak wireless signal will connect to the MT7711 and often those devi...

Page 16: ... Tel1 and Tel 2 with two different phone numbers You can connect almost any standard telephone equipment into an activated MT7711 telephone port This includes almost anything that connects using an RJ11 phone plug telephones cordless phone base stations answering machines etc If you want to connect a security system check with the security system manufacturer for compatibility Additional details c...

Page 17: ... ON Bonded with 2 or more channels Upstream Green or Blue OFF Upstream not connected or on battery back up Green Blinking Ranging in progress Green ON Connected on 1 channel Blue Blinking Negotiating bonded channel s Blue ON Bonded with 2 or more channels Online Green OFF Offline or on battery back up Blinking Trying to go online ON Online 2 4 GHz WLAN Green OFF WiFi is not enabled or on battery b...

Page 18: ...r phone service Blinking Battery is charging Fast Blinking Battery is not charging or depleted or if on back up power battery is low ON AC Power Fail Battery back up active If a blue light blinks continuously this indicates partial service at least one designated channel has not completed bonding You should still get high Internet speeds but your service provider may want to know so they can adjus...

Page 19: ...n the battery label for BP 15033 22 2150 S If you have the right battery installed and power is lost the Tel1 jack will provide up to five hours of talk time or eight hours of stand by time The Tel2 jack does not provide this back up feature Only phones that do not require their own power source will work during a power outage unless the phones are provided with their own separate battery back up ...

Page 20: ... devices that plug into the same phone line Their Ringer Equivalence Numbers need to add up to 5 or less One way to connect multiple devices is to plug the MT7711 phone port into a jack connected to existing telephone wiring Before doing this make sure to disconnect the wiring totally from the telephone company s network demarc This is normally done by unplugging a phone cord at the jack nearest t...

Page 21: ...port will only function if you have two phone line service from Comcast Xfinity Making and Receiving Calls You can make and receive calls through connected telephone equipment just as you would with any other landline telephone service Remember to dial 1 before long distance calls within the United States Check with Xfinity whether your plan supports international dialing and for dialing instructi...

Page 22: ...require their own backup power source When running under battery backup power only the Tel1 and Battery lights remain lit The battery light behaves according to this table Battery Green OFF No battery installed depleted battery or not provisioned for phone service Slow Blinking Battery is charging Fast Blinking Steady ON Battery is not charging or Depleted or if on back up power battery is low AC ...

Page 23: ...er and two cables of the right length Connecting Devices to Your Cable Modem Router You can connect computers smartphones tablets game consoles security cameras streaming media devices like Roku Chromecast AppleTV Internet enabled HDTVs and other devices to your cable modem router You can connect these devices either with an Ethernet cable a wired connection or via WiFi a wireless connection An Et...

Page 24: ... 5 GHz bands into client devices that support both bands If you haven t changed the factory settings you can find these on a label on the bottom of your modem s stand If you have changed the network names and or passwords use your new values See Chapter 9 if you want to change your wireless settings If you want to connect devices to a Guest Network use the Network Name and Password for that networ...

Page 25: ...section Within that section there s normally a Network section In that section you may need to specify that you have an Ethernet connection if that s how you connect to the MT7711 If you want to connect wirelessly to the MT7711 you ll need to select its wireless network name and then enter its wireless password ...

Page 26: ... the Configuration Manager You can access the Configuration Manager from a computer or any other device that has a browser and that is connected via Ethernet or wirelessly to your cable modem If you will be changing wireless settings it s much better to use a device that connects via Ethernet while you make these changes To access the Configuration Manager do the following 1 Open your browser 2 Ty...

Page 27: ...27 You should see this page 3 Type admin in the Username field 4 Type motorola in the Password field ...

Page 28: ...28 5 Click the Login button ...

Page 29: ...tion lets you view and modify your WiFi privacy settings and shows you basic information about your cable modem s addresses and software version The logout link lets you end your session with the Configuration Manager The Advanced button at the top of the page takes you to pages with more extensive information and options to configure your cable modem router ...

Page 30: ...ed page by clicking the Motorola stylized M Logo in the upper left hand corner of the page Note the circled i information icons to the right of the page You can click the icons for descriptions of entries The information icons appear on every page including Advanced pages ...

Page 31: ...utton Note the Menus and Submenus at the top of the page The currently selected menu item is highlighted top row and submenu items corresponding to the selected menu item are displayed in the second row The currently selected submenu item is indicated by a small white pointer underneath it In this screenshot the menu item Status and submenu item Software are selected The following sections in this...

Page 32: ...or games that don t involve connecting to another player or computer over the Internet Typically you will have to open ports on your router to support these devices There may be other settings that you need to change To open ports first log into the Configuration Manager as described in chapter 4 In summary you type 192 168 0 1 in the address bar of your browser go to that address enter the Userna...

Page 33: ...e how data flows from the address to specified LAN addresses and ports In this document we will describe how to create a rule for an IPv4 network The steps are similar for IPv6 To create an IPv4 Forwarding Rule first click the Add_IPv4 button You can now enter your port forwarding information ...

Page 34: ...ur device is using You game or device documentation should show you where to find this Your game or device may need more than one port to be forwarded In some cases the ports will be numbered sequentially in a range In other cases the ports may be separated In this case you will have to set up a separate forwarding rule for each port ...

Page 35: ...mber in the range Otherwise if there is only one number enter the start port number again 4 Unless instructed otherwise in your game or device documentation leave the External entries blank They will fill in automatically 5 Select the protocol TCP UDP or Both indicated in your documentation 6 Select Enable in the Enable Disable pulldown 7 Click Save Repeat these steps as necessary to create rules ...

Page 36: ...36 For games and game consoles you may also need to enable UPnP and to set the Firewall to OFF ...

Page 37: ...37 Check the UPnP Enable box and click Save at the top of the Router Selections box ...

Page 38: ...38 Select OFF in the IPv4 Firewall Protection pulldown and click Save ...

Page 39: ...ding access to your computers and other devices connected to your network You may want to change the wireless settings on the Primary Network The most common reason is that you re replacing a cable modem router and you want to use the same wireless network names and passwords that you ve had If you change the wireless settings on your MT7711 to match your previous settings you won t have to change...

Page 40: ...40 This will bring you to the Basic Status and Settings page where you can change your network name and password ...

Page 41: ...te the old Password then type in the new Password 5 Click the Save button Network Name can be from 6 32 characters long You can use the upper and lower case letters a z and A Z numbers 0 9 and special characters e g _ etc except the single quote Password can be from 8 63 characters long You can use upper and lower case letters a z and A Z numbers 0 9 and special characters e g _ etc except the sin...

Page 42: ...onfiguration Manager as described in chapter 5 In summary you type 192 168 0 1 in the address bar of your browser go to that address enter the Username admin and Password motorola then click the Login button This will bring you to the Basic Status and Settings page Click the Advanced button in the upper right This will bring you to the Status Software page Hover over the Wireless menu item and sel...

Page 43: ... click Save to enable the selected Guest Network The following steps are optional Follow them if you want to change the default Guest Network Name and Password 4 Select and delete the old Guest Network Name then type in the new Guest Network Name and click Save 5 You can click the Show Key box to check your typing for Password 6 Select and delete the old Password then type in the new Password 7 Cl...

Page 44: ... Name can be from 6 32 characters long You can use the upper and lower case letters a z and A Z numbers 0 9 and special characters e g _ etc except the single quote Password can be from 8 63 characters long You can use upper and lower case letters a z and A Z numbers 0 9 and special characters e g _ etc except the single quote ...

Page 45: ...ou want to change them you go to the Protection Firewall section of the Configuration Manager First log into the Configuration Manager as described in chapter 7 In summary you type 192 168 0 1 in the address bar of your browser go to that address enter the Username admin and Password motorola then click the Login button This will bring you to the Basic Status and Settings page Click the Advanced b...

Page 46: ...he desired protection level and click Save The higher protection levels will make it harder for attackers to penetrate your network You may find that if you select one of these levels that some Internet activities may fail If that is the case you may need to use a lower level of protection during those activities Note that in order to play some games you may need to turn protection off When enable...

Page 47: ...he Configuration Manager as described in chapter 4 In summary you type 192 168 0 1 in the address bar of your browser go to that address enter the Username admin and Password motorola then click the Login button This will bring you to the Basic Status and Settings page When the Basic Status and Settings page comes up click the Advanced button at the top right Remember that you can go back to the B...

Page 48: ...lect the Wireless Scan Bridge page Hover over the Wireless menu item to bring the Wireless submenu options into view then click the Scan Bridge submenu option This brings you to the Wireless Scan Bridge page ...

Page 49: ...sults table Note that as in these sample Scan Results you may need to scroll down to see all neighboring networks For the 2 4 GHz band Look at the Channel column This shows the channels that your neighboring networks use Available channels are 1 through 11 Many installations use only channels 1 6 or 11 because ideally wireless devices should be separated by 5 channels ...

Page 50: ...els 3 4 8 or 9 You may need to experiment to find the best channel Note good candidate channels to use for your network Then navigate to the Wireless Basic page For the 5 GHz band Look at the Channel column This shows the channels that your neighboring networks use Available channels include 36 48 and 149 165 As of this writing 2018 it is unusual for the 5 GHz band to be crowded If it is crowded i...

Page 51: ...Then select the desired channel from the Channel pulldown and click Save Wait for a minute or so for client devices to resynchronize to the new channel Check to see whether wireless performance has improved If not you can try another channel selection ...

Page 52: ...52 WiFi Multimedia WMM Another possible way to improve performance is to change WiFi Multimedia WMM settings From the Wireless menu click the WMM submenu ...

Page 53: ...53 ...

Page 54: ...es packet throughput with the trade off of higher error rates In many cases this can result in an overall improvement in performance Power Save Support is designed to support client devices with the Power Save feature The Power Save feature extends battery life by reducing power consumption However sometimes this feature results in suboptimal wireless performance You can turn Power Save Support Of...

Page 55: ...t allowing all others blacklists You can also set times where Internet access is allowed and not allowed To make Parental Control settings go to the Protection Parental Control section of the Configuration Manager First log into the Configuration Manager as described in chapter 6 In summary you type 192 168 0 1 in the address bar of your browser go to that address enter the Username admin and Pass...

Page 56: ...ave If you need to modify the Whitelists or Blacklists first Disable Parental Control and Save Then Enable Parental Control when the changes are complete and Save again To set up either a Whitelist or a Blacklist you will need to first find the MAC Address of the device you want to control On some devices this may be found on a label On others there may be a way to query the device to display this...

Page 57: ... had to change this Under the tab List of Blocked Addresses Blacklist click the Add button to the right A set of fields will appear Give your Blacklist a name and then type in the MAC Address of the device you want your Blacklist to apply to Use the format XX YY ZZ WW VV UU Next enter the URL of the first domain that you want to block for example BadSite com If you want to the Blacklist to apply o...

Page 58: ... an example entry to block access to BadSite com at all times Finally make sure to check the Enable box and click the Save button Click the sign to add another site to block for this device Now you can add another site for example WorseSite com to the Blacklist ...

Page 59: ...lick the Add button to the right A set of fields will appear Give your Whitelist a name and then type in the MAC Address of the device you want your Whitelist to apply to Use the format XX YY ZZ WW VV UU Next enter the URL of the first domain that you want to allow for example Jill _Site_1 com If you want the Whitelist to apply only during certain hours enter the start and stop times for the perio...

Page 60: ... device for example Joey s PC to the Whitelist First click the Add button Then enter the entry name device MAC Address site to allow and start and end time for the entry In the example below we have named the entry Joeys_PC and the site Joey_Safe_1 com with active time from 10 00 am to 2 00 pm Remember to click Save Click the sign to add another site to allow for this device ...

Page 61: ...61 Click the Add button to configure a Whitelist for yet another device if you like When you have completed all Whitelists remember to Enable Parental Control at the top of the page and click Save ...

Page 62: ...device only during hours that you specify Access will be allowed to all Internet sites Internet access will not be allowed to any site outside of the hours that you specify Under the tab List of Allowed Addresses Whitelist click the Add button to the right A set of fields will appear Give your Whitelist a name and then type in the MAC Address of the device you want your Whitelist to apply to Use t...

Page 63: ...er school period from 5 00 pm to 10 00 pm We have named the sample entry AfterSch Make sure to check the Enable box and click the Save button Click the Add button to configure a Whitelist entry for an allowed schedule for another device if you like When you have completed all Whitelists remember to Enable Parental Control at the top of the page and click Save ...

Page 64: ... and PPTP VPN pass through IPsec and PPTP are protocols used in different VPN implementations The pass through settings for both are enabled by default The most common type of VPN connection that MT7711 users will encounter is the type of VPN described above that simply needs to pass through the MT7711 The VPN pages support features that allow you to terminate VPN connections on the MT7711 itself ...

Page 65: ...65 To summarize the MT7711 supports VPN Pass through for clients connected behind the device that need to access for example a corporate network ...

Page 66: ...clients via PPTP L2TP The MT7711 can be configured as a VPN server in a small office or similar environment Clients located on the Internet can connect to the small office network through VPN tunnels terminated at the MT7711 ...

Page 67: ...7711 will NOT support termination of client VPN connections via IPsec A couple of notes about VPN options IPsec uses encryption and provides the strongest security PPTP is considered to be the least secure VPN option PPTP connections are not required to include encryption or authentication L2TP is based on PPTP and adds some level of compulsory authentication ...

Page 68: ...ne wrong if you have trouble setting up a VPN For details on how to configure a VPN on the MT7711 follow the help available through the information icons on the configuration manager pages When the MT7711 is configured as a VPN endpoint devices that connect to the endpoint will need to know the IP Address of the MT7711 You can find this address on the Status Connections page To provide the most st...

Page 69: ... Password first log into the Configuration Manager as described in chapter 6 In summary you type 192 168 0 1 in the address bar of your browser go to that address enter the Username admin and Password motorola then click the Login button This will bring you to the Basic Status and Settings page Select Advanced at the top of the screen and then Status and Security ...

Page 70: ...assword may include lower and upper case letters a z A Z and numbers 0 9 Special characters are not allowed Be sure to click Save to write your changes to memory Caution Once you make this change you will not be able to log into the modem if you forget the new Username and Password To recover you will have to reset the modem to factory defaults When you reset the device to factory defaults you wil...

Page 71: ...ur device to its factory defaults you will lose any changes you have made to settings in the device To reset to factory defaults 1 Make sure the cable modem router is powered on 2 Find the reset button on the rear of the unit It is marked RESET 3 Press and hold the Reset button for at least 10 seconds 4 The device will flash its LEDs and commence a reboot sequence Note that you will have to manual...

Page 72: ...ame admin and Password motorola then click the Login button This will bring you to the Basic Status and Settings page Click the Advanced button in the upper right This will bring you to the Status Software page Hover over the Wireless menu item and select the WPS_RADIUS_WEP submenu To enable WPA PSK follow these steps 1 Under 802 11n Mode Enable Disable select Disable from the pulldown 2 Find the ...

Page 73: ...n Generate WEP Keys 8 In the WEP Encryption pulldown select either WEP 64 bit or WEP 128 bit WEP 128 offers more security 9 Select Enabled on the Show Keys pulldown 10 Note the setting of Current Network Key This determines which Network Key you need to use on your clients You can change this value by selecting a different number in the pulldown 11 Click the Save button at the top of the WEP Secur...

Page 74: ... WPA PSK and WPA2 PSK respectively though sometimes they re just called WPA and WPA2 You can enable either WPA PSK or WPA2 PSK alone or you can enable both WPA PSK and WPA2 PSK together By default your Cable Modem Router has WPA2 PSK with AES encryption enabled You will only need to change the security mode if you have a device in your wireless network that only supports WEP or WPA PSK with TKIP e...

Page 75: ...K Security Settings tab If WPA PSK is Enabled select Disabled from the WPA PSK pulldown and click Save Note that WPA PSK is Disabled by default 3 If WPA2 PSK is Enabled select Disabled from the WPA2 PSK pulldown and click Save Note that WPA2 PSK is Enabled by default 4 Select Enabled for WPA2 Do not click Save yet 5 Enter the RADIUS Server Address and click Save 6 Enter the RADIUS Port and click S...

Page 76: ... that your coax cable is live You can check that by using it with a TV Check that you provided the correct setup information to your cable service provider Contact your cable service provider to make sure they ve turned on your Internet service What if I can t make or receive phone calls right after installation Make sure that you ve ordered Comcast Xfinity phone service Make sure that the Tel1 li...

Page 77: ... and connects to the home phone wiring What if my phone has no dial tone Make sure your phone is plugged into a Tel port on your MT7711 Check the connection both at the MT7711 and at the phone If your Xfinity voice subscription includes one line only make sure you have connected your phone to the Tel1 jack on the MT7711 The Tel2 jack will only work if you have a 2 phone line service from Comcast X...

Page 78: ...Check with your service provider Sometimes there s a service outage or some other service issue Sometimes a service outage also affects your TV service so check that What if I m getting Internet service but my speed is disappointing Be sure you know what speed you re paying for Check the speed with a computer using a wired Ethernet connection and plugged into one of the modem s Ethernet ports Use ...

Page 79: ...en that s not true The MT7711 is specifically listed on the Comcast Xfinity website as an approved device for Internet and phone services at mydeviceinfo xfinity com Other leading cable service providers have a list of certified cable modems for each of their Internet speeds You can check the list for your service provider You can also find information about certifications at www motorolanetwork c...

Page 80: ...etooth transmitters and neighbors WiFi routers 2 To try to pick a less used wireless channel for your MT7711 first go in to your MT7711 s Configuration Manager Then click the Advanced button at the top of the page then click the Wireless and Scan Bridge menu items at the top of the page Click the ScanWirelessAPs button A list will appear of competing wireless networks including the channels they a...

Page 81: ...also provides returns and warranty information www motorolanetwork com support Email support motorolanetwork com Phone 800 753 0797 or 617 753 0562 Limited Warranty MTRLC LLC warrants this product against defects in material and workmanship for a warranty period of 2 years To read the full warranty please go to www motorolanetwork com warranty ...

Page 82: ...ng measures reorient or relocate the receiving antenna increase the separation between the equipment and receiver connect the equipment into an outlet on a circuit different from that to which the receiver is connected and or consult the dealer or an experienced radio TV technician for help FCC Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an...

Page 83: ...reminder is provided to call the CATV systems installer s attention to Section 820 93 of the National Electric Code which provide guideline for proper grounding and in particular specify that the Coaxial cable shield shall be connected to the grounding system of the building as close to the point of cable entry as practical DC input connector is center pin positive polarity MTRLC LLC PO Box 121147...

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