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Solve : cable modems? |
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Answer» Comcast is the ISP / Presently using a RCA DCM425 cable modem using a USB connector to Dell E 520 desk top. The MAC address needs to be registered and recognized by your ISP. You may be able to use your own modem with Comcast. Call their customer services. Once you have got your modem registered with Comcast check your bill regularly to see they don't bill you for the rental (that is assuming they will even let you - if you have CDV service - Digital Voice - you have to use their modem, I think because they are liable for your 911 service) and also beware because if a service call is placed, the first thing they will demand is that you swap out the modem - as a troubleshooting pre-requisite prior to sending a technician out - or if they find the modem is bad, and its not theirs, you get charged for the call - not cheap, either. One way around that would be to buy two modems and keep one as a spare. Thank you for replies but the MAC address for the Motorola modem was registered and ACCEPTED by comcast JoeMotorola 6120 must use ethernet. Why must you use USB?You can use your own modem with Comcast. I'm staring at one now, and it's a Motorola.UPDATE When I open device manager / neither the RCA or Motorola modem are recognized when connected by ethernet cables. The RCA modem has both ethernet and USB port but it is recognized only when connected via USB cable. That would indicate a problem with my Dell E520 ethernet port. How do I T/S or repair? Thanking all In advance. JoeQuote from: joelevelis on January 16, 2011, 11:13:55 AM When I open device manager / neither the RCA or Motorola modem are recognized when connected by ethernet cables. This is normal. When connected by ethernet cable a cable or DSL modem is seen by Windows as a LAN (Local Area Network). It is only when the modem is connected by a USB cable that it will show up in Device Manager. Things to consider are 1. Whether you have used the correct Ethernet cable. There are two sorts of ethernet twisted-pair cable with 8-pin RJ45 connectors at both ends: (a) straight-through: where each pin is connected to the same pin at the other end; (b) cross-over: where pins (1,2) are connected to (3,6) at the other end, and vice-versa. For a normal stand-alone cable modem connecting to a normal ethernet NIC in a PC, you need a straight-through cable, because cable modem RJ45 sockets are normally wired as if they were hub sockets. Many cable modems are sold with an appropriate cable provided in the box. You can tell whether you have the correct cable because, when both cable modem and PC are powered up and operational, there should be LINK lights (usually green LEDs) lit beside the RJ45 sockets at both ends. 2. Whether your network settings are correct Review this page http://www.acmeteks.com/comcast.html 3. If your network adapter drivers are properly installed. Quote from: joelevelis on January 15, 2011, 10:29:24 AM ...Comcast help desk shows no modem installed... Quote from: joelevelis on January 15, 2011, 11:09:24 AM ...the MAC address for the Motorola modem was registered and accepted by comcast...These 2 statements are inconsistent.Quote from: Computer_Commando on January 16, 2011, 02:07:43 PM These 2 statements are inconsistent. The second one was made 30 minutes after the first; maybe, during that time, he was on the phone to Comcast? Maybe if he had written "the MAC address for the Motorola modem has now been registered and accepted by comcast..." it would have been clearer, but, hey, this ain't English class. Perhaps he will clarify? |
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