Cable Modem
How do you narrow down a connectivity problem to the cable modem?
The ISP said it was probably a faulty Network Card so I replaced the on board NIC with a brand new PCI card. The cable is definitely good because I tried a few different ones. The internet quit working a week ago, then started working again for a few days and now doesn't work again. Would this have to be a bad modem or something on the ISP side or am I missing something else to check? I also tried hooking up my laptop to the modem and it still did not work.
It keeps saying "acquiring IP address" and then it says it cant find a connection.I already tried repairing the connection and unplugging the modem for a little while. There is no router installed so wireless has nothing to do with it.
ISPs are notorious for blaming customer connectivity issues on the customer premise equipment (CPE), but not proving their equipment/infrastructure good. Request a detailed explanation, and don't be intimidated by their "techno-babble." Ask for detailed troubleshooting steps that leads them to fault CPE.
When troubleshooting connectivity issues, the command line is your friend. While directly connected to your cable modem, using the command line ("cmd" for Windows OSs and the console for Linux) to do the following:
1. Find out if you have been provisioned an IP by running "ipconfig /all" in Windows and "ifconfig" for Linux. Write down your IP address and subnet mask, your default gateway, and your DNS and DHCP IP addresses.
2. Ping 127.0.0.1 (verifies your machines IP protocol installation), then ping your local machine's IP (verifies your local machine NIC.)
3. Ping your default gateway (verifies the rest of your local network to the ISP network.)
If any of the above pings fail, that is the piece that needs to be replaced. For instance, if the first ping fails, you might need to reinstall TCP/IP on your local machine...the second means that your NIC needs to be replaced, the third indicated a fault with your cable modem.
Also, if you can ping to the DHCP or DNS server, this indicates that your CPE is working properly, and the ISP needs to take a look at their infrastructure...call them and tell them which IP isn't pingable, or if your pings are inconsistent.
Hope that helps...
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Enjoy Wireless Connectivity to the Internet With 3G Modem
Modem, a term derived form Modulator-Demodulator used to stand for a device that allowed a computer or terminal to transmit data over a standard dial-up telephone. This description of a modem is inadequate and was suitable only until the late 1990s. Since the advent of high-speed cable and DSL connections, modem now refers to devices that offer low-speed dial-up or high-speed broadband. Taking technology one step ahead, the wireless 3G modem provides global wireless access to the Internet and e-mail.
USB wireless 3G modem creates connection of computers and private networks with the Internet as the primary or back-up route. It is especially suitable for desktop users seeking permanent wireless Internet connection and users in rural areas where no other means of broadband Internet are available. It is also equally suitable for users on the move who want to take their connection with them all the time.
As mentioned above, the wireless 3G modem provides global wireless access to the Internet and e-mail on HSDPA (High Speed Downlink Packet Access) capable UMTS networks. With a speed of up to 1.8Mbps down and 384kbps up, it enables users to enjoy access to wireless connectivity similar to DSL or cable modems. In addition to supporting high-end HSDPA technology, the wireless 3G modem is also compatible with UMTS, EDGE and GPRS networks.
This capability of the wireless 3G modem makes it an ideal device for operators planning to upgrade their networks to HSDPA as it supports currently deployed wireless broadband technologies (WCDMA 2100MHz, EDGE Class 10 Quad band). By virtue of this technology, you can get access to the Internet using your 3G mobile phone as a modem by simply connecting your handset to your PC with a USB cable. What more, while you are browsing the net, you can still use your 3G mobile to make and receive phone calls or send and receive text messages.
About the Author
Dennis Jaylon is a renowned business writer who has years of experience in writing technical reviews, product descriptions and product feature analysis of technical gadgets and gizmos. He has won appreciation especially for enlightening people about the latest communication gizmos...the 3G modem