Question about RCA DCM425 DIGITAL CABLE MODEM (RCADCM425)

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Would like to connect a fax but only port 1 or (tel 1) port 2 does not work, should i send back to comcast or reset modem

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There is nothing wrong with your modem. Comcast charges extra for a second line. Depending on your model of fax machine, there should be both an input ond an output on the back of the fax machine. Plug the fax machine into line 1 on the modem. Then, plug your phone into the input on the back of the fax machine. If you fax does not have both in and out, then you can purchase a "Y" phone line adapter from your local electronics store.

ps. VoIP is a digital line... Facsimiles are analog signals... Sending analog signals over digital lines is not recomended. If you are wondering "why?" (and understand tech jargon) VoIP is sent via UDP, which is a connectionless protocol (does not retransmit dropped packets) Fax machines use TCP, which does resend dropped packets. This variance in Qualiy of Service sometimes cases strange activity such as both lines (sending and receiving) dropping connections, faxes taking a long time to transmit (due to constant resending loops), etc. It does work... kind of. I would just not assume that faxes made it to their destination until it gets confirmed.

Posted on Dec 31, 2010

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First check with your ISP (Internet Service Provider) to see if it's just a setting in the modem they can activate the port for your FAX

have fun!

Posted on Dec 31, 2010

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1.call comcast and ask them to put your modem on bridge mode.
2. Once the modem is on bridge mo the internet light will turn OFF
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Since you have a DSL ( Digital Subscribers Line ), the HP Fax printer works on Analogue Signals.

To make the GP Printer work on Digital line, First step you can do is to Reduce the Fax Speed from Fast/Medium to SLOW.
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Simple:

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* one telephone-wire from port labelled "phone" (or an icon of a telephone) to the port on your computer's modem labelled "tel" or "telco" (if your modem has more than just one port).

So, "incoming" telephone-calls go the FAX, to be "answered" by the FAX, while "outgoing" dial-up-Internet connections from your computer's modem "pass-through" the FAX, and to to the wall-port, and further along to the Internet Service Provider.

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1. Reset your Comcast Surfboard Cable Modem by unplugging it for 5 minutes.

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4. Turn on Comcast Surfboard Cable Modem and wait until all lights are on. Now plug in a cat5 cable from the Surfboard Comcast modem (NOT A CROSSOVER CABLE LIKE THE CD INDICATES) to the INTERNET port of your DLINK Router. Now turn on your DLINK router.

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follow this simple steps:

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3. connect the phone cable or cord that came with your telephone line to the back of the printer port that says "2-EXT" and the other end to the back of your telephone ..

This should solve the problem..best of luck

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Connection


Hi Susie
With related to your particular issue it seems like that your broadband modem is not configured for the router. There are basically 2 types of connection. DSL and Cable modem. Verizon, ATT are DSL and comcast other providers give you a normal cable broadband connection. If its comcast make sure the cable from the comcast modem is going to the internet port in the linksys router and also make sure that there is a system connection the linksys router and the cable from the system goes to any of LAN 1, 2, 3 and 4 ports. Then reset your cable modem by using a pin and inserting to the reset hole in the modem. You could use the same step to reset your linksys router as well .If its a verizon or dsl connection you need to put normally your username and password in the router page. here is the link to how to configure linksys for your internet modem.
Here is a video as well on it?
http://in.youtube.com/watch?v=vSAXMO7aNzg

http://tinyurl.com/5tqqhl


Also post the linksys router model. your ISP modem model number and also information on how many systems are wired to the router and wireless and let me know if you need more help.

Thank you
Rakesh
Dell Laptop Expert

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1 Answer

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1) Take a regular phone and test the line
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Start >> Control Panel >> Modem

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2 Answers

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