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To answer your question: Your phone has lost connection to the VOIP network. These types of phones use DHCP to assign an IP address to themselves from your VOIP network, usually by means of a switch or router. When they lose connection to this switch or router, they cannot communicate with the VOIP network and load their network environment, called PXE. This in turn loads the phone. Try replacing the patch cable on the phone between the phone and the wall. If that doesn't resolve your issue call your Telcom Specialist who installed the VOIP Network. He will need to test the phone, switch, Firewall, and VLAN to make sure the phone hasn't died or his configuration hasn't been hosed in the router or VLAN. He may also need to reset his VOIP box.
I want to make sure I understand this completely. You get no dial tone from the fax machine when hooked up to VOIP. In the past, was there an audible dial tone from the fax, or did it just dial silently and give you an error if there was no tone?
When you said you got a dial tone by connecting a phone to the ext phone port of "the machine" did you mean the fax machine? If you get a dial tone by running a phone through the fax machine, then the line is good. I have used a fax machine over Sunrocket before they went defunct, which used the same technology base as Vonage - so it should work.
If you used to get an audible dial tone when using the fax, and no longer do, and you are geting a dial tone on a regular phone that is connected to the ext. port of the fax machine, then the problem has to be in the fax machine itself, not the VOIP.
If you can verify that, we can go from there.
If you are having trouble connecting to the internet, please try these steps.<br /><br />1.Unplug the power to your modem. This is the box from your cable or DSL provider. <br /><br />2.Unplug the power to your VOIP phone adapter. If you don't have one skip this step. <br /><br />3.Unplug the power to your router. Wait 45 seconds, then Plug in your modem and wait for lights to stabilize on a specific pattern. (Usually takes about 1 minute) <br /><br />4.Plug in your VOIP phone adapter (if you have VOIP service) and wait until you have a dial tone on your phone again. If you don't have VOIP or know what VIOP is, skip this step.<br /><br />5.Plug in your VOIP phone adapter (if you have VOIP service) and wait until you have a dial tone on your phone again. If you don't have VOIP or know what VIOP is, skip this step. <br /><br />You may need to restart your computer for this to work :)<br />
In your VoIP monitor settings there are two options to make your phone connect to voip. You either have to dail # # or # *. I would try hitting pound twice, but it's kind of tricky because sometimes when the dlink tries to connect it will flip back and forth between voip and pstn. So I recommend holding the phone to your ear and hitting # until you hear that dial tone!
Please make sure that you're credentials are correct and properly configure in your VoIP box. Forward UDP ports used for VoIP. This would be the basic steps to ensure you get proper dial tone from your Intenet Telephne Service Provider.