Installation Troubleshooting Glossary License
Top and Front Panel
For added security you can press the Standby button (1) to suspend your Internet connection. No data is transmitted or received from the Internet when the Standby light is on. All other
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The model number on your VoIP cable modem may be different than in the illustrations and screen images in this guide.
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TEL | 1 |
TEL | 2 |
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SURFboard | |
Cable Modem |
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The lights provide information about power, communications, and errors:
Key | Light | Flashing | On |
2 | Power | Startup diagnostics in progress | The VoIP cable modem is powered on. |
3DS (downstream) Scanning for a receive (downstream) The downstream channel is connected. channel connection
4 | US (upstream) | Scanning for a send (upstream) | The upstream channel is connected. |
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| channel connection |
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5 | Online | Scanning for a network connection | The startup process is complete. |
6 | Link | Transmitting or receiving data | A device, such as a computer or hub, is connected to |
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| the USB or Ethernet connectors on the back panel. |
7 | Tel 1 | Connected and activated, | Connected and activated, the telephone is |
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| telephone is | (not in use). |
8 | Tel 2 | Connected and activated, | Connected and activated, the telephone is |
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| telephone is | (not in use). |
9 | Standby | This light does not flash | Internet service is blocked because the Standby button |
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| was pressed. If this light is on, all other lights are off, |
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| except for Tel 1 and Tel 2. |
During normal operation, the Power, Receive, Send, and Online lights are on and the Link light flashes when the VoIP cable modem is transferring data.
SBV5121 VoIP Cable Modem User Guide | 3 |