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Let’s admit it, Optimum ranks among the most reliable telecom service providers in the US. Spanning 21 states, Optimum is a top favorite provider for millions of households in the United States. So, whether you have subscribed to Optimum Internet or TV plans, rest assured of its excellent service quality and network stability around the clock.

However, that certainly doesn’t mean that you’ll never face any disruptions with Optimum services. Once in a while, there may be events when you encounter some glitches in your service. One common example is Optimum error codes!

Just in case, you are an Optimum user and you’ve been getting different types of errors lately, then this guide is all you need. Below, we will guide you on how to fix Optimum error codes for cable boxes. So, let’s get started!

Optimum Error Codes

Optimum has lots of different error codes with accompanying messages that are not clear to most users. While some are pretty straightforward, others do not clearly indicate the problem you may be facing. These error codes are usually a result of hardware issues, streaming devices, system-wide glitches, and poor connectivity.

There is a whole list of frequent error codes that Optimum customers may encounter at least once during their service period. Each of these codes represents something in particular. By learning what they indicate, you can resolve the issue instantly without any hassle. No more stress about how to fix Optimum error codes! 

Below, we have come up with a detailed guide on top ten Optimum cable box error codes, along with their possible causes and solutions. Let’s take a look!

Error 200: Physical Network Connection Failure

This error means that your physical network connection — the cable that connects your modem to the internet — has failed.


Error 200 usually occurs due to poor cable connections, such as loosely connected or damaged modem wires.


First, closely examine the cables/wires attached to your modem to check for any possible causes. If cables/wires are frayed or damaged, fix them.

If the issue still persists, then you need to get cables/wires replaced. For this, buy a new coaxial cable and replace the old, damaged one. If even doing that doesn’t help, reach out to Optimum Customer Support for guidance to troubleshoot connection issues.

Error OBV-005: Cable Box Unable to Receive Internet Signals

This is the “no proper internet connection in the particular cable box you are using” status.


OBV-005 is a connection error, which occurs when your cable box cannot connect to the network. While this sounds terrible, it is usually just a WPS issue.


When you see this code, the first thing you should do is check if the cable box is plugged into the correct port on the router. Make sure that you turn off the cable box completely before plugging it in again.

If the WPS issue seems like the culprit, then reboot your boxes. Here’s how you can do this:

  • With the modem/router powered on, press and hold the reset/WPS button for 5 seconds.
  • Release it and wait for your device to restore to its default settings.
  • If you have multiple boxes, reset all of them as well.
  • On the main box, hold the WPS button for 5 seconds.
  • Watch your boxes pair up again.

Need more information?

Reach out to Optimum Customer Service at 844-520-8978 now!

Optimum Error CUC (Cisco Unity Connection): Signal Error

A Cisco Unity Connection (CUC) error generally indicates that there is a weak or no device signal.


There could be multiple reasons that cause signal instability or disruption. However, the most common reasons are that there is no stable connection to the specified network, or there’s signal interference in your surroundings.


The best solution for the Optimum CUC error is to perform a factory reset on your cable box. Here’s how you can do it:

  • Start by disconnecting your cable box from the electric outlet or the box itself, whichever is applicable.
  • Let the device remain disconnected for five seconds and then reconnect it.
  • You will see a hold on your cable box followed by a turn-on while it is being reset.
  • As soon as the time appears on your cable box’s front panel, the resetting of your device will be finished.

Error NW-1-19: Netflix Network Connection Problem

This one is best known as the Netflix error code that indicates your connection to the internet has been lost.


NW-1-19 error code occurs when there’s a problem with your network connection. The culprit may be your internet connection or the device that you are using to connect to the Netflix service. This is preventing your device from accessing Netflix servers.


Here is a list of things you can do to fix this error:

  1. Restart your devices — Smart TV or Streaming Media Player — to remove the current state of its software and app. And sweep away any activity that is causing the Netflix app to misbehave
  2. Restart your modem and router. Simply remove the power from your home networking equipment, wait for 30 to 60 seconds, and then plug everything back in.
  3. Check your internet connection. Use any other internet-enabled device. If that device can connect to your network, then your internet connection is fine. If that’s not the case, you may want to check with your ISP for service-related issues.

Optimum Err-22: Channel Temporarily Unavailable

Optimum Err-22 usually pops up when any TV channel is temporarily unavailable in your region.


Most of the time, Optimum Err-22 occurs when the provider isn’t temporarily broadcasting the channel in your area, or the box timed out while waiting for the stream to start.


  1. Check your TV and cable box’s cords and cables. Ensure that all your wires are properly connected with no loose ends.
  2. Restart your cable box. Simply unplug your cable box for about 30 to 60 seconds, and then plug everything back in.
  3. Once you are done, switch to the same TV channel again and check if the error has disappeared.
  4. If you still see the error, please reach out to Optimum customer service at 844-520-8978 and get support from trained professionals.

Optimum Err-23: Altice Box Unable to Receive Reception

One of the most common errors you see is Err-23, which means your Altice box is not receiving signals from the mainline.


This error can be due to a large number of reasons, like out-of-date drivers or loose cables. So you need to troubleshoot it quite thoroughly.


The first thing you should do is flip your device over and make sure all of its wires are connected properly. Also, check if all the wires and connections are in the right ports.

If that doesn’t work, check all of your other connected devices. If none of them is working, the problem is from your ISP’s end. In that case, reach out to Optimum customer service at 844-520-8978 and connect with its trained professionals. They will provide you with a broader understanding of how to fix Optimum error codes instantly at home!

Optimum OMS-016: HDMI Glitch

In this error, an alert box appears on your screen along with a message, “ALERT: There is a problem with your HDMI connection. Please check your connection and call customer service, if the issue persists.”


Optimum OMS-016 error usually occurs due to HDMI connection or cable issues.


  1. Unplug your HDMI cord, and keep it disconnected for about 60 seconds.
  2. Now, plug everything back in and switch on your TV.
  3. Check if the OMS-016 dialogue box is still appearing on your screen.
  4. If yes, then it might be an issue on your service provider’s end. In that case, please reach out to Optimum customer service at 844-520-8978 and seek professional help.

Error Code 106: Unavailable Server/ Slow Internet Speeds

Although common, error code 106 can be a little complicated to figure out. This is because it can occur due to various possible reasons.


This error usually occurs when the server you’re trying to connect to is unavailable. Or the internet speeds you are getting are too slow.


Wait until the server traffic eases up and you can access it. After that, try to connect again to see if it works.

Check your internet performance by either taking a speed test or connecting it to other internet-enabled devices. If it is not up to the mark, try moving your devices closer to your router/gateway, so that they can get the best possible signals. Plus, make sure there are no obstacles, like metal objects, brick walls, electronic equipment, etc. blocking your router or gateway. This way, you can make sure there are no signal interruptions taking place.

Error Code OBV-055: No Proper Connection to the Network

You'll likely see the message if you are using the Optimum cable modem and Altice router. It usually means there’s no stable connection to the set network.


This error can occur due to several reasons, like software bugs, faulty cable connections, and more. So, it is hard to say for sure what exactly is causing it.


First, make sure your device is getting a stable internet connection. Double-check it by connecting other internet-enabled devices to the same network. If you don’t find any connectivity issues, then your internet service provider is definitely not to be blamed.

Next, check all the cable connections on your devices, and make sure they’re all connected properly. If you have any extra cables attached to your router or modem, remove them. This should work!

If that still doesn’t fix the issue, the final step is to restart your whole network. The trick is to keep it powered off for at least 15 minutes before starting it up again for a smooth reboot.

Optimum 0x00: Faulty Hardware/Maintenance Needed

This error indicates that your cable box’s hardware isn’t functioning optimally.


This error occurs when your hardware has become faulty/damaged or needs maintenance.


Error 0x00 pops up due to technical issues in your cable box’s hardware, which is why there’s only one solution to this problem. Reach out to Optimum customer service at 844-520-8978 and book a technician’s appointment. Optimum’s expert technicians will find out the root cause of the problem and let you know if you need equipment replacement or simply repair.

Sign Up for Optimum Services Today!

To check availability in your area, call 844-520-8978.

There You Are!

We hope this article helps you resolve any and all annoying Optimum error codes. The formula is simple with most of these — check your internet performance, tighten all your cable connections, or restart all your devices.

That said, Optimum takes its subscribers seriously, which is why all Optimum services are designed to suit the diverse needs of customers. The provider strives to ensure its users get the best quality service no matter what! So, whatever problem comes your way, Optimum customer service staff is always ready to help.

Dial Optimum phone number i.e. 844-520-8978 to speak to a professional. For services in Spanish, call 844-527-5633. Rest assured, you will always find Optimum Customer Service at its best!

Frequently Asked Questions (FAQs)

What Does CUC Mean on Optimum Cable Box?

A Cisco Unity Connection (CUC) error generally indicates that there is a weak or no device signal. There could be multiple reasons that cause signal instability or disruption. However, the most common reason is no stable connection to the specified network or possible signal interference in your surroundings.

For more information, please reach out to Optimum customer service at 844-520-8978.

What does DAL Mean on cable box?

Direct Access Line (DAL) refers to a network arrangement that transmits data and serves as an exchange network between the server and the user.  

How do I troubleshoot my Optimum cable box?

Troubleshooting your Optimum cable box is easy – simply turn off your TV and unplug your cable box from the electric outlet. Keep it unplugged for about 5 seconds, then plug it back in. While your device is rebooting, you will see a "HOLD" appearing on the screen followed by "TURN ON". This may take up to five minutes.

For more information, please reach out to Optimum customer service at 844-520-8978.

Does unplugging a cable box reset it?

Yes, unplugging a cable box resets the device, as it starts the reboot process in most cases.

Learn More About Optimum Internet

James Chadwick

James Chadwick has proved himself to be a great help to the residents of Hawaii in their search for the best internet services. His expertise in writing along with his knowledge of the provider has resulted to become a marvelous combination of detailed insights. He has an eagerness to troubleshoot tech-related problems, as well as enjoys writing detailed how-to guides for Hawaiian Tel subscribers. He also has experience working closely with providers like DIRECTV, AT&T, and Spectrum. James works closely with a team of excellent content writers to help generate the most valuable content for our readers.