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This FAQ text is copyright dslreports.com
Reproduction of all or part only with our permission..
This FAQ is edited by: Lex Luthor See Profile, tmpchaos See Profile, drake See Profile
It was last modified on 2014-01-11 17:28:54

0.0 Forum Info

I have an issue with my connection. What info should I post?

Use the "New Topic" (also, see here) toggle-link in the forum's header to create a new thread. Your thread title and post should be detailed and accurate as possible. Try to avoid thread titles, such as: "helpppppp me plzzz!", or "i have a question" - those titles do not attract the right amount of help. With the proper tagging, you'll receive assistance from someone in a reasonable amount of time. :-)

For your post, you should include the following:

    1. Describe your issue in detail, including any troubleshooting steps you've taken on your own, so far.
    2. Where are you located? (this helps to assume if there's an area outage/issue that others can relate to)
    3. What's your service level with Optimum Online (e.g. regular; Boost; Boost+; or Ultra)?
    4. What cable modem are you using; and do you have a router - if so, which one?
      4a. Measure your connection speed using one of the speedtests given here.

By answering these initial questions, you avoid "beating around the bush" and receive detailed responses.

Do not post any sensitive account information in the public forums (e.g. phone number; address; modem MAC address, etc.)

Who hosts the Optimum Online forum and FAQ?

DSLReports.com is a private operation website, along with all forums within, which includes the »OptimumOnline forum. This forum is in no way affiliated with Cablevision Systems. However, there are several techs and official support from the company present on the site; please click here.

If you have an inquiry regarding forum operation, please contact your forum host/moderator, Lex Luthor See Profile.
And, as for your FAQ editors - contact tmpchaos See Profile; or myself, drake See Profile.

0.1 Official Tech Support

Does Cablevision provide support via DSLR?

Yes. We have easy access (for registered BBR members) to »Optimum Direct . This is a secure venue, where OOL techs can see all threads, but users can only see their own threads. A user can therefore post their account information as needed in safety.

--> Who are the official Optimum Online techs on DSLR?

Who are the official Optimum Online techs on DSLR?

These Cablevision employees are official support from Optimum Online's tech department.
If you need direct assistance, please post in the Direct forum provided here at the site.

ooltech See Profile
wilth See Profile
Engineer88 See Profile
rspanbauer See Profile

If you are an tech from Optimum services, and would like to show your presence here on the forums, officially - please contact tmpchaos See Profile, or Lex Luthor See Profile for further procedures, and to tag your account with VIP status.

1.0 General Questions

Can I use my modem at another location?

OOL validates paid service by using the MAC address of the modem.

If you have a modem that has its MAC address registered with OOL, it should work anywhere in OOL territory (as long as there is no filter on the line and OOL service is available at that site).

That being said, you may very well be violating your TOS and doing this might subject you to service cancellation.

How can I tweak my connection?

For Windows operations: any OS (e.g. WinXP; Windows 95/98) pre-dating Windows Vista and Windows 7 should seek tweak assistance from the »Broadband Tweaks forum.

Microsoft has implemented what we call "auto-tuning" for Windows Vista and Win7, which means there's no RWIN tweaks available. The system automatically adjusts the tweak values based on speed, latency, and so forth, to stabilize your connection.

Mac operations: see --> »All Things Apple forum.

Can you please explain kilobits vs. kilobytes?

It will make it easy if we all try to stick with the industry standard abbreviations.

Kilo-bytes per second = KB/s
Kilo-bits per second = kbps

Your browser reports speeds in kilobytes (or megabytes) per second when you're downloading or uploading data.

1 kbps = 1000 bps (bits per second)
1 KB/s = 1024 B/s
1 KB/s = 8.192 kbps
1 kbps = .1221 KB/s

KB/s to kbps
    Take KB/s and multiply by 8.192
        100KB/s = 819.2kbps

kbps to KB/s
    Take kbps and divide by 8.192 (or multiply by .1221)
        1000kbps = 122KB/s

Your browser reports speeds in KB/s, so if you see 500KB in your browser, your speed is 4096 kbps or 4.096 Mbps (megabits per second).

Try this speed calculator to help with any conversions.

See this FAQ for variety of speed tests -->
»Optimum Online FAQ »How can I test my speed?

What are the email addresses for contacting OOL?

The following addresses should be used based on the issue you are trying to resolve-

Can I run a server on OOL?

First of all, running any server or abusing bandwidth are both violations of the Optimum Online Terms of Service (TOS). OOL is within their rights to terminate their agreement with you if you are caught running a server or abusing bandwidth.

While running any type of server is a violation of the TOS from a strict legal standpoint, the reality of it seems to be that it's the bandwidth usage (mainly the amount you upload) that OOL is most concerned about. If you keep the bandwidth usage "normal", OOL will most likely not have a problem with your server. That is just my opinion and is not OOL corporate policy.

In addition, if you are trading copyrighted materials over your OOL connection, OOL could terminate you for a TOS violation and could be under legal obligation to identify you to appropriate authorities in court-order situations.

Optimum Online Service is provided to subscribing households for non-commercial use. Running a server for commercial purposes is a violation of the TOS and can lead to your agreement being terminated.

If you do decide you want to run a server, at your own risk, I would suggest that you keep an eye on your bandwidth usage (again, mainly the upload usage).

Some of the more popular types of servers include, but are not limited to, Web/HTTP servers, FTP servers, SMTP mail servers, P2P file sharing programs, etc.

The most common server used is probably P2P file sharing (such as "Kazaa"). If you use P2P software, use it wisely.

Many of today's server programs allow you to set bandwidth limits. When you find the program's option to limit the bandwidth, I'd suggest setting the maximum upload speed to somewhere in the 16-18KBytes/sec (128-144kbps) range. Please make sure that if the program asks for the number in KBytes/sec, you enter it in KBytes/sec and if it asks for it in kbps, you enter it in kbps. You could easily wind up allowing 8 times more bandwidth then you intended for if you do it wrong. For a bits vs. bytes "tutorial", click here.

Depending on the type of server, I'd also suggest not running your server 24/7. If you are not at the computer actively using the server, perhaps you'd want to shut it down.

In some cases, OOL has capped the upload speed to 150kbps for people they feel are abusing the system. You can call technical support to have the cap removed. It's unknown how many times OOL will uncap you, should you get capped multiple times.

What ports are currently blocked by OOL?

Ports blocked & level of service required to open:

Ports 25 & 80 - opened with boost/boost plus/ultra
Ports 8080, 1043/1080/3128 - opened with boost/ultra; and static IP business accounts only
Ports 135-139, 445 - currently unable to be opened

[thanks to amaiman See Profile and frdrizzt See Profile]

I'm a former Bresnan customer, now Optimum West. What should I know?

There's currently a sticky thread in the Optimum Online forum regarding the acquisition:
»Welcome former Bresnan now Optimum West customers

Once you've migrated over to Optimum West (ex-Bresnan systems), you'll be subject to everything Cablevision, including the services provided, depending on your area. And yes; the FAQ entries provided pertain to you as well.

If you have any trouble with your services, please start an detailed thread in the public Optimum Online forum, first; then pursue in the »Optimum Direct forum, if necessary.

Where can I find the CV Terms of Service (ToS)?

1.1 Availability & Pricing

When will OOL be available in my area?

OOL personnel here have to avoid doing serviceability research for the DSLR community because in the past they have found that the information they can gather is usually no better than what is publicly available on the OOL Availability Lookup Site, doesn't help make the construction any quicker, and takes significant time away from their jobs and the jobs of those they must contact. Also, if the construction schedule were to change, you would be disappointed and their credibility would suffer. It's also very easy for them to get a date from one department, only to find later that another department has required work that will change the date.

In other words, you'll get the best information by visiting the OOL availability Lookup Site. You might also be able to get availability by escalating through the support phone channels.

OK, I'm interested. How do I register for Optimum Online?

You can order service through Optimum's website, which they have a variety of offers between double play (2 out of the 3 service offerings) or the popular triple play bundle. Each have their own value. But, you can also order Optimum Online solely (call it 'single play', if you will?).

You can also order by calling directly using one of their regional telephone numbers.

Cablevision only provides their Optimum product to their territories (selected NY, NJ, CT and also ex-Bresnan areas).
So, for example - if you're located in a Time Warner Cable area, you cannot switch services (between two cable operators at the least) as cable operators do not normally overlap Cablevision territories and vice versa.

What's Cablevision's pricing for Optimum Online?

Standard service for Optimum Online is $44.95 per month with iO services; or $49.95 per month without iO service.

Cablevision has a set of pricing arrangements and bundles (e.g., triple play; double play) available here.

Also, see this FAQ for the bandwidth breakdown of each tier Cablevision offers.

Optimum West customers (ex Bresnan subscribers)
Please see this FAQ for additional info on special packages provided by Cablevision for Optimum West.

1.2 Speed

What speed tiers are available?

Optimum Online | 'standard': 15 Mbps downstream; 2 Mbps upstream
Optimum Online | 'Boost': 30 Mbps downstream; 5 Mbps upstream
Optimum Online | Boost+: 50 Mbps downstream; 8 Mbps upstream
Optimum Online | Ultra: 101 Mbps downstream; 15 Mbps upstream

Cablevision no longer caps their subscribers, in any way.
However, those looking to operate servers, please see this FAQ entry: »Optimum Online FAQ »Can I run a server on OOL?

[submitted by frdrizzt See Profile]

How can I test my speed?

At the top (or left side) of the forum, you'll see three speed test links.

»/speedtests (Our own set of tests-flash or java)
»www.speakeasy.net/speedtest (speakeasy tests- flash)
»speedgauge.optonline.net/speedte ··· eedtest/

The OOL FTP speed test will begin a 64MB file download, while the other 2 sites use a web application.

There's a reference to NDT-based speedtest servers - see FAQ:
»Optimum Online FAQ »What is an NDT speed server and why should I trust it?

I am getting slow speeds in peak hours. What can I do?

Slow download speeds in peak usage hours which improve in off-peak hours are usually caused by congestion in the Optimum Online network, either at your Node or at one of the upstream / edge routers.

First of all, check to see that this is actually the problem causing your decrease in download speed. If your speeds are slow regardless of time of day, then you probably have a different problem, and should try posting in the »OptimumOnline forum, but follow through this FAQ first!

Cablevision has alleviated most speed congestions with the deployment of DOCSIS-3 (or D3 as we sometimes abbreviate), which allows a D3 certified modem to bond several channels to balance the load in the event of an congestion and to increase bandwidth distribution.

RARPSL See Profile and TheWiseGuy See Profile sums up the deal with D3 and their bonding techniques - »[OOL] DOCSIS 2 vs DOCSIS 3 modems

If you are still seeing slowdowns in peak hours, you will need to find some way to convince those who can fix the problem that there actually is one. Essentially, you want engineering to split your node or otherwise re-arrange OOL's network so as to eliminate the peak-hour overloading.

Here's a theory on collecting info from the area for network congestion, by spidey3 See Profile:
said by spidey3:

One way to do this is to survey your neighbors to see if they are also having the problem. Start by asking your closest neighbors. If you are in an apartment building, you could, for instance, post a note by the mailboxes, with a check-box for people to indicate their situation. Also contact any other neighbors you know, even those who are just acquaintances. If you are the outgoing type, you could do a more general canvas, I suppose. The more people you ask the better -- but you don't need to survey the whole zip code.

As for node boundaries, it doesn't really matter if you get responses from people who aren't on the same node. And you do not need to include responses like "my speed is fine" in your list -- just include the list of those who have complaints. Although, if everyone in the area is saying that their speeds are fine, then you may want to reconsider whether there is actually some other problem specific to you.

Once you have your list, call customer service and politely explain the situation, "My neighbors and I have been having slow speeds in peak times, and I was informed that providing a list of affected OOL users in the neighborhood would be helpful to you in diagnosing the problem". If the support person isn't immediately helpful, ask politely to speak to second level support, and repeat your story. Don't forget to offer to fax or email the list of affected users, and always make sure the first thing you do when speaking to anyone at customer support is ask their name and position, and record this information.

Regardless of whether you manage to get customer support to accept your list, you should get them to roll a truck [send a technician to your home]. Politely explain the situation, presenting the list to the technician who shows up. Let them run whatever tests they wish to run; you will need to prove to them that the problem is not in your own system. Do not get confrontational; just politely insist that they call in and convey the situation up the chain of command. Try to get the supervisors name and telephone number. Make sure you have a printed copy of the list that the engineer can keep, and insist that they physically attach the list to their copy of the trouble ticket before you sign it. It is important to sign the ticket, and that it indicate that the problem was not inside your home, because otherwise they may charge you for the visit.

Always remember that the whole purpose of this exercise is to get a list of OOL customers with speed problems into the hands of the people who can actually fix the problem -- the engineers in the local office. And keep in mind that if you act politely and professionally throughout the process, so will they.

I don't guarantee that this will work every time, but I have seen it work in the past. It is definitely worth a try.

What is an NDT speed server and why should I trust it?

An NDT [Network Diagnostics Test] server runs on a much faster connection than the usual Speakeasy and DSLR speed tests.

These servers support a Web100 linux kernel as part of the Net100 project to make a network aware OS.

If you try the various Web-100 tests around the country which run on very well connected servers, you should see your actual speed or close to it [these testers are good to 100 Mbps and beyond.]

The Web100 kernel is optimized to run speed tests on a very fast connection. Data shows you various TCP kernel variables for the transfer from the test server to your client applet.

Your browser's "Java console" may provide additional clues. You may also need to upgrade your browser's java run-time environment (JRE) from java.com; you should be running Java Run-time Environment Version 5.0, at least.

To date, Update 6 is the latest version of JRE:

»www.java.com/en/download/ie_auto ··· auto.jsp [MS Internet Explorer]
»www.java.com/en/download/windows ··· _xpi.jsp [Firefox]

Many users especially 15 Mbps/2 Mbps upgraded areas and 30 Mbps/5 Mbps BOOST users prefer these tests.

NDT Tests

• »web100.rit.edu:7123/ (Rochester, NY)

• »jlab4.jlab.org:7123/ (Newport News, VA)

• »ndt.anl.gov:7123/ (Argonne, IL)

• »netspeed.stanford.edu/ (Palo Alto, CA)

• »nitro.ucsc.edu/ (Santa Cruz, CA)

• »speedtest.umflint.edu/ (Flint, Michigan)

• »whisper.cs.utk.edu:7123/ (Older version of the NDT tester)

1.3 Installation

2.0 Hardware

USB or Ethernet: which should I choose?

Ethernet connectivity would be the top option for most broadband users in reference to connecting a computer or router to your cable modem. There are several reasons, and this FAQ will explain the most prudent factor(s).

Using USB is typically useful for connecting a printer or some other external device (Plug N Play) to your computer, or network, in general. However, the amount of devices used with USB utilizes resources more and more with usage, which can show a significant performance degradation.

The end game discretion: ethernet (megabit and gigabit networks) will always exceed the bandwidth limits of USB, especially the today's broadband and internal network growth and market.

What coax splitter should I use?

If you have iO and Optimum Online, you may need to split your main CATV line that drops from the pole or underground. Although a direct drop (dedicated coaxial line for OOL) is best for OOL, it is not always possible or cost effective.

Your OOL connection to your cable modem is best achieved by splitting the signal at the first splitter. You will need a good quality splitter rated at 5 to 1000Mz, with an input impedance of 75 ohms. It should have two splits of no more than - 3.5dB each (insertion loss). The other factor is the tolerance limits on the -3.5dB split. A splitter with a tolerance of + - 3.0dB is not as good as one with a tolerance of + - 1dB. In no case buy a splitter with more than - 4dB loss.

One side of the splitter will be used exclusively for your cable modem connection. Do not add any additional splitters after the first split. While the other split is used for your STBs, this line can also be further split for additional STBs.

If you have multiple STBs, a 3 way splitter can be used in the first split. The specs are the same as for the 2 way splitter, except you will have a 3.5dB split (for the cable modem) and two 7dB splits for the STBs.

* Unused splits should be terminated with a 75 ohm terminator.

How long will I have my IP for; is it static?

Most cable ISPs, your IP does not change very often, but it is not static; it is dynamic distribution (DHCP).
There are, however, several reasons that it might change:

• OOL splits your node and you wind up in the part of the split which was assigned new IP addresses.
• You don't turn your PC on for longer than the DHCP lease period (usually 3.5 days) and someone new in your area (connected to the same plant) signs on and grabs your IP. Note: if you have a router, it will hold your IP rather than the PC.
• You change your NIC (if you don't have a router).
• You have a router and change the cloned NIC MAC address to another MAC address.

OOL does not offer static IP addressing for residential accounts; but there is static IP options available with Business level Optimum Online: »www.optimumbusiness.com/online/s ··· atic.jsp

What about cable amplifiers?

Signal boosters (amplifiers, or 'amps') usually cause more noise on the line which will result in disconnects. Also it will kill the upstream signal (out of spec). Amps on a cable modem are never a good idea. Think about it this way: an amplifier is basically "screaming" at the cable modem. You can't "listen" very well with someone "screaming" at you, can you?

Bottom Line: avoid any "booster" or "amplifier" devices on your modem's line.

2.1 Modems

How can I check out my signal levels?

Most cable modems have an internal diagnostics page located at »

Arris users/owners, please see --> »Optimum Online FAQ »How can I view Arris' signal levels?

Also, see link for acceptable signal range:
»Optimum Online FAQ »What should my modem levels be?

Can I buy my own modem?


But why?

In general you are best off getting your modem directly from OOL/Wiz. For $(see OOL website for current pricing) with a 1 year term (penalty=see OOL website for current pricing), as long as you aren't moving our of OOL territory in the 1st year, you most likely won't find a better deal financially.

If you want to get your own modem, OOL will let you. It must be DOCSIS 2 or (preferably) 3 compliant. You run the risk of not getting new firmware releases if you don't get a modem OOL is familiar with, so check in the forum to make certain it's supported. Still, you can get any modem you wish, as long as it's DOCSIS compliant.

If you do get your own modem, just remember to call tech support to register it's MAC address in their system or you'll be shut off after 9 days.

Running DocsDiag to see detailed modem information.

You can use a program called DocsDiag to extract information from the modem. You'll need to temporarily change your computer's or router's IP address when running the program, but you won't have to change any wiring. If your computer is connected directly to the modem, you can use the following instructions if you're running Windows 98/98SE; if you're running another OS, you should determine how to change your PC's IP address before proceeding. (If you have a router, it doesn't matter what OS you're using.)

1. Visit the DocsDiag home page and download the docsdiag.zip file. Unzip the downloaded file to extract docsdiag.jar.

2. Change your IP address to and subnet mask to You can use one of the following methods if it applies to your system (note your current settings before you change them):
    •If your PC is connected directly to the modem and you use Windows 98/98SE, click Start, Settings, Control Panel. Double-click Network. On the Configuration tab, click TCP/IP for your Ethernet adapter, then click Properties. On the IP Address tab, select Specify an IP Address, enter an IP address of and a subnet mask of Click OK and OK. Reboot if prompted.•If you have a Linksys router, go to the router's setup page and select specify an IP address, enter an IP address of, a subnet mask of, and a gateway of•If you have a Netgear router, go to menu 4, change IP Address Assignment to Static, IP Address to, IP Subnet Mask to, and Gateway IP Address to

3. In the MS-DOS window, enter the following command:
For machines with Microsoft's Java Virtual Machine
  jview /cp docsdiag.jar docsdiag

For machines with Sun's Java Runtime Environment
  java -cp docsdiag.jar docsdiag

This should produce output with your signal levels and firmware version. Go here to see what your signal values should be.

4. Put your IP address back to dynamically assigned by restoring the original settings you changed in step 3:
    •For a direct connection to the modem, go back to the TCP/IP Properties dialog box and select Obtain an IP address automatically. Reboot if prompted.•For a Linksys router, go back to the router's setup page and select Obtain an IP address automatically.•For a Netgear router, go back to menu 4 and change IP Address Assignment to Dynamic.

In addition, the following works for Toshiba modems:
To access the built in diagnostics, set your ip statically to, set your subnet mask to and set your gateway to Enter into your browser you'll see the diagnostics page.

What should my modem levels be?

Receive: -15dBmV to +15dBmV
Transmit: 30dBmV to 55dBmV
Carrier/Noise Ratio (SNR): >30dB

The closer to the center of the spec, the better (for receive and transmit).

As you get closer to the edge of the spec, you might start to see some connectivity problems.

Note: signal strength does not really affect speed. So as long as you aren't getting disconnects/pauses/packet loss, you probably are OK, even if you are nearer the edge of the spec.

Why is my modem activity light constantly flashing (even if my pc is off)?

Some flashing of the activity light, even when the computer is not in use, is completely normal. In most cases, this traffic consists of ARP broadcast packets. ARP, which stands for Address Resolution Protocol, is used by TCP/IP to translate IP addresses into their associated MAC addresses, a process which is required for network operation. (The DOCSIS and Ethernet hardware in devices like cable modems, digital cables boxes and the cable modem termination system use MAC addresses when transferring data)

On a few older modems, some additional flashing is caused by multicast packets. Although these are usually filtered out, some modems flash their activity light before the application of the filter.

Once one has established their machine is virus free and firewalled, there is no reason to be concerned about flashing of the activity light. The downstream has 'plenty' of capacity to handle this traffic, so it should not cause any performance degradation.

[submitted by Bichon See Profile]

How do I request a firmware update?

OOL will "push" new firmware revisions out to your modem once they have tested the code and deem it "ready for public use".

If you don't have the newest firmware, but aren't having any problems, don't worry about it, you probably are best to leave well enough alone.

Can I upgrade my cable modem?

Yes, you can, at your local walk-in center.
But, before doing so, consider: are you having frequent disconnects; is your cable modem over 10 years old? There's the old saying of, "If it ain't broken, don't fix it!"; however, even if your modem isn't broken, they may not be able to sustain the upgraded speed tiers over the years.

Once you've finished the transaction at the store, please verify with the service representative that your modem is active before you leave the location, or else you'll find yourself on the phone with Cablevision later on in the day because of your modem hasn't been 'unbricked'.

Also, please see this FAQ for inquiries regarding usage of your own modem with Optimum Online.

How do I know what firmware version I have?

With any modem on the OOL network, you can run DocsDiag to find out the software version.
For more information on how to run DocsDiag, see --> »Optimum Online FAQ »Running DocsDiag to see detailed modem information.

For Motorola Surfboard cable modems, you can use the internal page @ » [see screenshot below; from an SB5100 modem] .. you will see the version identified at the top of the page.

Click for full size

What modems are compatible with CV's new speed tiers?

Here's a sorted list & added some missing modems. All modems in one tier will work with modems in a lower tier provided the supported services match:

Modems Compatible with Optimum Online Boost+ & Ultra service:

    • Arris Touchstone TM-802G (OOL/OV)
    • Cisco DPQ-3212 (OOL/OV)
    • Cisco DPQ-3925 (OOL & Static IP required/OV, Business customers only)
    • Motorola SB6120 (OOL, only)
    • Motorola SBV6220 (OOL/OV)
    • Webstar DPC-3000 (OOL, only)

Modems Compatible with Optimum Online Boost service:

    • Motorola SBV5120 (OOL/OV)
    • Motorola SBV5121XM (OOL/OV)
    • Motorola SB5100 (OOL Only)
    • Scientific-Atlanta DPC2100 (OOL Only)
    • Scientific-Atlanta DPX2203 (OOL/OV)
    • Scientific-Atlanta DPC2203C (OOL/OV)
    • Arris Touchstone TM-512 (OOL/OV 12 lines, Business customers only)
    • Innomedia EMTA 3528-4e (OOL/OV 4 lines, Business customers only)
    • Innomedia EMTA 6528-12e (OOL/OV 12 lines, Business customers only)

Modems Compatible with enhanced speed, Standard Optimum Online Service:

    • Motorola SBV4501 (OOL/OV)
    • Motorola SBV4200 (OOL/OV)
    • Motorola SB4200 (OOL Only)

    Non-compliant Modems:
    Note: subscribers with modems listed below, please see this FAQ for modem upgrades.

      • Motorola SB4100
      • Motorola SB3100
      • MODEMS manufactured by 3Com, RCA, TCE, Terayon, Thompson and Toshiba

    [updated by frdrizzt See Profile]

2.11 Arris

How do I telnet into my Arris cable modem?

Your Arris modem's IP is »
However, like most modems, you'll have a diagnostics page when you click the IP address above in your web browser; unfortunately, this does not work with the Arris cable modems. You will need telnet access to your modem's interface.

You'll need to make sure 'telnet' is enabled and installed on your system.

• You can telnet to your Arris via MSDOS (for Windows) by typing: telnet
• Telnet process, for Macs, can be done via Terminal application (see MacOS link below).

--> For Windows Vista and 7 systems: »technet.microsoft.com/en-us/libr ··· allVista
--> Mac OS systems: »www.wikihow.com/Use-Telnet-on-Ma ··· Mac-OS-X

Arris modem's interface has an daily dynamic password.
Thanks to, chunk73 See Profile - here - there's a downloadable tool that will scramble a new password for you on a daily basis.

Note: as you enter the password, after connecting via telnet, the cursor will not move, but as you type through it still applies. Make sure your cap lock is ON when entering the password.

How can I view Arris' signal levels?

After successfully connecting to your modem via telnet, there should be a command field next to:
[ 1] Console> - type in: rf - hit enter.

There's two separate command functions for downstream and upstream power levels.
In the 'RF' category, type in the following:

• downstream levels: ds
• upstream levels: us

For example, here's what you should be seeing on your command lines-

Upstream stats:
Click for full size

Downstream stats:
Click for full size

As you can see from the screenshots above:
    upstream signal is: 44.25 dBmV;
    downstream signal is: 3.2 dBmV;
    SNR (Signal to Noise Ratio, labeled as MSE in the downstream) is: 38.258 dB

See --> »Optimum Online FAQ »What should my modem levels be?
For industry acceptable signal levels.

Note: the TM822G appears to allow access to the signal page, unlike some earlier models.

Why's the US (upstream) indicator 'orange'?

The US (upstream) indicator is orange to show your upstream isn't using the channel bonding method; unlike your DS (downstream) indicator, which should be green showing your modem is successfully utilizing the channel bonding. Nothing to panic about!

2.12 Motorola

2.13 Cisco

2.2 Troubleshooting

How do I test for packet loss?

Find out your default gateway by going to start-->run-->winipcfg (ipconfig for XP/2000/NT) and selecting your network card in the dropdown box.

If you have a router, the above process will only give you your router IP, instead you will need to go into your router configuration page and find your default gateway there.

Open up a dos box.

Let's say your default gateway is

Type ping -t

Let the test run for a minute or two then hit ctrl-C to end.

If there is more than 2% packet loss, you probably have a serious problem that needs to be investigated.

If you do have packet loss, try to re-run the test a few times to see if it was just some sort of anomaly or if it's definitive.

What do I do if my modem levels are poor?

Take a look at how your connection is set up.

Make sure that your splitter is rated to at least 750MHz.

Are you using multiple splitters?

If so, try to get the modem on the first 2:1 splitter.

If you have a 3:1 splitter, make sure you put the modem on one of the 2 splits that have a lower db loss (the db loss for each leg of the splitter will be printed on the splitter itself).

In general, it's best to split the cable only once before it hits the cable modem.

Also, possibly try replacing the splitter, maybe replace some of the cabling, tighten all your connectors, etc and then re-check your levels.

If all that doesn't get you into a good range, it might be time for a service call.

I'm experiencing packet loss; what can I do?

The first major cause of packet loss would be signal level trouble; as you can check this FAQ entry. Once your signals check out, packet loss is usually a network problem, not a problem inside the house. That said, it is required procedure by Cablevision that each trouble call be qualified with a check by a service tech prior to referral.

This step can be bypassed only if there is documented evidence of others with the same problem on the same node (multiple service issues reported to Cablevision Customer Service); or something else out of whack, such as Cablevision's Network Monitoring Systems reporting a high error count or bad signal to noise (SNR) reading on the upstream at the CMTS.

There have been cases of packet loss (with otherwise good signals) caused by an intermittent connection at the tap, ground block, splitter, or other inside wiring. They want to eliminate these possibilities, first. Also, the service tech can check signal levels, and also see if it's the modem itself that's causing the packet loss.

As a rule of thumb, the following procedure is recommended for anyone reporting packet loss:

    Check signal levels | if any levels are out of spec, all bets are off for packet loss.
    Document it | run ping tests to the default gateway and note the results. See if it's a particular time of day, weather condition, etc. when it happens.
    Contact customer service | request a ping test when the problem is happening. Let them schedule a service call preferably during a 'problem' time.
    • Have patience for the referral process to work.

For any cable operator, intermittent packet loss caused by intermittent noise or interference on the upstream plant is probably the most difficult problem to isolate and fix. It takes some time and considerable effort. Unfortunately, it's also something that the customer usually cannot do anything about themselves.

2.3 Networking

How can I share my Optimum Online connection?

You can share your Internet connection with a router device. (Please do not mistaken a router for a standard hub/switch; they are quite different.) Most standard routers come wired or wireless (or both) and you'll be able to control your internal network using a router- both sharing files between workstations and the Internet.

Most standard routers are quite inexpensive these days.
Newegg.com would be a great place to start, but any electronic / tech store will suffice.
And if you're looking for the best buck on an exceptional router- you can find good stuff from site's members via the For Sale/Wanted forum; then there's eBay.

To name some of the top brands: Linksys (a Cisco brand); D-Link; Netgear; and more.

If you're looking for recommendations (and/or help), visit the site's Networking and Wireless Networking forums.

Can I share my connection with a hub/switch?

No, you can't.

CV provides only 1 IP address per residential account. Now, each device connected to a switch will attempt to pull an IP address simultaneously, which, of course, will not work since there's only 1 to distribute; unlike a router, which "holds" the IP address, and distributes internal IPs (e.g. 192.168.1.X) to the devices within the network allowing each device to share the Internet connection, and still operate as a switch.

This unfortunately is how the networking world operates.

See this FAQ entry:
»Optimum Online FAQ »How can I share my Optimum Online connection?

And, see a brief description by Cisco - switches vs. routers.

Am I allowed use a router to share my connection?

Yes, you can.

OOL support will probably ask you to remove the router if you call for support, but you don't have to hide the fact that you have one. It isn't frowned upon one bit and is not a violation of the ToS, so long as you're sharing to your own household.

See this FAQ to pursue:
»Optimum Online FAQ »How can I share my Optimum Online connection?

What Network Interface Card (NIC) should I use?

For the most part, any ethernet card rated for at least 100 Mbps will work just fine for standard, Boost, or Boost+; however, Ultra tier really requires a 1000 Mbps (or 1 Gbps) NIC as the service level as above the 1 Mbps above most 100 Mbps NICs (Ultra, rated @ 101 Mbps). Most workstations come with at least the 100 Mbps these days, so it is rarely an issue.

What routers are compatible with OOL's standard & Boost tiers?

There are many routers that seem to work with the new OOL speeds. It is impossible to list all of them here. As new routers show that they can handle the different speed tiers, they will be added to the list. Also, some users might find that a certain router listed here does not perform as it should. Theses routers were chosen because users on the »OptimumOnline forum have stated their speeds and were considered to be in the acceptable range for OOL.

The Wired/Wireless column indicates the capability of the router and does not relate to speed.

All potential speeds are using a [wired] connection.

All "G" routers have a maximum potential wireless speed of 27 Mbps. Actual speeds will vary depending on individual circumstances. It is possible to attain 25 Mbps under ideal circumstances.

For full BOOST potential wireless speed a "N" router and card are needed.

All routers have 10/100 Mbps WAN and LAN ports.

When TCP overhead is taken into consideration (about 5 to 12%), these routers should provide at least 13 Mbps on the download side for the 15 Mbps/2 Mbps tier; and 'at least' 26 Mbps on the download side for the 30 Mbps/5 Mbps tier. Note: With the change in the download caps, users can see speeds up to 15 Mbps+ down and on BOOST 30 Mbps+ down.

Routers that are capable of 30 Mbps/5 Mbps speeds also will work with the 15 Mbps/2 Mbps tier

15 Mbps/2 Mbps Plan (now 16.5/2)


Model Number






















v2. 802.11b wireless mode. Expect about 5mb on the DL side.






WPN824 Rangemax


This router is a mixed bag. So beware.There are issues with the wireless side not being able to get good speeds.Achieves high performance only when in channel-bonded mode.












30 Mbps/5 Mbps (BOOST) Plan (now uncapped/5)


Model Number






Pre "N" Router




"N" Router
































N Router








v3 or later




Gigabit LAN ports; VPN capable.




















"N" Router


WRV 200 "Rangebooster"





Note: Must upgrade FW to v 2.x to get BOOST Speed.




RangeMax 240




Must disable Keyword filtering; 8 LAN Ports


2 Plus


$170 retail





[thanks to Irish Shark See Profile for this FAQ.]

3.0 Email

How many email addresses are provided?

You are allowed to have up to 5 email addresses (Optimum IDs), 1. primary; 4 sub-addresses.

Each I.D./address gets an independent inbox.

To add/delete IDs | go to the Account Management System --> sign in --> scroll down to "ID Center".

What are the email allocation limits?

Mailbox size is now 2 GB for standard & 5GB for Boost. Still max 5 or 15 email addresses, respectively. From webmail, the above parameters are correct: "The maximum size of any inbound or outbound e-mail is 20 MB per message. This includes the total size of the message itself and any attachments to that message. You can send out a message to a maximum of 50 recipients at one time." From an email client, you can send to 100 recipients in a single message, but up to 500 within a 60 minute period. Boost customers can send emails up to 100 MB in size, and standard can send up to 25 MB in size.

[thanks to frdrizzt See Profile]

How can I access my email via web?

Yes, they offer web service mail via »mail.optimum.net
You'll be prompt to enter your user name (full email address no required) and password.

If you delete the mail during the web-mail session, it will delete the mail from your mail server as well.

How do I submit e-mail messages that have been miscategorized as Spam?

1. Select the desired e-mail message in Webmail, then select Forward. Optimum Online Webmail enters the subject of the original message, prefaced with Fwd:. Attachments that came with the original message are included.

The original message appears in the attachment field labeled original message. New attachments if any sent with the original message also appears in the attachment field along with the original message forwarded.

2. Send the wanted e-mail message to notspam@cv.net.

3. You must submit any wanted or "good" e-mail messages within three days of your receipt of it in order to have effective rules written to remove that message from the SpamAway filter.

Can I use a non-OOL SMTP (outgoing mail) server?

In many cases, non-Optimum Online SMTP servers are blocked. This is a measure meant to reduce the ability of infected PCs on the CV network from sending massive amounts of spam email (see Optimum customer service- "Port 25 and Optimum Online").

There are a few workarounds:

    • Business Optimum does not have this restriction, and Boost subscribers can remove the restriction freely.
    • You can use SMTP over a nonstandard port (465, 587), if you provider offers the option.
    • If your provider offers STMP secured by SSL, that works too.
    • Outlook (and other email applications) will allow you to use the Optimum Online SMTP server (and your Optimum I.D.) if there is no other way to get outgoing email working. This will allow you to use a desktop email client and emails will still appear to come from the non-OOL email. Unfortunately, this has drawbacks- messages sent via this message will (usually) not be saved in the "Sent Mail" folder on the server.
    • In a worst case scenario, you might have to use webmail instead.

4.0 Optimum Voice FAQ

5.0 iO FAQ