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Arris TM822G: Is this modem with phone functions good enough for you?

Updated on September 21, 2015
Arris TM822G Touchstone telephony cable modem
Arris TM822G Touchstone telephony cable modem | Source

I have done standalone and comparison reviews on the Arris Motorola SB6183, Arris Motorola SB6141 and Arris Motorola SB6121 cable modems and found that many people needed a cable modem that also has telephony capabilities.

Whilst the Arris Motorola SB6183, SB6141 and SB6121 are excellent cable modems, they are not cable phone modems and as such does not allow you to plug in your phone to make digital voice calls.

Telephony modems allows you to call over the internet
Telephony modems allows you to call over the internet | Source

So if you are looking for an alternative to either one of those cable modems mentioned above, then a good cable phone modem or EMTA modem to look at; especially if you are looking for one that gives you very good speed is the Arris TM822G or the Arris TM722G.

As you could have guess, the Arris TM822G is the latest i.e. it is newer version of the Arris TM722G.

In this hub, I will focus on the Arris TM822G but I will also do a comparison analysis between the Arris TM822G vs TM722G later on so that you can decide which is better for your needs..

The longer name for the Arris TM822G cable phone modem the is Arris Touchstone DOCSIS 3.0 8x4 Embedded Multimedia Terminal Adaptor (E-MTA) TM822G. However I will just refer to it as the Arris TM822G here.

DOCSIS 3.0 brings speed
DOCSIS 3.0 brings speed | Source

The key thing to note here is the word DOCSIS especially the version 3.0 which is the latest standard at the time of writing.

Without going into the boring technical details on what DOCSIS is and how it works, just know that DOCSIS stands for Data Over Cable Service Interface Specification which is an international telecommunications standard that governs the high-bandwidth data transfer to an existing cable TV (CATV) system.

DOCSIS is important for us because approximately 80-90 percent of households in the US are wired with cable and especially so when we are looking at the use of telephony cable modem for our voice calls, internet as well as entertainment.

How DOCSIS is able to provide you with the speed is through this technology called channel bonding.

To easily understand channel bonding, think of your data having to get to you through data pipes and these data pipes are similar to your water pipes.

Channel bonding is key in the DOCSIS technology
Channel bonding is key in the DOCSIS technology | Source

The data or water pipe are of a certain size.

Due to the size limit, only a certain volume or quantity can get through at any one time. However if you combine a few of those pipes into one big pipe, then you can feel a gush due to the combined volume going through the pipe! This is a very simplistic explanation on how channel bonding works.

If you are interested in a more technical explanation then check out my hub titled Is It Better To Buy Arris Motorola SB6141 over SB6121.

Get answers to your questions on Arris TM822G or TM722G
Get answers to your questions on Arris TM822G or TM722G | Source

What is the Arris TM822G and what can it do?

Apparently,many people are confused over what the Arris TM822G telephony cable modem is and what it can do.

So I hope I will be able to answer the commonly asked questions with regards to the Arris TM722G or TM822G that you may have.

Hhere are some of the common questions many people have with regards to those two telephony modems:

Can I replace my existing Arris TM602G telephony modem with the Arris TM822G?
Yes. Obviously you can. As the Arris TM822G is a DOCSIS 3.0 class, it is approximately twice as fast as the Arris TM602G modem. Another thing to note is that if you are on Comcast's Blast internet, you will need this DOCSIS 3.0 modem to get the Blast speeds of 50M down / 10M up. On the other hand if you are on Comcast's Performance internet with 25M down / 5M up, then either modem will work.
Do I get WiFi or wireless with the Arris TM822G?
No. The Arris TM822G is a cable modem with a capability to transmit digital voice and data only. You will need a wireless router in order to provide WiFi.
Can I use it with Comcast’s Triple Play package?
Yes. The Arris TM822G can be use with Comcast’s Triple Play offering. Its under the list of Comcast's approved device.
Does it work with Time Warner Cable (TWC)?
I would advise that you to check with TWC as they have their own rules and may change from time to time.
How many Ethernet port does the Arris TM822G has?
The Arris TM822G has only one (1) Ethernet port. You can either connect this Ethernet port to your CPU if you only have one CPU. In this case you don’t need a router. However you restricted to connecting only to your CPU. As such most people would connect from this Ethernet port to a wireless router. There are usually many ports on the router for you to connect to different devices such as your CPU, printer etc
Can the Arris TM822G be used as a bridge?
No. This because the Arris TM822G is a pure modem. On the other hand, a "gateway" modem is one that also incorporates WIFI into it. Putting a gateway modem into the bridge mode allows you to connect your own WIFI device to the modem and use it for WIFI instead of the gateway modem's built in WIFI.
What is its SSID (Service Set Identifier)?
The Arris TM822G does not have an SSID as the SSID is the name/identification assigned to a router. The SSID is used by wireless routers to identify themselves to devices that is used to connect to them. As the Arris TM822G does not have routing capabilities, it does not need an SSID.
Is the Arris TM822G wall mountable?
Diff bet Arris TM822G vs Motorola SBG6580?
Diff bet Arris TM822G vs Motorola SBG6580? | Source

What are the differences of the Arris Motorola TM822G vs SBG6580.

There is also a confusion between the Arris TM822G vs the Arris Motorola SBG6580.

However once you look at the main features of the Arris TM822G and SB6580 put side by side in the table below, it should be very clear to you what the differences are.

In short the Arris TM822G is a telephony cable modem while the SBG6580 is a gateway or a cable modem with a wireless router build in. The Motorola SBG6580 does not allow you to connect your phone to it as it is not a cable phone modem.

On the other hand the Arris TM822G does not have a wireless or wired router function.

If you want to have the best of both worlds i.e. have a cable modem that is capable of telephony and wireless routing capability, then look at the Arris TG862G.

Here is a summary of the main differences of the Arris TM822G vs Motorola SBG6580:

Arris TM822G vs Motorola SBG6580

Arris TM822G
Motorola SBG6580
Allow to connect phone
Router function/WiFi
DOCSIS Version

Comparison between Arris TM822G vs Motorola SBG6580

Arris TM722G vs TM822G
Arris TM722G vs TM822G | Source

What about the differences between the Arris TM722G vs TM822G

Ok. I mentioned about the "older" Arris TM722G earlier in this hub and you would probably be interested to know what are the differences and similarities between the Arris TM822G vs TM722G to decide which is the better choice.

So here is the comparison of the main features of the Arris TM722G vs TM822G telephony modem.

Arris TM722g Vs TM822G

Arris TM722G
Arris TM822G
Channel Bonding
Up to 150 Mbps
Up to 300 Mbps
VOIP Phone line
Wireless Router/WiFi

Comparison between Arris TM722G vs TM822G telephony modem

Which of these devices do you buy then?

In summary, just to make it easy for you to make your decision as to which of these devices to buy:

Buy the Arris TM822G telephony modem if:

  • you need high download speed - up to 300 Mbps
  • DOCSIS 3.0 modem - especially if your plan, for example is the Comcast Triple Play
  • Need to connect at least a phone line (it can connect two)
  • the latest telephony modem
  • you need WiFi but has a separate wireless router (TM822G does not have wireless capability)

Buy the Arris TM722G telephony modem if:

  • you need high download speed - up to 150 Mbps
  • DOCSIS 3.0 modem - especially if your plan, for example is the Comcast Triple Play
  • Need to connect at least a phone line (it can connect two)
  • you need WiFi but has a separate wireless router (TM722G does not have wireless capability)

Note that the Arris TM722G is only a few dollars less than the latest model i.e. the Arris TM822G which is twice faster than the TM722G. Unless you have a very valid reason to get the TM722G, I would highly recommend that you go for the latest and get twice the speed as well for just a few dollars more.

I always like to look at various options as the needs of different people may be different. As such I would like to point out an even older version of the Arris TM822G or TM722G - the Arris TM602G which may still be suitable for some people.

Buy the Arris TM602G EMTA modem if:

  • you need download speed less than 150 Mbps
  • you only need a DOCSIS 2.0 modem
  • Need to connect at least a phone line
  • you have a separate wire/wireless router
  • you want to keep the cost low but also have the telephony capability

My humble opinion is that unless you really need the Arris TM602G modem, it is better to buy the DOCSIS 3.0 EMTA modems like the Arris TM822G or TM722G as the DOCSIS 2.0 technology used in this modem is slower and already outdated even though you can still use it.

As I have mentioned earlier if you want to have everything i.e. cable modem, telephony and wireless routing capability in one box, then the Arris TG862G is a good choice.

Buy the Arris TG862G gateway telephony modem if:

  • you need high download speed - up to 300 Mbps
  • DOCSIS 3.0 modem - especially if your plan is for example the Comcast Triple Play
  • need to connect at least a phone line (it has options for two)
  • you need WiFi and want a built-in wireless router - all in one box

Battery... no battery...???

There is some confusion out there for people who purchase the Arris TM822G or TM722G with regards to the backup battery. Some vendor will package in the backup battery while others don't.

So look at the product description carefully. However don't sweat over it as the battery is normally less than ten bucks. If it does not come with the battery then get one!

By the way, the battery is only for the purpose of keeping your phone working should there be a power failure. It is a backup battery.

It is not required to run both the Arris TM822G or TM722G.

Naw... I don't want these telephony cable modems...

Are there alternative solutions if you do not want a telephony cable modem? Yes there. Some people prefer to have separate pieces of equipment so that if one fails, they find that it is easier to isolate and replace that failed equipment.

If you prefer this configuration, then you will need three pieces of equipment:

  1. Cable modem
  2. VOIP telephone system
  3. Wireless router (this is not necessary if you have only one CPU connected to the modem but I believe this is very highly unlikely in today's environment as there are a plethora of wireless smart devices in everyone's home that needs to be connected to the outside world that can be easily done via the wireless router).

For cable modem...

You have a choice of either the Motorola SB6183, Motorola SB6141 or the SB6121. Check out the links if you need more information about those three routers from Arris.

Those three are all solid, proven and highly recommended cable modems. The main differences between these modems are mainly their download speed and the time when they were made available for sale.

The latest cable modem, the Arris Motorola SB6183 is twice as fast as the Arris Motorola SB6141 while the Motorola SB6141 is twice as fast as the Motorola SB6121. However, the upload speeds of all three are the same. Don't buy the Motorola SB6120 as it is outdated.

i. For the latest and fastest cable modem available to date, get the Motorola SB6183:

The Motorola SB6183 is the latest cable modem (no telephony) from Arris. It can go up to a top download speed of a whopping 686 Mbps.

ii. For the most popular cable modem, get the Motorols SB6141:

Currently the Motorola SB6141 is the most popular cable modem for home users. It has a top download speed of 343 Mbps which is similar to the Arris TM822G or the Arris TM722G. This is sufficient for most people at the moment.

iii. For the most reasonably priced cable modem, get the Motorola SB6121:

The Motorola SB6121 is a very solid and reasonably priced cable modem. It has a top download speed of up to 160 Mbps. However due to the price reduction of the Motorola SB6141, many people don't mind paying a few dollars more for the SB6141. Otherwise if you are on a budget, the Motorola SB6121 will not let you down and is a value for money.

You can find all three to be very competitively priced at Amazon.

Now you have got the cable modem, what is next?

If you do not use any of the Arris TM822G or TM722G but want use a digital telephone line over your cable, then you will need a separate telephony device like the Ooma Telo.

The Ooma Telo gives you very clear and pristine voice over your cable. While the calls are free within the US, international calls are charged at a very nominal rate.

This one time purchase is a very worthwhile investment if you are looking at coupling it with the Motorola SB6183, SB6141 or SB6121 cable only modems to get voice over your cable.

Follow the following link if you need to find out more on the Ooma Telo.

Sharing the internet access

If you are using any of the cable only modems, then most likely you will want to get a wireless router to get WiFi.

Find out more about selecting the right wireless routers from the hubs below.

Share your thoughts?
Share your thoughts? | Source

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I am always striving to provide better information to my readers.

So if you could kindly spare me a few seconds to provide your feedback? Your feedback will help me provide better information for my next hub.

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© 2014 James Causian

What more would you like to see and what comments would you like to share?

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    • profile image


      3 years ago


    • profile image


      4 years ago

      I've had a 722 for a few years now; it has worked very well. Comcast is urging me to upgrade. (If I did upgrade, I would go for the 822 as I need the telephony support.) I find it hard to believe that Comcast would give me better speed without asking me to pay for a higher speed tier. Thus it doesn't seem like it is worth it to buy a new modem. Thoughts?

    • profile image


      5 years ago

      Will I need a telephone port on the modem or will I be able to use a port on the router. I have magic jack.

    • profile image


      5 years ago

      Thanks for the information you provided regarding the TM722g and TM822g. However, after over 2 hours and 2 phone calls to Comcast, they said they are not able to hook up a purchased TM822 as yet. So, I'm stuck buying the TM722g. They said, "yes, it is compatible, but we are unable to connect and support it at this time."

    • James Causian profile imageAUTHOR

      James Causian 

      5 years ago from Huston, Texas

      Functionally both are similar with the additional EMTA function in the TM822G.


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