Cambium Networks Announces Commencement of CBRS Services

Cambium Networks is pleased to announce the commencement of the CBRS SAS Services, providing service in in the CBRS (Citizens Band Radio Service) spectrum (3.55 to 3.7 GHz). Support is offered on the PMP 450 series platforms utilizing the cnMaestro management system. This is an exciting development in the release of additional spectrum to help meet the increasing need for bandwidth. Spectrum in this band is dynamically shared in a tiered structure that requires a real-time interface to a Spectrum Access System (SAS). Cambium Networks equipment helps the end user manage the relationship with the SAS by facilitating the communication path from the radios via cnMaestro and the Domain Proxy.

There are several SAS System Administrators that are in operation today. Cambium Networks will work with three of them; Federated Wireless, Google and CommScope*. The operator will select one at the time of sign up via cnMaestro. The pricing to use these SAS Services is the same regardless of the provider.  Pricing will be $3 per Subscriber Module per month. (There is no charge for the Access Point). When signing up with cnMaestro, either credit card information or ACH (Automated Clearing House) information will be required, there will be an automated invoice charged for the prior 1 month period (i.e. payment for the SAS Service is monthly in arrears).

Cambium Networks is targeting an Open Beta release of PMP 450 System Software Release 16.2 on January 6, 2020. In addition, a version of cnMaestro (both Cloud and On-Premises versions) supporting CBRS Operation will also be available at this time. Both components are required to operate in the CBRS service (in addition to other requirements of usage of CBRS such as Certified Professional Installation (CPI) certification**, etc.). During the month of January, Cambium Networks will not charge for devices that are registered with the SAS, but fully expects to begin accruing charges on February 1st, 2020, with the first invoices being delivered and payment collected in early March, 2020.

Any device that is registered with a SAS for 24 hours or more during a billing month will be charged $3. The full Terms and Conditions will be made available HERE (link to be inserted shortly).

Feel free to post any questions below, or send me email at

*Cambium Networks reserves the right to add or remove any SAS Administrator at their discretion. CommScope will be added at a later date.

**CPI training is offered by all three of the SAS Administrators, and the certification is valid regardless of which SAS you choose to use.

Federated Wireless CPI Training

Google CPI Training

CommScope CPI Training


Great news!

Is it really work 3 dollars a sub?  Also, what is the minimum billed amount as we are new to the game and are just ramping up.

Great to hear. Looking forward to testing this out and getting started.

Will Cambium provide a guide/walkthrough on how to get cnMaestro and CBRS up and running before software is released? I'd like to get the reading in ahead time during the holidays if I can.

@agoodmn wrote:

Is it really work 3 dollars a sub?  Also, what is the minimum billed amount as we are new to the game and are just ramping up.

If you are asking if it's worth it, that is up to each operator to determine... extra (managed) spectrum could be very valuable, but it does come at a cost.

There is no minimum billed amount. Once you get things rolling, if you have a single sector with a single SM on it, you'll be billed for one device.

@Fld Wrls  wrote:

Great to hear. Looking forward to testing this out and getting started.

Will Cambium provide a guide/walkthrough on how to get cnMaestro and CBRS up and running before software is released? I'd like to get the reading in ahead time during the holidays if I can.

Yes, we are planning to release training modules in our LMS (on very shortly... perhaps the initial ones within a week or so.

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I have also received some questions around "licenses" for using CBRS.

Unlike Part 90 (the old 3.65 GHz band), there is no license required to operate under CBRS. There is no requirement to interact directly with the FCC in any way. If the operator is using CBRS-certified equipment (and recall that ALL of the PMP 450 radio equipment is now certified for Part 96 (CBRS) operation), then anyone can deploy a network using CBRS.

If the topic of "licenses" is more around the PAL (Priority Access Licenses) auction that is expected to occur in June, 2020, then you can certainly read a whole lot more about this at the FCC Auction 105 website. The Fact Sheet is a great summary of what these licenses can do for you, and may give an indication of what they might cost (at least a starting point).

Mr M..  RE Cambium's SAS operations pricing..

Please let us all know what happens if we have a pre-existing SAS operator relatiohship w/an existing SAS operator that is--NOT part of your choosen 3 (..or one of your 1st two + the SAS operator you are planning to bring on soon)

Asking this question another way..  What is the value-add we''d see from Cambium's $3 per sub pricing--vs other lower cost publicly announced SAS operator "per sub" pricing?


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If you're already using another SAS for other equipment, that's no issue at all. However, when using Cambium equipment, the services related to the SAS will be charged through Cambium. You can still make an independent choice for the SAS when bringing Cambium equipment onboard.

Cambium networks provides the Domain Proxy module, which handles the communication path between the SAS and the equipment. Further, there are device certificates that are required. (If an operator is required to obtain device certificates on their own, there are significant costs in doing this.) Most equipment vendors (whether LTE or not) operate using the same model.

With other products, this cost may be embedded in other services, but with Cambium, there really are no other services that are regularly charged for (such as annual software maintenance, EPC services costs, or other license fees typically associated with other equipment). This is the first time that Cambium Networks is entering into a direct commercial relationship with end customers.

When using Cambium equipment for CBRS, this is the architectural model. The cost for this service is independent of which SAS is chosen.

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Quick Update: We are working hard to finalize the beta release and open it up for use.

At this point, we expect to release the beta radio software (R16.2) on Tuesday, January 14.

For those using cloud-based cnMaestro, you may already have noticed the availability of the CBRS-capable Beta version. This is the first step in getting ready to start using CBRS.

Additional training has also been released on the Cambium Networks Learning site.

Hey Matt,

Let me know if I am wrong here, but for those of us that are using cnMaestro on-premise, we won’t be able to connect anything to the SAS until the on-premise update of cnMaestro is released correct?

I’m trying to understand this as much as possible for planning purposes.


Hi Matt

What's the word on on-premise cnMaestro for CBRS?   

On a related topic, when can we expect to see the commercial details (ie the terms and conditions)

on the subscription agreement for SAS services with Cambium? 

When is the 16.2 firmware going to be released now? On-premesis cnmaestro?

We only have until april to get migrated and we really need to get moving on CBRS deployment here.

I am glad to see such interest in this!

We expect to release R16.2 Beta for the 450 platform as well as the cloud cnMaestro beta version (that will get a lot of folks started down this road) late tomorrow, pending verification early in the day.

The NOC or on-premises version of cnMaestro will be a few weeks further out, likely mid-February. I will continue to update this thread as we learn more and zero in on dates.

If you're using on-premises, but want to get started and familiar with the onboarding process and CBRS operation, I would recommend giving the cloud version a try with a limited set of equipment. Then, when the on-premises version is released, you can migrate those devices, and continue to add them into CBRS.

We are as excited as all of you to get this ball rolling...


Ummm....that's fine as far as it goes, but without access to a SAS it seems premature. 

Where / how do we sign up with Cambium for domain proxy services and get our CPI account set up with your SAS?

The Cambium architecture sets you up with your choice of SAS. This is done during the setup process...

As mentioned above, we currently support both the Federated Wireless and Google SAS, with the intent to bring CommScope onboard in the near future.

Have you taken the CBRS training courses we are offering on our learning site?

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If a CBRS AP losses access to cnMaestro, cloud or local, how long tell it and SMs stop transmitting?

The heartbeat is every 4 minutes.

I read the release materials on the Beta software and CBRS in the cnMaestro cloud version.   I didn't see any caveats or mention of the Part 96 band being now open for deployment of commercial services.    So, if we choose, we can now put AP and SM into the new band via our SAS by using  Beta software at this point?

For some reason, maybe I was mistaken, but I was anticipating some type of official statement or press release from the FCC that CBRS was now approved for GAA use under Part 96 rules and that Part 90 Subpart Z was officially defunct.