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Discover Voice by CMS
Communication solutions

for business.

Explore CMS Voice Services

Phone Service


Elevate your communication with premium phone service built by CMS for unparalleled flexibility and support fit for businesses of any size. Includes unlimited calling and a suite of flexible features, all without hidden fees. Experience telephone service designed to eliminate technical and support frustration with the freedom of no contracts.

Phone Systems

Choosing the right phone system for your business can be a daunting task. CMS offers multiple cost effective PBX solutions that will fit any business need. Our team of experts is dedicated to understanding your requirements and proposing the solution that is right for you. Book a free consultation today to learn more!


Voice Reputation


CMS has teamed up with Numeracle to provide a robust solution aimed at safeguarding your communication channels from improper blocking or mislabeling. Through proactive reputation management, negative associations with your Verified Identity's phone numbers can be identified and remedied, ensuring that your calls reach their intended recipients without interference

Frequently Asked Questions

How long has CMS been providing Phone Service?

CMS began providing phone service in 2005. Starting as a reseller and then building our own phone service platform in 2008 after seeing the need for a premium service without the technical and support limitations of other traditional VoIP providers.

How long has CMS been providing phone systems?

CMS has been providing and supporting phone systems for over 20 years.

What is VoIP?

VoIP (Voice over Internet Protocol) is a broad term for delivering voice service over IP networks or the internet.

Is CMS phone service VoIP?

Yes, all modern phone service is delivered via VoIP.

Do CMS phone systems use VoIP?

Yes, CMS phone systems are VoIP based.

What is a PBX?

Phone system and PBX are used interchangeably. PBX (Private Branch Exchange) is an older telecommunications term that is still used today and is in reference to the system that connects your organizations phones together.

What is SIP trunking?

SIP trunking is what connects an organizations phone system (PBX) to the phone service provider, over the internet. This connection allows for cost effective service delivery, advanced call routing features, and simultaneous delivery of all calls to and from the organization.

What is a CMS phone system?

CMS provides both hosted PBX, (also sometimes referred to as virtual PBX) and on-premise systems. CMS will help determine what system is best for your organization.

Can my organization manage a CMS phone system?

Yes, you can have as little or as much control over your CMS phone system as you please. CMS is there to provide full management or support if needed.

Does CMS phone service work with any internet provider?

Yes, CMS phone service works with any internet provider.

Can CMS phone service be used with a phone system provided by someone else?

Yes, CMS phone service will work with any phone system (PBX). CMS will deliver service to your PBX with a SIP trunk. If your PBX does not support SIP, CMS will provide a SIP to analog device to interface with your system.

I'm locked into a phone service contract, can I still purchase a CMS phone system?

Yes, CMS will help in any way possible to fit your current need.

Will CMS phone service work behind NAT?

Yes, CMS phone service will work behind one or more layers of NAT with no configuration required.
You don't have to decide.

Contact us for live help on determining what solutions best fit your needs.

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