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Business Phone Service Has Never Been This Easy

cLear Digital SIP Trunking service replaces legacy local and long-distance lines and gives businesses:

  • Unlimited calls to the U.S. and Canada

  • Month-to-month service with no contract

  • 24- to 48-hour setup time

  • A local phone number from anywhere in the contiguous United States

A SIP trunk is a digital phone line that allows your business to make and receive phone calls through your existing Internet Protocol (IP) network connection. You will need as many SIP trunks as you  have simultaneous active calls at any given time. For example, if you have 10 phone users in your office and you know that at any given time you have 5 or 6 users on the phone simultaneously, then you will need 6 SIP trunks.  cLear Digital will help ensure your business has enough trunks to handle your maximum simultaneous call volume on any given day. Because SIP trunks can be added or removed within hours, your business can always make adjustments to run at the maximum efficiency.

Click on the links below to learn more about SIP Trunking:

SIP Trunking Advantages

SIP Trunking Features

How SIP Trunking Works

Network Coverage

Realize True Business Advantages with SIP Trunking

Long gone are the days when you needed the regional common carrier to install copper lines in your office whenever you ordered phone service.  Business telephone service has changed in the past few years thanks to using the Internet for normal telephone calls. The various common business phone services such as regular POTS lines with line hunt groups, voice T1, PRI, and ISDN are all being replaced by the SIP trunk. The SIP trunk is so flexible that it easily replaces all of these traditional phone services and performs each of their jobs at a lower cost. All you need is a stable Internet connection with an existing phone system and your location is ready for SIP trunking and the many benefits it provides. 

  • Save money with flat-rate, unlimited calls to and from the U.S. and Canada

  • Enjoy the freedom of month to month service and no contracts

  • Save more money with highly discounted international calling rates as low as a penny per minute

  • Disaster-proof your business with our "always on" SIP trunks

  • Order local telephone numbers across the contiguous 48 states and give your business a local presence anywhere it needs

  • Move your business operations anywhere in the country and your SIP trunks instantly move with you

  • Add or remove phone numbers and SIP trunks within minutes

  • Minimize your expenses by combining voice and data in a single network

  • Protect your previous investment and keep your existing IP-PBX or PBX system

  • Retain all of your existing PBX system features so you won't need to retrain employees on functionality

  • Enjoy the highest quality sound with digitally optimized voice handling

  • Relax knowing you have technical support available 24/7

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Unmatched Features with cLear Digital Remarkably Affordable Service

  • Unlimited in & outbound calls to the U.S. and Canada

  • Customer Web portal with DID (Direct Inward Dial) fallback forwarding to IP address or telephone number

  • Local Number Portability

  • Enhanced 911 Emergency Service

  • Inbound Caller ID Name

  • Outbound Caller ID Name

  • DID Telephone Numbers

  • Toll-Free Numbers*

  • Directory Listing

  • 411 Information Service*

  • International Long Distance Service*

  • G.711 & G.729a Codecs

  • IP Authentication

*Additional charges may apply

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How SIP Trunking Works

As a phone line replacement, SIP trunks require an IP-PBX, PBX, or Key Telephone System already in place. A "network ready" IP-PBX (e.g. Asterisk, FreeSWITCH, FreePBX, Trixbox, Fonality, Shoretel, Avaya IP office, etc.) will use our SIP trunks directly by subscribing to our intelligent VoIP network through the Internet. We simply enter our network authentication information into your IP-PBX and it will instantly subscribe to however many SIP trunks and DID telephone numbers you have on your account. Since your IP-PBX is already connected to the Internet through your office's Local Area Network, nothing else is required.

A traditional PBX or Key Telephone System that is not "network ready" can also subscribe to our SIP trunks and DID telephone numbers, but it requires the use of a VoIP gateway. The VoIP gateway acts as a static bridge between your traditional PBX system and our intelligent VoIP network. The VoIP gateway plugs into your office's Local Area Network and is permanently connected to the Internet and subscribed to our network. Your PBX phone system then physically plugs into the VoIP gateway using the same lines that connected the PBX to your previous common carrier. Under these guidelines, your PBX or Key Telephone System requires no programming or configuration. The pre-programmed VoIP gateway handles everything for you.

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cLear Digital Secure, Next-Gen Network

Our network uses intelligent routing to constantly optimize the connection between your service location and the edge of our IP network. The intelligent routing occurs at a global level allowing us to serve customers world-wide. 

We designed our network to run at 100% availability. With no single points of failure in any layer of our redundant architecture, the odds of an actual loss of telephone service are slim to none. Our network resides in highly secure TIER-IV facilities rated to withstand even the most catastrophic disaster, which means we cannot go down because of power losses or surges. Our network is also simultaneously connected to Tier1 bandwidth providers and won't go down because of lost connections or lines.

Our VoIP network functions on open source software that is fully customized and programmed in-house.  We develop our feature applications in-house as well. We control all aspects of our VoIP network and can rapidly provide support. We manage our own equipment, capacity, power redundancy, technology upgrades and security.

We can provision local telephone numbers across the contiguous 48 states as well as in multiple foreign countries. 

Click here to view a diagram of cLear Digital network configuration.

Please contact us for more information about your specific application.

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