Connect Your Hardware PBX to the Cloud and Save

There are many businesses that continue to rely on an on-site PBX. Whether they do so to maintain complex multi-site routing structures, custom integrations, or existing hardware, the fact is there is a wide swath of businesses looking to leverage SIP trunks but unable to upgrade to an IP-PBX.

VoIP (Voice over Internet Protocol) can be used to deliver your on-site PBX system’s call traffic over the internet with SIP Trunking. The main reason to implement SIP trunks is the savings it will bring to the company. SIP trunks offer much cheaper rates than conventional providers mainly because a service that you already pay for – your internet connection – is used to deliver call traffic, bypassing any long distance carrier. It can get rid of expensive voice T1 circuits or a number of Bell telephone (POTS) lines by consolidating all your telephone lines and PRIs into a single SIP connection.

VoIP is more efficient in providing the required number of channel than traditional Bell POTS (Plain Old Telephone Service) and PRI (Primary Rate Interface). With traditional phone lines, whenever a company required an extra channel even when used for a few minutes during peak hour, it had to purchase an additional line that would not be utilized most of the time. With SIP trunks, channels are virtual so the company now has the flexibility to dynamically allocate the number of channels needed on demand.

Reduce costs and simplify IT management by combining voice and Internet access over a single Internet connection while continuing to use your existing IP PBX system. Purchase only the SIP trunks you need based on the maximum number of concurrent calls your business requires.

If You Like your Phone System, You Can Keep It

Because on-site legacy PBX and key systems aren’t IP-enabled and don’t support SIP trunking, business that want to take advantage of SIP for cost reduction are often forced into a completely new systems upgrade when, in reality, the existing system serves them fine. CrescentCX offers an interim step that can allow you to keep your existing hardware yet fully realize the monthly telecom cost savings by moving to a SIP trunking solution. By deploying a small, multi-line analog telephone adapter in conjunction with the existing key system, the phone lines going out to the phone company can simply be plugged into the adapter box. The adapter converts the analog lines to SIP and the calls flow through the existing Internet connection to the CrescentCX servers.

Save Money

Pay less when you route calls over your internet connection.

99.999% Uptime

Industry-leading reliability and system uptime.

Fast/Friendly Support

Our Support Team is standing by 365 days/year.


Bring Your Existing Phone Numbers or Choose From Thousands of New Numbers

We’ve been providing phone service to businesses of all sizes for over 20 years. We understand how critical it is to maintain your primary business phone numbers so that your partners, employees, clients, and customers remain connected at all times. That’s why we provide a seamless process to port your existing numbers and instantly add new local, toll-free, and international numbers. CrescentCX per minute rates on your inbound and outbound calls are also some of the lowest in the industry. Get a better idea of what your company’s monthly costs might be, get in touch with our team – we’re happy to put together a custom quote for you.


Deploy SIP Trunking in an Instant

Our online interface makes it easy to connect your Toshiba, Panasonic, Avaya, Cisco, Shortel, and all other SIP-enabled PBXs so you can deploy SIP Trunking in an instant. Simply choose your provider and enter your static IP or SIP URI to get started. Should you need any help, our team is available, 24 hours/day, 7 days/week, 365 days/year!


Cut Costs and Scale at Any Time

Local voice trunks and PRI lines are expensive, but luckily, they’re not the only option for companies looking to maintain an on-site PBX. SIP Trunking offers a much lower cost per minute for voice traffic and can often allow companies to consolidate communications providers. But perhaps the most attractive advantage is the ability to scale up or down with ease whenever you see fit.

All CrescentCX High-Quality SIP trunks offer:

  • Both Username / Password or IP authentication. With IP authentication, an unlimited number of Call Termination trunks can be configured in a single account.
  • An enhanced “burstable” channel feature that temporarily allows for more call channels than initially provisioned in order to accommodate bursts of high phone call traffic.
  • Need to scale up to add more channels during peak holiday traffic? No problem! Additional channels are available anytime.
  • Manage the usage of your channels with the help of our SIP Trunking experts who provide alerts and guidance when it’s time to scale.