SIP Trunking

Spectrum Business SIP Trunking is perfect for the business that is ready to take full advantage of their IP-PBX by utilizing one connection for voice, data and internet traffic. This converged approach saves money and time by using bandwidth efficiently, reducing hardware costs and simplifying network management. With Spectrum Business SIP Trunking, voice traffic travels on our state-of-the-art, privately managed Network, not the Internet, ensuring superb call quality and call completion.

SIP Trunking Benefits

Spectrum Business SIP Trunking connects your IP-PBX to the Charter Network where voice calls are prioritized in order to ensure call quality and reliability. Because SIP is an IP protocol, it provides the foundation to add capabilities like unified communications as your business grows and evolves.

How Spectrum Business SIP Trunking Can Help Your Business:

Improve your bottom line
  • Converge voice and data on the same network so you don't pay for separate access
  • Reduce operating costs with only one communications network to manage Count on clear calls and a reliable connection
  • Trust your traffic to the Spectrum Business network which is privately-managed and constantly monitored to ensure performance, security and optimization (your calls will not travel on the open Internet)
  • Redirect calls automatically with disaster recovery
  • Professional customer service team dedicated to Spectrum Business customers and support from local technicians 24/7/365
Keep things simple
  • Get simple pricing for the call paths and features you need and a bill that's easy to understand
  • Look forward to a smooth install and interoperability with an IP-PBX that is certified*
Grow your business efficiently
  • Add or remove call paths easily to handle growth efficiently
  • Get call paths in packs of 4 instead of 23 (as with PRIs), allowing you to grow your network with your business
  • Lay the foundation for unified communications
Grow your business efficiently
  1. First, we'll verify that your IP-PBX is certified* to work with the Charter Network.
  2. Next, we'll work with you to determine the number of concurrent call paths and DIDs you'll need.
  3. Finally, simply pick the long-distance package that makes the most sense for your business.


Voice, Internet and data convergence
Voice, Internet and data services travel over one connection which allows you to reduce costs and simplify network management.
In-bound and out-bound local calling
Allows you to make and receive calls from the local calling area, without incurring long distance charges.
Free on-net calling between sites
All sites included in dialing plan and where the IP network is the preferred path.
Flexible plans
You can pick the number of concurrent call paths, DIDs and a long-distance package which gives you flexibility to pick the best plan for your business.
Simple bill
A block of telephone numbers for calling into a company's private branch exchange (PBX) system that don't require you to pay for a physical line into the PBX for each possible connection.
Block 3rd party and collect calls
Blocks the ability to receive collect calls and 3rd parties to bill charges to a phone allowing you to control costs.
Directory listings
You can publish numbers in local, white, yellow and blue pages to drive business to your company without being restricted to specific directories.
Operator service
Access to an operator for assistance with outbound calls to keep things simple.
Caller ID
Allows for automatic number identification so you can tell who is calling.
911 and e911
Allows the calling number and the physical location of the caller to be transmitted to a 911 operator in the event of an emergency.
24/7/365 customer support
The Charter network is backed by local technicians who are available at any time to assist you.
Call overflow
When all call paths are in use, additional calls get forwarded to another phone number or trunk group so the caller doesn't get a busy signal.
Disaster recovery
The network will redirect traffic to another trunk or any phone number automatically so in the event the network goes down, your voice connection won't.

The following IP-PBXs are certified on the Charter network, however we are contantly working to certify more IP-PBXs. So, please contact a Spectrum Business representative to see if your model is certified and to learn about additional options that are available to your business.

  • 3CX
  • Alcatel-Lucent
  • Allworx
  • Asterisk
  • Avaya
  • Barracuda Networks
  • Cisco
  • Digium
  • Epygi
  • ESI
  • Facet
  • Fonality
  • Interactive Intelligence, Inc. (I³)
  • Ipitomy
  • LG Ericsson
  • Mitel
  • NEC
  • Panasonic
  • Samsung
  • ShoreTel
  • Snom
  • TalkSwitch (Fortinet)
  • Toshiba
  • Vertical
  • Zultys
Not all features available in all markets.