XO SIP service is an award-winning converged voice over IP solution that allows you to capitalize on your investment in data and voice communications and get the most from your IP-PBX today.
SIP stands for Session Initiation Protocol. It’s a next-generation IP communications standard that provides IP-PBX customers direct access to our national, private OC-192 IP network for data and voice communications.
In other words, XO SIP allows your IP-PBX to take full advantage of powerful VoIP features and the latest IP telephony applications to maximize your phone system’s performance, boost productivity and improve your bottom line.
Bottom Line Benefits
- Reduce recurring cost of separate Public Switched Telephone Network and data circuits
- Boost bandwidth utilization by eliminating the costly protocol conversion that can hamper end-user productivity
- Eliminate the expense of purchasing, supporting and maintaining media gateways
Award Winning Performance
Awarded 2007 product of the year honors by Internet Telephony Magazine, XO SIP service offers unlimited local calling and unlimited site-to-site calling to your business locations with XOptions® Flex, XO® IP Flex, XO® Flex with VPN and XO SIP service. It’s completely scalable with access options ranging from 1.5 to 45 Mbps. Compatible with leading IP-PBX systems, XO SIP packages contain standard and optional à la carte services and applications, including dynamic bandwidth allocation, voice compression, and virtual Direct Inward Dialing.
Do more with less
Take advantage of powerful VoIP features like dynamically allocated bandwidth, voice compression, and Virtual Direct Inward Dialing.
XO SIP maximizes network efficiency by utilizing a single circuit for voice and data traffic.
With dynamic bandwidth allocation, XO SIP service permits the full use of your IP circuit to support data traffic when voice lines are idle. However, voice traffic always takes priority.
Available voice compression means more simultaneous voice calls on the same bandwidth, which eliminates the need for additional T-1s.
Want to serve multiple markets from a single location? XO SIP’s Virtual Inbound Direct Inward Dial numbers (DIDs) offer the perfect solution. With our virtual DIDs, customers outside your local calling area can make local calls to reach you, giving you a local presence where you want to be.
Our broad selection of features allows you to expand your data and communications capabilities without exceeding your budget.
Standard Features
- Unlimited local calling
- Unlimited site-to-site calling to your company locations with XO IP Flex, XO IP Flex with VPN, and XO SIP service
- Local DIDs
- E911, 411, Operator Services, Directory Listing and Caller ID
- Local Number Portability
- Customizable Calling Plans
- Dedicated Internet Access
- Web-based Online Feature Management
- Managed Router
- Web Basics Hosting Package:
- Ten (10) email accounts with Perimeter Email Protection
- 100 MB of disk space
- 1 GB of bandwidth
Optional Features
- Virtual DIDs – expand your market. Allows customers outside your local calling area to dial local numbers to reach you
- FXS lines for alarm, modem, and fax service
- Voice Compression – increases the number of simultaneous voice channels available
- Network-based Auto Attendant – provides a powerful, flexible tool to field inbound calls and deliver them without going through a receptionist
- Network-based Call Center – provides complete business-ready application for tech support and customer service
- Voice Virtual Private Network – enables calls between multiple locations with a common dial plan
- Business Call Center – helps your company establish technical assistance lines, customer support numbers, or order-taking centers
- Account Codes – helps your business track and allocate calling expenses
- Conferencing services
Bandwidth-Based Pricing
Pricing for XO SIP service is based on your total bandwidth requirements for voice, data or both. Here’s how it works:
- Select a bandwidth requirement from 1.5 to 45 Mbps
- Choose a Calling Plan
- Tailor your solution with optional features
Pricing is available for 1, 2, 3, and 5-year terms.
Pricing and Availability
XO SIP packages are available in more than 75 markets nationwide. Call your XO Sales Representative today at 1.866 963.9696 to help you determine which XO SIP package is best for you.
Download the XO® SIP Product Sheet 
Download the XO VoIP Quick Start Guide 
Download the XO® SIP Brochure 