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XO® Enterprise SIP Trunking

Simplify and Manage VoIP Across Multiple Sites

XO Enterprise SIP enables multi-location businesses to streamline the management and reduce the costs of managing enterprise-wide communications. With enterprise SIP trunking, you can leverage a centralized IP-PBX in one or more primary locations and deliver VoIP services to other branch locations using an existing private network or the XO MPLS IP-VPN service.

XO Enterprise SIP can save you time and money:

  • Centralizes and standardizes the management of VoIP
  • Eliminates the need for multiple phone systems and local voice trunks at each of your locations
  • Removes long distance charges among networked sites
  • Dynamically shares voice calling capacity across your entire enterprise, and enables bursting above the purchased voice capacity when needed.

XO Enterprise SIP is a centralized solution that is ideal for multi-location businesses with more than 10 locations that are connected to a MPLS-based network. For a SIP Trunking solution that assists companies with fewer locations to maximize their IP-PBX or SBC investments at each location, consider XO SIP Service.

Enterprise SIP Trunking Network Architecture Diagram:

Enterprise SIP Trunking Network Architecture Diagram:

Nationwide VoIP Coverage

XO Communications is the leading VoIP and SIP Trunking provider, with the largest market share of the VoIP access services market: 1 million business VoIP users. XO Communications VoIP and SIP Trunking serve 2,700 cities and 80% of the major metropolitan markets.

Features and Pricing

XO Communications prices Enterprise SIP trunks based on bandwidth and VoIP sessions instead of lines. Trunks are available in incremental bandwidth options from 1.5 Mbps to 1 Gig. Select the plans and features based on your requirements.

Additional Features include:

  • Business continuity options such as SIP trunk failover or Automatic Call Routing
  • Gain added privacy with encryption options for VoIP traffic
  • Virtual Telephone Numbers for a presence in markets where you don’t have physical offices
  • Bundle with XO MPLS IP-VPN Service and APM for a complete, multi-site IP communications network
  • Secure, self-service web portal where administrators can manage services and features online

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