Why Group of Gold Line SIP or GLSIP?

GLSIP is the SIP trunking product developed by the experts of Group of Goldline (GL), one of North America’s most trusted telecommunication product and service providers.

  • Lower cost than fixed trunking
  • Burstable GLSIP trunking to support fluctuating call volumes
  • Global Point of Presence (PoPs)
  • Lower long distance cost
  • Replace/Eliminate expensive PRIs and analog facilities
  • SIP expertise and technical support (24/7)
  • Simplified contracts with no restrictive conditions
  • Virtual Number presence (DID)


Reduce the number of Analog, TDM or PRI trunks


Scalable, burstable, flexible ‘trunk’ utilization


Over 20 years of experience in telecommunications


Sophisticated infrastructure and extensive network for exceptional speed and service quality.

VoIP and SIP

GLSIP utilizes Voice over Internet Protocol (VoIP) technology to deliver quality business communications services. Traditionally, major service providers use Analog, Time Division Multiplexing (TDM) or PRI trunks to allow corporate PBXs to interface with the Public Switched Telephone Network (PSTN), however businesses now are eagerly embracing the convenience and cost savings of Session Initiated Protocol (SIP) as a unified solution for transmitting data, voice, and video signals consistently, securely, and effortlessly.