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SIP stands for Session Initiation Protocol, it is a signalling protocol used for establishing sessions in an IP network.

SIP is the replacement technology of ISDN for the IP world.

Additional benefits are:

  • Lower call costs
  • Ability of FREE Site to Site calls
  • Lower cost than ISDN
  • Faster provisioning timescales than ISDN
  • Unlocks the IP PBX creating a Voice VPN across multiple sites
  • Scalable on a per channel basis
  • Compliments a converged network with lower costs and simplified architecture

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