Server to server SIP trunks are very useful and easy to configure.

DNIS is used to send and receive calls between servers

Usage Cases Implementing DNIS:

• SIP TIE trunks:
  • A private network is created to dial extensions between systems using Access Codes
• Tandem Dialing:
  • PSTN resources available to a remote server are shared to the local server
• PSTN re-routing to a networked ScopTEL Server