Signaling protocols

Signaling refers to the system of messages required to set up and tear down telephone calls between the calling and the called parties.

TelcoBridges and Signaling Protocols

TelcoBridges provides support for the following signaling protocols:

• PSTN
  • SS7/C7
    • (20+ variants) MTP2, MTP3 and ISUP
  • ISDN PRI
    • (14+ variants), National ISDN-2, Euro ISDN, DMS100, DMS250, 4ESS, 5ESS, Japan INS-NET1500
  • CAS (Script-oriented approach):
    • CASR1:
      • E&M "Wink start" or "Delay start"
      • Loopstart (FXO and FXS sides)
    • CASR2:
      • generic(ITU base specification)
      • Brazil
      • Mexico

• IP
  • SIP RFC 3261 User Agent, SIP Authentication
  • SIGTRAN
    • M2UA, M2PA and M3UA

Important Notes

• TelcoBridges Tmedia devices also offer the conversion of signaling messages between nodes that use different signaling protocols
• All supported protocols can be used simultaneously.