Telesis PX24 IP PBX Business Phone System
Design and manufacture IP PBX Business Phone System, Switching System, VoIP Gateway, and Signaling Converter  

Analog E&M Trunks

Telesis Systems Offering Analog E&M Trunks

  • Telesis Business Phone Systems:
    • PX24X Hybrid IP PBX Business Phone System
  • Telesis Switching Systems:
    • X1 Large Capacity TDM - IP Telephony Switch

Technical Specifications

The analog E&M trunk card has four line circuits that satisfy conditions for AT&T Type-V connections. Each port may individually be set to either a two- or four-wire interface by appropriate configuration of the on-the-board jumpers. The Xymphony operating software supports many different line and register signaling types over the E&M lines. An additional detector on the M-wire checks the DC feed on the line for faulty conditions at far-end equipment. The analog E&M trunk card is available for 600 ohm resistive reference impedance. Each E&M port can be programmed as incoming, outgoing, bothway trunk, or unavailable.

Analog E&M trunks in Telesis systems

Telesis systems have analog E&M trunks to connect to PSTN or private network

Signaling on analog E&M trunk lines

  • Pulsed line with decadic-address signaling
  • Continuous line with DTMF, MFC-R2, MF-R1 register signaling
  • Signaling types widely employed in CIS countries:
    • ANI (Automatic Number Identification) detection and query
    • Address signaling
      • Dial Pulse
      • MFC-R1.5
      • Pulse Packet 1
      • Pulse Packet 2
      • Pulse Packet 3a
      • Pulse Packet 3b
    • Line signaling
      • CL-1B
      • OCL-1B
      • TCL-1B

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