SIP-Based ISDN PRI Gateway

The ITG-7004, SIP-Based ISDN PRI Gateway, gives the NGN-Cored Fixed-Line Operators and large enterprise unprecedented value in a high-function gateway. The ITG-7004 is designed to provide connectivity between PSTN and carrier VoIP networks or enterprise private VoIP SIP-based networks. The ITG-7004 is interop-proven with
commonly deployed central office and SIP-based telephony servers.

High performance voice-processing capability is the most important requirement and measurement for all VoIP gateways. The ITG-7004 configured with one to four ISDN PRI E1/T1 interfaces can process up to 120 simultaneous VoIP and/or FoIP calls without concentration. The Gateway Card embeds powerful DSP technology to support G.711,G.729A, G.723, G.168 echo cancellation, DTMF relay RFC2833, and T.38 fax relay.

  • Flexible protocol translation
  • E1/T1 configurable with ISDN, or CAS signaling
  • Fully equipped VoIP DSP for non-concentration concurrent calls
  • Network-side or User-side ISDN PRI function
  • Auto dialing and 2nd-stage dialing
  • DTMF detection and generation
  • Play ring-back tone
  • T.38 fax relay
  • Interoperate with SIP-based application servers, and media servers
  • Completed SNMPv2 management functions


  • Standalone model for 4 ISDN PRI

  • Call Control and Signaling

  • ITU-T Q.923/ANSI, PSTN ISDN PRI Standard
  • SIP Standard: RFC3261, RFC2976, RFC3581
  • DTMF Tone , Generation, and Detection
  • DTMF Relay: RFC2833, INFO (SIP)
  • Called/Calling Party Number Translation
  • Second-Stage Dialing, Auto Dialing
  • Ring-back Tone Generation

  • Fax Relay

  • G.711 pass-through and T.38 Fax Relay

  • Management Interfaces

  • RS-232 Local Console, 10/100M-based Ethernet EMS, In-band management, Telnet, SSHv2, SNMPv2, GUI EMS

  • SIP/WAN Interface

  • Two 10/100/1000BaseT RJ-45n


    ISDN PRI Interface

  • E1: 120ohm,RJ-48C
  • T1: 100ohm,RJ-48C

  • LAN Interface

  • BFour 10/100BaseT RJ-45

  • Power & Environmental

  • Power Supply
    • AC: 90~240V 50/60Hz
    • DC: -42V~60V
  • Power Consumption: Less than 50 Watts,
  • Temperature (Operation): 0 °C~ 45 °C (Storage): -25 °C~ 75 °C
  • Operation Humidity: Up to 90% RH, non-condensing

  • Subrack / Models

  • Dimensions: 487mm x 310mm x 44.5mm (WxDxH)
  • 19”rack mountable pizza box in 1U height