Service Provider VoIP Gateways

IMG 2020 Media Gateways

The Sangoma IMG 2020 Integrated Media Gateway enables interworking between IP and PSTN networks via high-density optical, telephony, and Ethernet connections in a compact 1U form factor. It transforms media and signaling to support efficient and reliable voice, fax, modem, and tone-based sessions for mobile and cloud-based applications. The IMG 2020 secures sessions across IP and mixed network boundaries in support of service-level agreements.

The combination of a Time Division Multiplexing (TDM) to IP gateway, any-to-any signaling and Session Border Controller (SBC) functionality in a single chassis within the IMG 2020 offers the potential for significant reductions in CapEx and OpEx when compared to less integrated alternatives.

The IMG 2020 Media VoIP gateway is available in:

  • 128 - 768 TDM channels per 1U shelf with Rear I/O Type 1 (scalable from 4 E1/5 T1 to 24 E1/T1)
  • 672 - 2016 TDM channels per 1U shelf with Rear I/O Type 2 (supports either Optical 0C3 interface or 3 DS3s)
  • 100 - 4500 VoIP channels per 1U shelf 50 to 2250 VoIP sessions​​

Gateway Applications

Mobile Based

Provide SMS, MMS, and location base services (through HLR) by interconnecting directly into the mobile network which uses SS7 signaling.

High Density Call Completion

Provide competitive, long distance, and large scale using cost-effective NetBorder SS7 gateways with signaling and media combined in a single platform.

SIP Network to SS7 Interconnect

Provide high-value VoIP services to your customers by enabling fast connection time and lower phone charges.

Caller Ring Back Tone Solution

Carriers can provide Caller Ring Back Tone to their customers as an additional service.

Gateway Features


Scalable IP and TDM connectivity solution provides high performance in a small footprint to help lower OpEx and CapEx.  

Combined IP and TDM Gateway

Integrated multimedia gateway features facilitate TDM and IP interworking to provide service delivery flexibility and automated failover between domains.

Any-to-Any Signaling and Media Support

Support for SS7, SIP signaling, and IPv6 and IPv4 interworking along with voice transcoding provides a cost-effective platform to help service providers evolve from a TDM to an all-IP environment.

Integrated Encryption and Transcoding

Eliminates the need to add separate hardware to support both security and transcoding requirements, helping to reduce CapEx and number of platforms deployed.  Support for voice, tones, and fax.

SIP Profiler, Web-based User Interface, and Offline Configuration

Easy-to-use service configuration and management tools can help accelerate service deployment and simplify platform management.

Carrier Class Solution

Carrier class design and features provide high availability, reliable throughout and enhanced service delivery.

Gateway Specifications

IP Interface

  • LAN IP Dual redundant 100/1000 Base-T Ethernet for control; 2 - 100/1000 Base-T Ethernet Aux ports (reserved for later use)
  • WAN IP 4 - 100/1000 Base-T Ethernet for VoIP payload and signaling I/O Interfaces — Rear I/O Type 2 — High Density
  • Telephony — T1 and E1, OC3/STM-1, and DS3
    -1 to 3 DS3 + 4 - T1/E1 for timing (BITS clock), signaling and bearer traffic
    -1 OC3/STM-1 with Automatic Protection Switching (APS) + 4 T1/E1 for timing (BITS clock), signaling, and bearer traffic (T1 — 100 ohms and E1 — 120 ohms)
    -Clock Sync Stratum-3 via T1/E1 interface or OC-3/STM-1 interface
  • Optical Transceiver - Hot plug LC connector type SFP modules (1310 nm 15 KM)

TDM Signaling Protocols

  • ISDN PRI (FAS and NFAS): NI2, Euro ISDN, DMS 250, 5ESS, JATE/Japan INS-NET1500, ISDN Net 5
  • Q.699 ISDN to SS7 mapping
  • ISDN/SS7 UUI mapping to SIP
  • SS7/C7 ISUP: ITU, ETSI and ANSI variants supported through the Dialogic® Programmable
  • Protocol Language (PPL); JT-ISUP with TTC, PTC 331
  • SS7 TCAP for message-waiting-indication (MWI) and Caller Name (CNAM) service
  • 64 SS7 links in standalone configuration
  • 128 SS7 links in redundant configuration
  • A-links and F-Links supported
  • E1 to DS3 mapping for third-party multiplexor compatibility
  • ISDN call transfer and bridging via Explicit Call Transfer, Two B Channel Transfer, and Release Link
  • Trunking (initiated via SIP REFER)
  • ISUP call transfer and bridging via Explicit Call Transfer (initiated via SIP REFER)
  • Delayed ANM for ISUP (triggered by third-party SIP call transfers)
  • ISDN and ISUP Multilevel Precedence and Preemption (MLPP)

IP Protocols

  • H.323
  • H.323 v2
  • H.323 RAS, H.245, and H.225
  • H.323 Tunneling H.246 Annex C – ISDN User Part Function — H.225.0 Interworking

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