Sintel

TelcoBridges Tmedia TMG7800

TelcoBridges

Telcobridges TMG7800 is a high-density carrier-grade VoIP media gateway supporting up to 131,072 channels with simultaneous SIP, SS7, and SIGTRAN signaling and redundant cluster architectures.

TMG7800 Media Gateway

Introduction

This documentation provides a technical overview of the Telcobridges Tmedia TMG7800, a high-density, carrier-grade VoIP gateway. The document is intended for network architects, system integrators, and operators responsible for deploying and maintaining high-capacity telecommunications infrastructure.

The scope covers system architecture, interface specifications, signaling protocol support, redundancy configurations, management capabilities, and physical environmental constraints.

System Architecture

The TMG7800 utilizes a scalable building-block approach, allowing carriers to configure a single system from 16 to 1,024 T1/E1 lines, 1 to 48 DS3 lines, or 1 to 16 OC3/STM-1 lines per cluster. A single TMG7800 system can control up to 4 clusters, creating a non-blocking switch for up to 131,072 channels.

Core Components

The TMG7800 solution consists of the following primary components:

Component Description
TMG7800-CTRL Manages all system components and performs call control. Supports active/standby redundancy. (Qty: 2 per system)
TMG7800 Telecom Unit Runs signaling stacks, provides TDM/VoIP interfaces, and handles hardware-accelerated media processing. Each unit adds capacity. (Qty: 1 to 16 per cluster)
TMG7800-TMS Provides a non-blocking universal media switched fabric across telecom units and manages system TDM clock. Enables redundancy when a second unit is installed. (Qty: 1 to 2 per cluster, optional)
1+1 Patch Panel Passive TDM facility protection group for two telecom units.
N+1 Patch Panel TDM facility protection group for up to 15 telecom units.

Interfaces and Capacity

The TMG7800 supports a mix of multiple TDM interface types with independent framing configuration per port.

PSTN Interfaces

  • T1/E1: 16 to 1,024 per cluster.
  • DS3: 1 to 48 per cluster (includes 2 BITS interfaces).
  • OC3/STM-1: 1 to 16 per cluster with APS.

VoIP Interfaces

  • Ethernet: Up to 32 ports (100/1000Base-T) per cluster (2 per telecom unit).
  • Connectors: RJ45 on the rear of the unit.
  • IP Addressing: Up to 256 different IP addresses per cluster (16 per telecom unit).
  • Network Features: Ethernet port bonding and 802.1q VLAN support.

Vocoding and Media Processing

The system supports 512 to 32,768 VoIP channels per cluster with universal codecs.

  • Universal Codecs: G.711, G.723.1, G.726, G.729ab, T.38 V.17, Clear Mode (RFC 4040).
  • Additional Codecs: G.722, G.722.2 (AMR-WB), G.728, G.729eg, iLBC, AMR, EVRC, GSM FR/EFR, QCELP, T.38 V.34.

Fax/Modem/Data Support:

  • T.38 fax relay (V.17 and V.34).
  • Automatic G.711 fallback.
  • Modem and data passthrough, NSE, and VBD support.
  • Clear mode (RFC 4040).

DTMF Relay:

  • RFC 2833/4733 and SIP INFO method.
  • In-band support.

Voice Processing:

  • Adaptive and programmable jitter buffer (20 to 200 ms).
  • Voice Activity Detection (VAD) and Comfort Noise Generation (CNG).
  • Echo cancellation: G.168 with a 128 ms echo tail on all channels simultaneously.

Signaling Protocols

The TMG7800 simultaneously supports any combination or all of the following signaling protocols:

SIP

  • Supported RFCs: 2327, 2833, 2976, 3204, 3261, 3262, 3263, 3264, 3311, 3323, 3325, 3326, 3372, 3389, 3398, 3515, 3551, 3555, 3578, 3581, 3665, 3666, 3764, 3891, 4028, 4694, 4733, 5806.
  • SIP-I/SIP-T: Extensive SIP header manipulation.

SS7

  • Links: Up to 512 MTP2 links (56, 64, n x 56/64 kbps) or 32 x HSL.
  • Point Codes: Up to 64 originating point codes and 256 linksets.
  • Destination Codes: Up to 512 destination point codes.
  • ISUP Variants: ITU 92, ITU 97, ANSI 88, ANSI 92, ANSI 95, Q.767, Telcordia 97, ETSI v3, China, Singapore, UK, SPIROU, Japan NTT, Russia.

SIGTRAN

  • Protocols: M2PA, M2UA, M3UA (IPSP, ASP, SG), IUA.
  • Transport: SCTP (raw IP and UDP).
  • Capacity: Up to 512 M2UA / M2PA links; up to 64 M3UA peer server processes.
  • Features: SS7 termination and/or relay supported.

ISDN PRI

  • Standard: Q.931 ISDN PRI (user and network side).
  • Variants: NI-2, 4ESS, 5ESS, DMS-100, DMS-250, Euro ISDN ETSI NET5 (France, Germany, UK, China, Hong Kong, Korea), Euro Numeris (VN6), NTT (Japan), Australia.
  • Features: ISDN NFAS with D-channel backup.

CAS and GR-303

  • MF R1: Includes E&M, loop start, ground start.
  • MF R2: Includes standard ITU, Brazil, Mexico, Venezuela.
  • Customization: Customizable script files to implement any CAS variant.
  • GR-303/H.248: Call control, conferencing, CLIP (H.248.23), and redundancy with no loss of calls.

High Availability and Redundancy

The TMG7800 provides carrier-grade high availability through optional protection schemes.

Tmedia 1+1 Protection

Enables full facility protection for TDM and IP with no single point of failure.

  • Configuration: 1 active unit and 1 standby unit.
  • Hardware: Up to 8 units 1+1 Patch Panel(s) per cluster.
  • Features:
    • Passive protection (no power required).
    • Configuration database redundancy.
    • Seamless software upgrade.
    • M3UA/MTP3/ISUP redundancy.

Tmedia N+1 Protection

Extends high-availability features for larger deployments.

  • Configuration: Up to 15 active unit(s) and 1 standby unit.
  • Hardware: Up to 7 units N+1 Patch Panel(s).
  • Features:
    • Full capacity protection (TDM and IP).
    • Configuration database redundancy.
    • Seamless software upgrade.
    • M3UA/MTP3/ISUP redundancy.

General Redundancy Features

  • Redundant AC or DC power supplies.
  • IP port redundancy.
  • Self-recovery and fault-tolerant software.
  • MTP2/SS7 links redundancy.

Management and Operations

Operation & Administration (OAMP)

  • GUI/CLI: Provisioning, management, and status via GUI; CLI and configuration file machine-to-machine interface (RESTful).
  • Security: Configuration change audit logging, access/user/privilege management.
  • SNMP: V2/V3 GET, TRAPs (alarms), and extensive call statistics MIBs.

Management Ports

  • Ethernet: Up to 4 ports (100/1000Base-T) per system (2 per TMG-CTRL unit).
  • Local: Up to 2 VGA ports and 8 USB ports per system.
  • Serial: Up to 2 DB9 RS232 serial ports per system.
  • Software: GUI-based and CLI system upgrade, configuration copy/backup/restore, and storage for multiple software versions and configuration files.

Northbound API

  • RESTful API for automated provisioning.
  • HTTPS requests for external applications (call routing, fraud protection, robocall mitigation).

Network Analytics (TB Analytics)

  • Live call trace with protocol information and ladder diagrams.
  • Live test call with media playback and recording.
  • TB Sigtrace: Protocol signaling capture into pcap files.
  • Media call recording (scriptable for calling and called numbers).

Example of a RESTful API call for provisioning

# Example: Retrieve system status via RESTful API
curl -X GET https://<tm7800-ip>/api/v1/system/status \
  -H "Authorization: Bearer <token>" \
  -H "Accept: application/json"

// Sample Response
{
  "status": "active",
  "clusters": 4,
  "active_channels": 12450,
  "redundancy": "1+1"
}

Physical and Environmental Specifications

Dimensions and Weight

Component Rack Size Dimensions (H x W x D) Weight
TMG7800 System (per cluster) 3U to 22U 5.25"–38.5" H x 17.4" W x 22" D 60.2–332.4 lbs (27.3–151.4 kg)
TMG7800 Telecom Unit 1U 1.75" x 17.4" x 16" 20 lbs (9.1 kg)
TMG7800-TMS 1U 1.75" x 16.9" x 16" 17 lbs (7.71 kg)
N+1 Patch Panel 1U 1.75" x 16.9" x 16" 12.2 lbs (5.6 kg)
1+1 Patch Panel 1U 1.75" x 16.9" x 5.25" 3.4 lbs (1.6 kg)

Electrical Characteristics

  • System Input: 90 to 260 VAC, 47 to 63 Hz; -40 to -60 VDC.
  • Power Consumption: 616 to 3210W per cluster (depending on configuration).
  • Redundancy: Hot-swap redundant power supplies for all components.

Environmental

  • Operating Temperature: 0 to +70 °C, 95% rel. hum. non-condensing.
  • Storage Temperature: -10 to +85 °C, 95% rel. hum. non-condensing.

Regulatory Compliance

  • Safety: CAN.CSA C22.2, EN 60950-1:2005, EN 60950-1:2006.
  • EMC: FCC Part 15:2013, CE Mark (EN55022:2010 Class A, EN61000, ETSI EN 300 386).
  • Other: RoHS compliant, NEBS level 3 compliant.

Summary

The Telcobridges TMG7800 is a highly scalable, carrier-grade VoIP gateway designed for maximum flexibility and reliability. Key capabilities include:

  • Scalability: Up to 131,072 channels across 4 clusters.
  • Interface Flexibility: Support for T1/E1, DS3, OC3/STM-1, and extensive VoIP/Ethernet options.
  • Protocol Support: Simultaneous operation of SIP, SS7, SIGTRAN, ISDN PRI, CAS, and H.248.
  • High Availability: Optional 1+1 and N+1 protection schemes ensuring five-nines redundancy.
  • Advanced Management: RESTful APIs, TB Analytics, and comprehensive SNMP support for automated provisioning and monitoring.