Tieline Gateway-4 Four Channel IP Codec










Introducing the New Generation 4 Channel IP Audio Codec

Gateway-4 Delivers Best-In-Class DSP-Based Reliability And Performance
The new generation Gateway-4 delivers best-in-class DSP-based reliability and performance for mission critical broadcast streaming applications. It is ideal for:

  • Remote broadcast applications.
  • Studio-to-Transmitter Links (STLs)
  • Studio-to-Studio Links (SSLs)

The Gateway-4 is designed for solutions requiring up to 4 audio streaming channels with advanced redundancy features and remote configuration and control. It supports 4 full-duplex audio channels in 1RU and is backward compatible with all Tieline IP codecs. The Gateway-4 provides two stereo connections, or one stereo and two mono connections, or up to 4 mono connections.

The Gateway includes support for AES67, ST 2110-30, AES3 and analog I/O as standard.






  • Analog, AES3 – Support for AES67, plus AES3 (AES/EBU)
    and analog I/O options
  • Wi-Fi (USB Dongle) – Expand your network options and connect over Wi-Fi networks
  • SIP and IP Intercoms – SIP EBU Tech 3326, 3368, and EBU Tech 3347
  • Dual AoIP Ports^ – Stream AoIP from dual ports
  • SD card – SD card slot for firmware upgrades, storage and SDIO
  • Dual USB ports – Dual USB ports support firmware upgrades, storage and Wi-Fi modems.
  • Dual Internal Power Supplies – Dual power supplies provide backup if one fails
  • Dual Ethernet Ports – Connect using different Telcos for diversity using SmartStream PLUS redundant streaming
  • Module Compatible* – Module slot for future hardware innovations
  • Multi-Unicast – Support for multi-unicasting to up to 20 endpoints
  • Alarms – Silence Detection, PSU Failure, Lost connection, Temperature, AES Input, AES Reference, SNMP and more
  • Expanded Backup Options – Multiple levels of power, audio and network redundancy. The codec features dual Gigabit Ethernet ports, dual internal power supplies, automated audio silence detection and IP network backup solutions to ensure you’re always on the air.

Technical Specification

Technical Specifications


  • Robust dual DSP-based architecture designed for rock solid, mission critical STL audio
  • Linear PCM16/24 bit 32kHz, 44.1kHz, 48kHz, 96kHz sampling
  • Up to 4 bidirectional mono streams, bidirectional stereo plus mono, or 2 bidirectional stereo streams
  • Multicasting an audio stream to a maximum of 20 multi-unicast audio streams
  • Streaming in multicast server mode to unlimited endpoints over compatible IP networks.
  • Popular algorithms including LC-AAC, HE-AAC v1 and v2, AAC-LD, AAC-ELDv1 and v2, Opus, MPEG II, MPEG Layer-3, Tieline Music and MusicPLUS, G.722 and G.711.
  • Low-delay, cascade resilient aptX® Enhanced algorithm*
  • Optional WheatNet-IP card*
  • Up to 2 stereo or 4 mono WheatNet-IP audio channels in/out.


  • Dual Gigabit (10/100/1000) Ethernet ports support automatic switching for redundancy
  • Dual AoIP ports for AES67 / SMPTE ST 2110-30 audio over IP streaming; supports 2 AES67 streams
  • Connect over Wi-Fi using USB Wi-Fi dongles*
  • Optional Gateway Euro ISDN module for connectivity over ISDN networks. Supports 2 B-channels
  • Automated failover to backup connections.
  • Support for up to 4 output audio source fail over options
  • SmartStream PLUS dual redundant IP streaming
  • Fuse-IP network bonding (data aggregation)
  • SIP (SDP) compliant with EBU N/ACIP Tech 3326 and 3368 for interoperability with other codecs
  • I3P EBU Tech 3347 integration for Intercom compatibility over IP
  • Deterministic SIP answering and call routing: Configure up to 16 SIP accounts and connect up to 2 SIP interfaces
  • Selectable fixed or automatic jitter buffer: 5 automated settings available to manage network connectivity and avoid dropouts (includes configurable min and max buffer settings).
  • Configurable Forward Error Correction (FEC)
  • Highly advanced error concealment strategies
  • Real-time IP connection packet statistics
  • Real-time IP link quality displayed.
  • Support for Line Hunt dialing/answering and caller IDs using Tieline IP


  • Full hardware front panel interface including navigation, LCD display, PPM meters and dialing key pad
  • User-friendly HTML5 Toolbox Web-GUI enables codec configuration and control remotely over WANs
  • AES67 Web-GUI for configuration of AES67 and ST 2110-30 audio streams over an AES67 LAN; supports 2 AES67 streams
  • Toolbox Scheduler supports loading/unloading, connecting and disconnecting programs
  • Use the Cloud Codec Controller to configure & manage your entire codec network remotely
  • The TieLink Traversal Server makes dialing easy with centralized contact list management and self discovery of codecs within customized call groups*
  • Auto switching, dual internal AC power supplies
  • IPv4 & IPv6 compatible and ready
  • Asymmetric algorithmic encode/decode
  • Integrated alarm management including automatic silence detection
  • Low latency in-band RS-232 aux data channel
  • Configurable software rules engine via web-GUI for Control Port (8 GPIOs), plus WheatNet-IP LIO* compatibility.
  • Upgrade firmware from SD card or USB sticks*
  • Backup and restore configuration via USB sticks
  • Automated firmware upgrade notifications via Web-GUI
  • Support for multiple languages: English, Spanish, Portuguese and French*
  • Backward compatible with all Tieline IP codecs


  • User name and password protection of codec and Toolbox HTML5 Web-GUI
  • Support for SSL Security Certificate installation
  • SIP allow lists and deny lists allow filtering of SIP URIs and User Agents.
  • Configuration of non-standard ports
  • Firewall settings to enable or disable a range of firewall-related network services, or limit ping to only work in a local subnet
  • Implementation of CSRF protection (Cross-Site Request Forgery)
  • Cloud Codec Controller supports admin and user level access to codecs with password protection

Product Resources

Product Resources

Gateway 4 Data Sheet

Comments are closed.