Gateway’s Flexible AoIP Options

Gateway’s Flexible AoIP Options Deliver Interoperability

The Gateway and Gateway 4 are Tieline’s latest codecs.  They are often ‘edge’ devices in IP networks bridging between distant wide area network (WAN) nodes that may include the broadcast plant, other studios (inter-studio links), production facilities and live events. Broadcast engineers seek AoIP devices that can transcend multiple technological standards and traverse across LANs, WANs and the public internet, a gateway of sorts with simple monitoring and control. Why is this so important? Interoperability delivers greater flexibility when integrating IP audio streams into the broadcast plant from a range of sources.

Interoperability Improves AoIP Workflows

Gateway and Gateway 4 codecs are compliant with AES67 and SMPTE ST 2110-30 for audio transport. These standards provide the framework for transporting uncompressed PCM audio around the broadcast plant. The AES67 and ST 2110-30 standards support Session Description Protocol (SDP) for configuring the number of audio channels per stream, encoding format, bits per sample, sampling frequency and number of samples in a packet.

Even if studios install equipment using proprietary AoIP protocols such as WheatNet-IP, Livewire+ or Dante, in the real-world broadcast engineers often need the ability to connect and stream between equipment from different vendors. This is where AES67, RAVENNA, and ST 2110-30 for those in the TV world, provide a high degree of interoperability with proprietary protocols such as Dante and Livewire+ (in AES67 compatibility mode).

Tieline codecs stream AES67 and ST 2110-30 compliant digital audio between equipment from manufacturers supporting these standards. They also support installation of an optional WheatNet-IP card. This provides a flexible platform for routing audio between a range of equipment using proprietary AoIP protocols like WheatNet-IP, as well as devices supporting RAVENNA, AES67 and ST 2110-30.

AES67 and ST 2110-30 only address stream transport, packet setup and synchronization (timing). Nothing is mandated regarding discovery.

Gateway's Flexible AoIP Options
Gateway’s Flexible AoIP Protocol Options

Simplifying IP Stream Discovery and Advertisement

Tieline codec configured as a Blade in Navigator
Tieline codec configured as a Blade in Navigator

Tieline offers optional WheatNet-IP cards at purchase to interface directly with a WheatNet-IP network. Codecs then appear as Blades and seamlessly support stream discovery, advertisement and control using Wheatstone’s Navigator software. There are also other options for stream discovery and advertisement.

Interoperability with NMOS and RAVENNA

Gateway and Gateway 4 codecs are compliant with AMWA NMOS standards IS-04 and IS-05 which delivers discovery, registration, and ultimately control for ST 2110 AoIP streaming. NMOS data models and open standard APIs deliver a new level of interoperability and control with networked equipment throughout the stations and networks.

RAVENNA Destinations displaying flexible AoIP streaming options
RAVENNA destinations displaying flexible AoIP stream options

NMOS will deliver more functions and greater interoperability between IP devices from different vendors over time. More straightforward interoperability between products is important as it allows end users and service providers to build better systems with streamlined management and control options.

Many broadcast networks around the world use RAVENNA for stream discovery and advertisement. The recent integration of RAVENNA allows Tieline codecs to perform these tasks over RAVENNA AoIP networks.

For more information on Gateway and Gateway 4 codecs visit or contact Tieline sales:

(Gateway’s Flexible AoIP Options, first published on 14th October, 2021)


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