Baseline 2023

Newly available

Since May 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The RTCSctpTransport interface provides information which describes a Stream Control Transmission Protocol (SCTP) transport. This provides information about limitations of the transport, but also provides a way to access the underlying Datagram Transport Layer Security (DTLS) transport over which SCTP packets for all of an RTCPeerConnection's data channels are sent and received.

You don't create RTCSctpTransport objects yourself; instead, you get access to the RTCSctpTransport for a given RTCPeerConnection through its sctp property.

Possibly the most useful property on this interface is its maxMessageSize property, which you can use to determine the upper limit on the size of messages you can send over a data channel on the peer connection.

EventTarget RTCSctpTransport

Instance properties

Also inherits properties from: EventTarget.

RTCSctpTransport.maxChannels Read only

An integer value indicating the maximum number of RTCDataChannel objects that can be opened simultaneously.

RTCSctpTransport.maxMessageSize Read only

An integer value indicating the maximum size, in bytes, of a message which can be sent using the RTCDataChannel.send() method.

RTCSctpTransport.state Read only

A string enumerated value indicating the state of the SCTP transport.

RTCSctpTransport.transport Read only

An RTCDtlsTransport object representing the DTLS transport used for the transmission and receipt of data packets.


Listen to these events using addEventListener() or by assigning an event listener to the oneventname property of this interface.


Sent when the RTCSctpTransport.state changes.

Instance methods

This interface has no methods, but inherits methods from: EventTarget.




WebRTC: Real-Time Communication in Browsers
# rtcsctptransport-interface

Browser compatibility

BCD tables only load in the browser

See also