SCTP Software

Stream Control Transmission Protocol (SCTP), defined by the Signal Transport (SIGTRAN) working group of the Internet Engineering Task Force (IETF), is a transport level datagram transfer protocol that operates on top of an unreliable datagram service such

SCTP is the transport protocol specified by next generation network architectures and is used by SIP, Diameter, GCP (H.248/MEGACO/MGCP), and SIGTRAN User Adaptation (UA) protocol layers. It provides secure and reliable transport, which is a must to fulfill the promise of next generation network services like multimedia messaging.

SCTP works on the basic concepts of associations and streams. An SCTP association is similar to a TCP connection except that it can support multiple IP addresses at either or both ends. An SCTP association is comprised of multiple logical streams, ensuring the sequenced delivery of user datagrams within a single stream. A datagram lost in one stream does not block datagrams in other streams.


Although SCTP is designed to carry PSTN signaling information over the IP network, its generic design can be utilized to provide a reliable transport delivery mechanism for other multimedia and wireless frameworks such as SIP, Diameter, GCP, 4G wireless and so on.

Trillium SCTP protocol software enables telecom equipment manufacturers of Soft Switches, Call State Control Functions (CSCF), IP edge devices, IMS Application Servers, Fixed Mobile Convergence Gateways or other products to:

  • Accelerate time to market
  • Reduce development costs
  • Reduce project risk of internally developed SCTP applications

Product deliverables consist of C protocol source code software, documentation, training, and warranty and technical support.

SCTP services include:

  • Acknowledged error-free non-duplicated transfer of user data
  • Segmentation of user datagram to conform to the path MTU size
  • Sequenced delivery of user datagrams within a stream
  • Optional bundling of multiple user datagrams into one SCTP datagram to improve bandwidth utilization
  • Support for multiple transport addresses at either or both ends of an association to enhance reliability

Additional Specifications

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