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Availability: Since 4.2.4



The SBC Core supports the following standards:

Table : Supported Standards


RFC 2327


RFC 2407The Internet IP Security Domain of Interpretation for ISAKMP

RFC 2617

HTTP Authentication: Basic and Digest Access Authentication

RFC 2833

RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals

RFC 2865Remote Authentication Dial In User Service (RADIUS)

RFC 2976


RFC 3087

Control of Service Context using SIP Request-URI

RFC 3204

MIME media type ISUP

RFC 3261

Session Initiation Protocol

RFC 3262

Reliability of Provisional Responses

RFC 3264

Offer/Answer Model

RFC 3265

SIP-Specific Event Notification

RFC 3267 (2002)

Real-time Transport Protocol RTP Payload Format and File Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) Audio Codecs

RFC 3311


RFC 3312

Integration of Resource Management and SIP

RFC 3323

Privacy Mechanism

RFC 3324

Short Term Requirements for Network Asserted Identity

RFC 3325

Asserted Identity

RFC 3326 (2002)

The Reason Header Field for the Session Initiation Protocol (SIP)

RFC 3327

SP Extension Header Field for Registering Non-Adjacent Contacts

RFC 3372


RFC 338

Real-time Transport Protocol (RTP) Payload for Comfort Noise (CN)

RFC 3398

ISUP to SIP Mapping

RFC 3411

An Architecture for Describing SNMP Management Frameworks

RFC 3412

Message Processing and Dispatching for SNMP

RFC 3413

Simple Network Management Protocol (SNMP) Applications

RFC 3414

User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)

RFC 3415

View-based Access Control Model (VACM) for the SNMP

RFC 3418

Management Information Base (MIB) for the SNMP

RFC 3420

Internet Media Type message/sipfrag

RFC 3428

SIP Extension for Instant Messaging

RFC 3515

SIP Refer Method

RFC 3550 (2003)

RTP: A Transport Protocol for Real-Time Applications

RFC 3551 (2003)

RTP Profile for Audio and Video Conferences with Minimal Control

RFC 3581

SIP Extension for Symmetric Response Routing

RFC 3584

Coexistence between Version 1, 2 and 3 of the Internet-standard Network Management Framework

RFC 3605

RTCP Attribute in SDP

RFC 3608Session Initiation Protocol (SIP) Extension Header Field for Service Route Discovery During Registration

RFC 3711

Secure Real-time Transport Protocol

RFC 3824

Using E164 numbers with the Session Initiation Protocol (SIP)

RFC 3826

The Advanced Encryption Standard (AES) Cipher Algorithm in the SNMP User-based Security Model

RFC 3840

Indicating User Agent Capabilities in SIP

RFC 3842

A Message Summary and Message Waiting Indication Event Package for the SIP

RFC 3891

The Session Initiation Protocol (SIP) "Replaces" Header

RFC 3892

The SIP Referred-By Mechanism

RFC 3960

Early Media and Ringback Tone Generation in the Session Initiation Protocol

RFC 3966

The tel URI for Telephone Numbers

RFC 4022

Management Information Base for the Transmission Control Protocol (TCP)

RFC 4028

Session Timers in SIP

RFC 4113

Management Information Base for the User Datagram Protocol (UDP)

RFC 4123

Session Initiation Protocol (SIP)-H.323 Interworking Requirements

RFC 4145

TCP-Based Media Transport in the Session Description Protocol (SDP)

RFC 4244

An Extension to the Session Initiation Protocol (SIP) for Request History Information

RFC 4293

Management Information Base for the Internet Protocol (IP)

RFC 4412

Communications Resource Priority for the Session Initiation Protocol (SIP)

RFC 4458

Session Initiation Protocol (SIP) URIs for Applications - Voicemail and Interactive Voice Response (IVR)

RFC 4566

Session Description Protocol

RFC 4567

Key Management Extensions for SDP and RTSP

RFC 4568

SDP Security Descriptions for Media Streams

RFC 4573

MIME Type Registration for RTP Payload Format for H.224

RFC 4583

Session Description Protocol (SDP) Format for Binary Floor Control Protocol (BFCP) Streams

RFC 4585

Extended RTP Profile for RTCP-Based Feedback (RTP/AVPF)

RFC 4753

ECP Groups for IKE and IKEv2

RFC 4861

Neighbor Discovery for IP version 6 (IPv6)

RFC 4975

Message Session Relay Protocol (MSRP)

RFC 5104

Codec Control Messages in the RTP Audio-Visual Profile with Feedback (AVPF)

RFC 5168

XML Schema for Media Control

RFC 5227

IPv4 Address Conflict Detection

RFC 5343

Simple Network Management Protocol (SNMP) Context EngineID Discovery

RFC 5547

SDP Offer/Answer Mechanism To Enable File Transfer

RFC 5590

Transport Subsystem for the Simple Network Management Protocol (SNMP)

RFC 5626

Managing Client-Initiated Connections in SIP

RFC 5806

Diversion Indication in SIP

RFC 5996

Internet Key Exchange Protocol Version 2 (IKEv2)

RFC 6044

Mapping and Interworking of Diversion Information between Diversion and History-Info Headers in SIP

RFC 6135

Alternative Connection Model for MSRP UA

RFC 6140

Registration for Multiple Phone Numbers in the Session Initiation Protocol (SIP)

RFC 6223

Indication of Support for Keep-Alive

RFC 6337

Session Initiation Protocol (SIP) Usage of the Offer/Answer Model

RFC 6442

Location Conveyance for the Session Initiation Protocol

RFC 6714

Connection Establishment for Media Anchoring

RFC 6716

Definition of the Opus Audio Codec

RFC 6733

Diameter Base Protocol

RFC 7135

Registering a SIP Resource Priority Header Field Namespace for Local Emergency Communications

SIPConnect 1.0

Direct IP peering between SIP-enabled IP PBXs and VoIP service provider networks

SIPConnect 1.1



IP-based interconnection for wireless networks


SIP Interworking


New Parameters for the 'tel' URL to Support Number Portability and Freephone Service


RTP Payload Format for Opus Speech and Audio Codec

3GPP TS 24.229 v11.5.0

IP multimedia call control protocol based on SIP and SDP

3GPP TS 23.167

IP Multimedia Subsystem (IMS) emergency sessions.  

3GPP TS 29.214

Policy and Charging Control over Rx reference point

3GPP TS 32.260

IP Multimedia Subsystem (IMS) charging

3GPP TS 32.299

Diameter Charging Applications

08-001 v2 

Interim VoIP Architecture for Enhanced 9-1-1 Services (i2)

ITU T.38

Procedures for real-time Group 3 facsimile communication over IP networks, (v.3)


The following public websites provide standards definition details.