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Supported Standards


Table : Supported GSMA Standards



IP-based interconnection for wireless networks


Table : Supported IETF Standards


RFC 2327


RFC 2617

HTTP Authentication: Basic and Digest Access Authentication

RFC 2671Extension Mechanisms for DNS (EDNS0)

RFC 2833

RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals

RFC 2865Remote Authentication Dial In User Service (RADIUS)
RFC 2915

The Naming Authority Pointer (NAPTR) DNS Resource Record

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

An Offer/Answer Model with the Session Description Protocol (SDP)

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 3313

Private Session Initiation Protocol (SIP) Extensions for Media Authorization

NOTE:  Supported in pass-through mode only.

RFC 3323

A Privacy Mechanism for the Session Initiation Protocol (SIP)

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 3389

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 3680A Session Initiation Protocol (SIP) Event Package for Registrations

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 3841Caller Preferences for the Session Initiation Protocol (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 4103

RTP Payload for Text Conversation

RFC 4113

Management Information Base for the User Datagram Protocol (UDP)

RFC 4117

Transcoding Services Invocation in the Session Initiation Protocol (SIP) Using Third Party Call Control (3pcc)

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 4572

Connection-Oriented Media Transport over the Transport Layer Security   (TLS) Protocol in the Session Description Protocol (SDP) 

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 4730A Session Initiation Protocol (SIP) Event Package for Key Press Stimulus (KPML)

RFC 4753

ECP Groups for IKE and IKEv2

RFC 4861

Neighbor Discovery for IP version 6 (IPv6)

RFC 4961Symmetric RTP / RTP Control Protocol (RTCP)

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 5627Obtaining and Using Globally Routable User Agent URIs (GRUUs) in the Session Initiation Protocol (SIP)
RFC 5705

Keying Material Exporters for Transport Layer Security (TLS)

RFC 5763


Framework for Establishing a Secure Real-time Transport Protocol (SRTP) Security Context Using Datagram Transport Layer Security (DTLS)
RFC 5764Datagram Transport Layer Security (DTLS) Extension to Establish Keys for the Secure Real-time Transport Protocol (SRTP)

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

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 6347

Datagram Transport Layer Security Version 1.2

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 6891

Extension Mechanisms for DNS (EDNS (0)

RFC 7135

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

RFC 7245

An Architecture for Media Recording Using the Session Initiation Protocol

RFC 7865

Session Initiation Protocol (SIP) Recording Metadata

RFC 7866Session Recording Protocol
RFC 8068Session Initiation Protocol (SIP) Recording Call Flows


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


RTP Payload Format for Opus Speech and Audio Codec


Table : Supported ITU Standards

G.722.1Low-complexity coding at 24 and 32 kbit/s for hands-free operation in systems with low frame loss


SIP Interworking

T.38 v.3

Procedures for real-time Group 3 facsimile communication over IP networks


Table : Supported NENA Standards


08-001 v2 

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

SIP Forum

Table : Supported SIP Forum Standards


SIPConnect 1.0

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

SIPConnect 1.1

SIP-PBX / Service Provider Interoperability

SIPConnect 2.0 Updated guidelines for SIP-PBX / Service Provider Interoperability 


Table : Supported 3GPP Standards


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 26.114IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction

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

3GPP TS 33.328

IP Multimedia Subsystem (IMS) media plane security