SBC Specs and RFCs

Owned by Nathaniel Halbrooks
Nov 15, 2023
2 min read

SIP RFC

  • RFC 3261  -  SIP: Session Initiation Protocol

  • RFC 2327  -  Session Description Protocol

  • RFC 2617  -  HTTP Digest Authentication

  • RFC 2976  -  SIP INFO Method

  • RFC 3262  -  Reliability of Provisional Responses in the Session Initiation Protocol (SIP)

  • RFC 3264  -  An Offer/Answer Model with the Session Description Protocol (SDP)

  • RFC 3323  -  A Privacy Mechanism for the Session Initiation Protocol (SIP)

  • RFC 3325  -  Private Extensions to the Session Initiation Protocol (SIP) for Network Asserted Identity within Trusted Network

  • RFC 3326  -  The Reason Header Field for the Session Initiation Protocol (SIP)

  • RFC 3515  -  REFER Method

  • RFC 3551  -  RTP/AVP

  • RFC 3581  -  An Extension to the Session Initiation Protocol (SIP) for Symmetric Response Routing

  • RFC 3892  -  Referred-By Mechanism

  • RFC 3891  -  “Replaces” Header

  • RFC 3966  -  The tel URI for Telephone Numbers

  • RFC 4028  -  Session Timers in the Session Initiation Protocol (SIP)

  • RFC 4566  -  Session Description Protocol (SDP)

 

  • SDP Bypass

  • SBC exports all SS7 parameters via SIP custom X headers.

Call Routing

Configurable and extendable XML-based dial plan and routing rules XML Dialplan can be used to create complex routing scenarios between SIP and TDM.

  • Call routing based on any call parameter present in a SIP message.

  • Ability to use external applications to build complex routing logic*

Media Processing & Transcoding

Wide range of codecs supported for any to any codec negotiation.

  • G.711

  • G.723.1

  • G.726

  • iLBC

  • G.729AB

  • GSM

  • G.722

  • AMR

  • G.722.1

  • OPUS *

  • H263 *

  • H264 *

*  in software transcoding mode only (H263 & H264 passthrough only)

Echo Cancellation & VQE

Telcogradehardware based echo canceling and Voice processing

  • G.168-2002 with 128ms tail

  • Noise cancellation

  • DTMF Removal

  • DTMF Detection

  • FAX Detection

  • Automatic Gain Control

DTMF Detection and Generation

Sangoma SBC  supports multiple DTMF internetworking scenarios.

  • RFC 2833 Tone Relay

  • In-band

  • SIP INFO

  • Hardware and software DTMF detection and generation

Management and Configuration

Sangoma SBC configuration, operation and troubleshooting are designed to be flexible. 

  • Web GUI

  • On the fly configuration without service interruption.

  • Command line interface via sshandusbtoserial

  • Call detail records in XML format

  • Detailed logs with user configurable file size and auto rotation

 

Monitoring

  • SNMP v1, 2, 3

  • RTCP

Accounting

Radius

 

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