Supported Features and Protocols

Features

Any to any switching gateway.

•  Ability to run all endpoints/protocols on single software image and appliance

• SS7, Sigtran, SIP, Megaco Media Gateway, Signaling Gateway

• Flexible dial plan to route from any endpoint to any endpoint

Scalable and very high density

• Up to 32 E1 per appliance appliance

• Can scale up to 288 E1s in relay mode where multiple systems act as one

• Transcoding available on all channels

Extensive VoIP Signaling

• SIP, Megaco/H.248

Full featured SS7/Sigtran Signaling

• SS7 ISUP Signaling with several national variants

  • ITU, ANSI, Bellcore, France, UK, China, India and Russia

  • M2UA signaling gateway

ISDN signaling

• Q.931, QSIG,

MFC R2 signaling

Faxing and Media Support

• Pass-through

• T.38

Wide range of narrowband and wideband codecs supported
For any-to-any codec transcoding

• G.711, G.729, AMR

Robust implementation with distribution
Profile Panel, on the fly configuration with no service interruption.

TDM T1/E1 Interfaces

• Electrical G.703.6/G.704 balanced

• Minimum 4 T1/E1

• Maximum 32 T1/E1 (960 ds0/sessions) per appliance

• Transcoding supported on all channels

• Extend capacity over 960 ports via ISUP relay feature and multiple appliances.

Ethernet Network Interfaces

• Two Gigabit network interfaces

VoIP Protocols

SIP

• SIP V2 / RFC 3261 RFC 3261 Session Initiate Protocol

• RFC 2976 SIP INFO Method

• RFC 3398 ISUP-SIP Mapping

• RFC 3515 Refer Method

• RFC 2327 Session Description Protocol

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

• RFC 3892 Referred-By Mechanism

• RFC 3891 "Replaces" Header

• RFC 3551: RTP/AVP

• RFC 3515: REFER

• RFC 2617: HTTP Digest Authentication

• SDP Bypass

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

 Megaco/H.248 & MGCP

• MEGACO Protocol Version 1.0, Internet RFC3525

• H.248.1 Version 1 Implementors’ Guide, 13 April, 2006

• H.248 Sub-series Implementors’ Guide, 13 April, 2006

• ITU-T recommendation H.248.1 Version 3 (09/2005): “Gateway control protocol”

• SDP : Session Description Protocol, Internet RFC 2327 & RFC 4566 

• H.248.2 – Fax etal Package

• H.248.14 – Inactivity Timer Package

• Augmented BNF for Syntax Specifications: ABNF, Internet RFC 2324

• DTMF support

  • RFC 2833/4733 - "RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals"

  • In-band DTMF detection/generation

Call Handling

• H.225.0 : Call signaling protocols and media stream packetization for packet-based multimedia communication systems

• H.245 : Control protocol for multimedia communication

• H.235, H.450, H.460

DTMF support

• RFC 2833/4733 - "RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals"

• In-band DTMF detection/generation

TDM Protocols

SS7

•  TDM

  • ISUP

    • ITU, ANSI, Bellcore, UK, China, France Spirou, India and Russian

    • ITU 88, 92 & 97, 2000, Telcordia 97, ANSI 88, 92, 95 and ETSI v2,v3

      • SPIROU, China, UK, Russia, India

      • SCTP (RFC 2960)

  • MTP3, MTP2, MTP1

    • MTP2

      • ITU 88 & 92, ANSI 88 & 92, Peoples Republic of China

    • MTP3

      • ITU 88 & 92 & ETSI, ANSI 88 & 92, 96  & Telcordia (including ANSI MTP3-B), China

• SS7 over SigTran Packaging (ISUP over IP)

  • SigTran Relay

    • M2UA (RFC 3331) Replay

      • MTP2 level Relay

ISDN

• CCITT 88,                  User & Network Side PRI/BRI

• AT&T 4ESS              User Side - PRI, Network Side - PRI

• 5ESS                           User Side - PRI/BRI, Network Side - PRI/BRI

• DMS-100                   User & Network Side - PRI/BRI

• ETSI                           User & Network Side - PRI/BRI

• Australian Telecom  User Side - PRI/BRI and Network Side - PRI

• National ISDN-1       User Side - BRI

• NTT                             User & Network Side - PRI/BRI

• National ISDN-2       User & Network Side - PRI

• Q.SIG                         (PRI)

• LAPD & TEI Management

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 or SS7 IAM message.

• Deep integration with signaling stacks

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

Media Processing & Transcoding

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

Echo Cancellation & VQE

Telco grade hardware 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 NSG gateway supports multiple DTMF internetworking scenarios.

• RFC 2833 Tone Relay

• In-band

• SIP INFO

• Hardware and software DTMF detection and generation

Management and Configuration

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

• Web GUI

• Profile Sync, on the fly configuration without service interruption.

• Command line interface via ssh and usb to serial

• Call detail records in XML format

• Detailed logs with user configurable file size and auto rotation

Monitoring

• SNMP v1, 2, 3

• RTCP

Accounting

• Radius

Un-Supported Features

The following features/protocols are currently unsupported by NSG:

• TCAP

• SCCP

• TUP

• NSG acting as an STP (NSG is supported as an SSP)

• SIP-I   (some simulated relay is possible)

• Legal Interception

• NFAS (ISDN specific)

• M3UA (RFC 3332) *

  • Requires custom configuration and Vice President Approval

• M2PA