Overview

This is an opensource development project (called OpenSS7) to provide robust and GPL'ed SS7 stack for Linux and other UN*X operation systems. Perhaps we should have called it LinuxSS7, or SS7-For-The-Common-Man, or SS7-For-The-Rest-Of-Us, but we're kinda attached to the name OpenSS7 as this is an opensource project.

Programs

The OpenSS7 Project is involved in a number of specific program areas as are illustrated in the diagram below.

(Click on any of the program areas in the diagram to view an overview of the program area.)

These major program areas are as follows:

• Applications
• SS7 Stack
• ISDN Stack
• IP SS7 Stack
• VoIP Stack
• Media Gateway
• SS7/ISDN Device Drivers
• IP Transport
• Embedded Systems

Applications

The Applications program area includes projects which use the SS7 protocol stack rather than components of the SS7 protocol stack. Traditionally the OpenSS7 Project has not included SS7 applications, however, with stack components close to completion, the scope of OpenSS7 has been expanded to include applications.

The current projects in this area include: SS7 Codecs (Deprecated), GSM/MAP HLR GPRS, SMSC, IN (800/CMS/CLASS/CNAM/LIDB), LNP, ENUM/NAPTR, CS/AIN Call Model, OpenSwitch, Asterisk PBX Integration, and Kannel Integration.

Application project overviews can be viewed here.

SS7 Stack

The SS7 Stack has been the principle focus of the OpenSS7 project for some time. The SS7 stack components provide the various protocol levels of the SS7 protocol. These include MTP Level 2, MTP Level 3, SCCP, TCAP, ISUP and BICC.

The SS7 Stack component overviews can be viewed here.

ISDN Stack

The ISDN Stack is a recent addition to the OpenSS7 project. The ISDN stack component provides ISDN and Q.931-related protocols. These include ISDN Q.921, Q.931, BSSAP, H.225.0, V5.2 and GR-303.

The ISDN Stack component overviews can be viewed here.

IP SS7 Stack

The IP SS7 stack has been a focus of the OpenSS7 project for some time as well. The SIGTRAN stack components provide the basis for redundancy and distribution in OpenSS7 and provide the principle glue between the SS7 protocol levels in a redundant and distributed system. IP SS7 stack components include IPSS7, M2PA, M2UA, M3UA, SUA, TUA and TALI.

The IP SS7 Stack component overviews can be viewed here.

VoIP Stack

The VoIP stack has been a recent focusof the OpenSS7 project. The VoIP stack components provide signalling in the VoIP environment. VoIP stack components include BICC, H.225.0 and SIP-T.

The VoIP Stack component overviews can be viewed here.

MG Switching Stack

The MG Switching stack has been a recent focusof the OpenSS7 project. The MG stack components provide signalling in the MG environment. MG Switching stack components include CH, MX, MG, MGCP and MEGACO.

The MG Switching Stack component overviews can be viewed here.

SS7/ISDN Device Drivers

A number of device drivers are available including the Sealevel ACB56 ISA card (for V.35), the E400P-SS7 and T400P-SS7 quad E1/T1 span cards, and the E100P-SS7 and T100P-SS7 single E1/T1 span cards. In addition, OpenSS7 SS7 and ISDN stacks can be run embedded on the PTI CPC-388 octal E1/T1/J1 cards.

The SS7/ISDN Device Driver overviews can be viewed here.

IP Transport

OpenSS7 has developed IP transport for LiS STREAMS that supports all IP components including Transport Provider Interface (TPI) STREAMS interfaces to Linux native TCP, UDP and RAW sockets. In addition, the IP transport packages support TPI STREAMS interface to our Linux native SCTP stack.

The IP Transport component overviews can be viewed here.

Embedded Systems

OpenSS7 SS7, SIGTRAN and IP transport stacks can run embedded on the CompactPCI CPC-388 octal E1/T1/J1 cards. Systems running Embedded Linux can run all the OpenSS7 components.

The Embedded System overview can be viewed here.