Gateway Software Software -- "C" Source Code

 Software for Signaling Interworking

TeleSoft International provides signaling interworking, which includes TeleSoft's Embedded SIP source code software, ISDN protocol stack, QSIG protocol stack and  T1 RBS  E1 R2 CAS protocol stack in order to accelerate development and interoperability testing of your gateway or similar product. TeleSoft's SIP, ISDN, QSIG, CAS R2 and RBS protocol stacks provides the fastest path to market-ready telephone, PBX, gateway and similar products for manufacturers worldwide.

TsGATE is an integrated software SIP to PSTN Gateway software design kit that translates the packetized signaling messages on IP networks to the  messages used on the digital PSTN networks. TsGATE can also be used with analog telephones (POTS, or plain old telephone service).   TsGATE takes advantage of existing proven TeleSoft stacks by combining the CompactSIP SIP stack with the TsLink3 PSTN signaling stacks and integrating these with the TeleSoft SIP-PSTN Interworking Module. TsGATE is an ideal solution for OEMs developing embedded gateways and adapters since the TsGATE Soft Gateway is hardware and RTOS independent and can be ported to a wide variety of platforms to create IP to TDM conversion products.   SIP-SIP "gateways", such as a session border controller or SIP enabled firewall, are best served by the CompactSIP or IMS CompactSIP stack.

SIP-PSTN Signaling Interworking Features

SIP-PSTN Signaling Interworking applications

TsGATE Soft Gateway is ideal for for cost and memory sensitive applications, from a desktop terminal adapter to the largest system.  There are several configurations of TsGate available.  In addition to the configurations listed, protocols may be added to create a gateway with any combination, or all combinations.

SIP-QSIG Gateway software library

This version of TsGATE uses the  CompactSIP protocol stack or IMS CompactSIP protocol stack and the QSIG protocol stack.   QSIG has the most supplementary services defined in the specification, and may be the best choice when it is available.  However, manufacturers choose which QSIG features to implement, and whether to implement QSIG at all in their PBXes and other devices, so "YMMV".  Generally, the Public Switched Telephone System does not support QSIG.

Compliant with RFC 4497 -- Interworking between the Session Initiation Protocol (SIP) and QSIG

Some uses of the QSIG-SIP Gateway SDK:

SIP-ISDN Gateway software library

This version of TsGATE uses the  CompactSIP protocol stack or IMS CompactSIP protocol stack and the ISDN protocol stack.  ISDN allows connection to the Public Switched Telephone System, and has more features than Channel Associated Signaling (CAS).  However, it does not have as many features defined as QSIG does.

Based on RFC 4497, which defines Interworking between the Session Initiation Protocol (SIP) and QSIG, modified for ISDN.

Some uses of the ISDN-SIP Gateway SDK::

SIP-CAS R2 RBS Gateway software library

This version of TsGATE uses the  CompactSIP protocol stack or IMS CompactSIP protocol stack and the T1 RBS  E1 R2 CAS protocol stack. 

The uses of the CAS R2 RBS - SIP Gateway SDK are similar to the uses of the SIP-ISDN Gateway library above.  However, MF-R2 and Robbed Bit Signaling do not have all the features that ISDN and QSIG have.  R2 features vary by country, but in general, R2 has more available features than RBS.

SIP-POTS Gateway software library

This version of TsGATE uses the  CompactSIP protocol stack or IMS CompactSIP protocol stack and TsGATE.  TsGATE has an interface to support analog phones, which are sometimes called "Black Phones" or "POTS phones" (POTS stands for Plain Old Telephone Service"). 

Some uses of the  POTS-SIP Gateway are:

QSIG - ISDN - CAS R2 RBS Gateway software library

This version of TsGATE uses one or more of the ISDN protocol stack protocol stack, T1 RBS  E1 R2 CAS protocol stack and the QSIG protocol stack. 

Tthe QSIG-ISDN-CAS-R2-RBS Gateway SDK is a great addition to the existing TsGare ISDN, CAS and QSIG stacks, but is perhaps misnamed.  This gateway can be used for QSIG-ISDN calls, QSIG-CAS calls, ISDN-CAS calls and also for ISDN, QSIG and CAS calls. It adds a very simple user interface to the powerfull and flexible TsLink3 API.   TsGATE offers a library of code that you would otherwise have to write yourself if you are building a transit (class 4) switch, CO (class 5) switch, PBX, or similar device.

TeleSoft International is a premier supplier of circuit switched telephony and VoIP Protocol signaling stacks & solutions to leading OEMs worldwide. TeleSoft has been selected by more than 250 OEM customers and we continue to provide robust, mature, conformance and interoperability tested solutions to customers who require the best performing software stack solutions.

The TeleSoft protocol software development toolkits (SDKs) offer highly optimized protocol stack solutions that combines very small memory footprints with high performance and no compromises on functionality and scalability. All TeleSoft SDKs are supplied in source code written in ‘C’ for ease of portation.

Telecom and VoIP have needs that are different than data communications, and the industry is just realizing how different VoIP is from datacom.   Telecom protocols are required to be robust, and if VoIP is to be widely accepted, it must be as robust as the existing PSTN.  Doesn't it make sense to license your Voice over IP (VoIP) signaling protocol from the voice experts?

TeleSoft International is the original developer of the TsLink3 range of high performance WAN protocols including SIP, ISDN BRI and PRI, QSIG, CAS E1 R2, T1 RBS, AO/DI, ML-PPP, Frame Relay, X.25, and also a range of hardware reference designs. TsLink3 protocol source code is exceedingly well engineered - tightly coded for performance and compact footprint, with a quality that delivers rock-solid stability.

TeleSoft's foundations go back to 1986 when the first ISDN stack was released. Since then TeleSoft's protocols have been proven in use by more than 200 customers worldwide. World leaders, including AT&T, Cisco, D-Link, Digital Equipment, Fujitsu, IBM, Lucent, Matsushita, Multi-Tech, NTT, Polycom, and Vertical Networks have all used the source code for  TeleSoft's proven protocol software.

Manufacturers license the source code for TeleSoft's proven Protocol Stacks and Reference Designs to get their products to market faster with minimized technical risk and development costs. TeleSoft focuses on developing the software and hardware so that you can focus on manufacturing and shipping your product.