QSIG-ISDN-CAS R2 RBS Gateway Software -- "C" Source Code


QSIG-PSTN-CAS R2 RBS Software for Signaling Interworking

A good QSIG-PSTN signaling interlocking, which an ISDN protocol stack, a T1 RBS  E1 R2 CAS protocol stack, and a QSIG protocol stack will accelerate development and interoperability testing of your gateway or similar product. Good QSIG and ISDN protocol stacks provides the fastest path to market-ready ISDN products for manufacturers worldwide.

An integrated software QSIG to PSTN Gateway software design kit will translates the signaling messages on SIP networks to the  messages used on the digital PSTN networks.

Qualities to look for in QSIG-PSTN Signaling Interworking include:

  • World-wide PRI, QSIG, BRI software Signaling Stacks
  • Large selection of CAS -- E1 R2 and T1 Robbed Bit Signaling (RBS) stacks.
  • QSIG-PSTN software Interworking Module
  • ITU Standards-based software
  • Processor and RTOS independent software
  • Based on field-proven software stacks
  • Written in ANSI C source code for ease of portation
  • Developed for embedded applications

Small Gateway QSIG-PSTN applications:

The small RAM and ROM footprint of a software development toolkit that is targeted to embedded systems means that you can save memory.  And a fast execution speed allows use of a slower processor;  fewer instruction cycles means that the processor can "sleep" more thereby lowering power requirements which increases battery life. 

These devices may route calls from an office's telephones to a private network, while routing selected calls to the public switched network.

  • Terminal Adapters
  • PBX-PBX Protocol Adapters
  • Key Systems

Large Gateway SIP-PSTN applications:

The low per-call memory requirement of an SDK targeted for very large systems means that you can save a significant amount of memory when your gateway services thousands and tens of thousands of calls.  And the fast execution time results in more calls per MIPS, or in lower power requirements for a given number of calls.  This translates into lower power requirements for your system, less heat generated by the processor, lower air conditioning requirements--in short, better NEBS performance.

These devices may enable a standard PBX to connect to both public and private networks,

  • Legacy PBX to Private Network adapter
  • Legacy PBX to ISDN
  • PBX or CO switch adjunct device