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GL Communications Inc. a global leader in telecom test and measurement solutions, announced its insight into our T1 E1 Protocol Analyzer software supporting legacy protocols (CAS - MFCR2, E&M, SS1/SS4, SS5) analysis and emulation- applicable to Federal Aviation Administration "FAA" within their National Airspace System "NAS" Ground-to-Ground Air Traffic Control Network and Voice System (NVS) to Analog Interphone.
Mr. Vijay Kulkarni CEO of the GL Communications Inc said,” Signaling that occurs between switches (such as PBXs, local exchange carrier and interexchange carrier) in telephone networks is sent either within the voice traffic or on a separate dedicated signaling channel.
The Channel Associated Signaling (CAS) is a method of signaling where a channel or timeslot carrying speech also carries with it the signaling and addressing to set up and tear down calls. This supervisory signaling is carried as "on-hook" and "off-hook".
The addressing is carried as DTMF (Dual Tone Multi Frequency) or as MF (Multi Frequency). This form of signaling is still used to route calls on the public switched telephone network (PSTN) including subscriber lines like 2wire local loops, on trunks between central offices (CO), and on access trunks such as PBXs.”
He further added, “GL’s CAS and SS1 legacy protocol test solution supports simulation and analysis of Signaling and voice communications interface between the National Airspace System (NAS) Voice System (NVS) and the legacy NAS Voice Switches, utilizing Ground to Ground (G/G) trunks that support Analog interphone call processing.”
“GL's T1/E1 Cards and USB units provide T1 and VF I/O jacks through which one can monitor or inject audio signals from or onto a designated T1 timeslot, or VF line. The T1/E1 hardware test platform along with Analyzer and Emulator supporting legacy protocols can generate Selective SS-1/ SS-4, SS-5 Signaling, Voice Call Signaling, 2-wire Call, Single Frequency Signaling, MFC-R2 Analog, E and M signaling types of signalling and voice being carried over communication channel and is also capable of analyzing these signaling in real time.”
Some of the important Legacy Protocols Simulation
SS5/ATS-No.5 Call Simulation