News ID

G.165 Line Echo Cancellation (LEC) Software for Long Distance Voice Communication

GAO Research Inc.

Toronto, Canada - GAO Research Inc. ( is offering its G.165 line echo cancellation (LEC) software used in long distance voice communication especially in links involving satellite networks and intercontinental long-haul circuits.

This G.165 line echo cancellation software features double-talk detection which avoids divergence during double talk. It cancels electrical line echoes caused by 2-to-4 wire conversion hybrids in telephone lines. The line echo canceller is also designed for integration with other software modules from GAO such as our DTMF Encoder/Decoder to enhance performance.

GAO's G.165 line echo cancellation software is implemented in assembly or C and consists of two user-callable functions which perform echo cancellation and initialization operations. This software is compliant with the ITU G.165 recommendation and is ideal for full-duplex operation.

This G.165 line echo cancellation software belongs to GAO's family of Telephony Software. This line of products provides easy integration into other systems, easy maintenance and a smooth upgrade path for next-generation customer products. It includes Dual Tone Multi-Frequency (DTMF) Software, Voice Activity Detector (VAD), Adaptive Noise Suppression Algorithm and other similar products. GAO provides a complete package for telephony that includes speech compression modules and telephony modules. The software packages can be used for feature phones, Internet phones, multi-channel computer telephony boards, soft PBXs and Voice over IP.

About GAO Research Inc.

GAO Research Inc. ( is a world-renowned provider of high quality, reliable telecommunications software including embedded modem software, fax modem software, speech codes, and telephony software for a wide range of DSPs and microprocessors.