Mitigate Acoustic, Hybrid Echo in PSTN
HIGHLIGHTS
- Ditech is echo cancellation leader
- Nearly 15 years of live network experience
- The "smart choice"
As voice networks migrate from circuit to packet technologies, latency issues are exaggerated and more variable. As wireless networks inter-connect with wireline networks, they must also be protected against hybrid and acoustic echo. For communications providers, this makes it increasingly difficult to provide consistently reliable voice quality.
Ditech Networks is a the global leader in solving these problems, with more solutions deployed worldwide over 15 years than any other equipment maker.
Hybrid echo is a well-understood problem caused by the 4-wire to 2-wire convergence point in wireline networks. The relatively short round-trip delays associated with circuit-switched wireline networks meant that echo cancellers only needed to support short distances. For IP-based networks a much more robust solution is required due to the added conversion requirements.
Additionally, the wide variety of customer devices has created a second, equally critical, voice quality problem for carriers: acoustic echo. This type of echo occurs when signals from the device's speaker are reflected back into the network through the device's microphone.
The amount of acoustic echo varies from device to device and is exacerbated by delays inherint in wireless networks. Acoustic echo can be generated by both the calling and called party, and legacy solutions can only provide unidirectional acoustic echo control.
Ditech Networks' award-winning Echo Cancellation solution solves both problems, and helps carriers deliver consistent, reliable voice quality across the network.