21 Jan
2013
21 Jan
'13
6:36 p.m.
On 21.01.2013 09:56, Dmitry Lysenko wrote:
The problem with other side phone or PSTN gateway. Different delays in voice path, so in one case AEC algo work well, but not for another. WBR.
I made calls to different types of networks: PSTN, VoIP, GSM. About 50% I hear echo. Including calling to same number consequently, echo ay be present or not. -- Mimiko desu.