On 7/12/09 8:11 AM, Dubravko Caric wrote: > Hi all, > we have > this annoying problem with Linksys SPA9x2 phones and echo cancellation. I > have read > posts on other sites about this problem but they are more than one year old > and > people were using older firmware. Linksys/Cisco has released 6.1.5a firmware > but we still experience the same problems. SPA phones have low sound volume of > handset microphone and people on the other side (PSTN, GSM) are complaining > that they hear us very badly. I increased Handset gain to +6 and lower > Additional > handset gain to -3 to get amplification of +3 what gives higher volume on the > other side but not as much as I would like. That is one problem, the other one > is that now VoIP to VoIP calls in our company are much louder than those to > PSTN and GSM, and if we receive two calls immediately one after another there > is a big difference between PSTN and VoIP calls in the sound volume on our > side > and our users are complaining. > We are > using SIP trunk towards PSTN (so I can’t use txgain and rxgain in > zapata.conf), > for GSM calls we are using PORTech SIPtoGSM GW (but I can’t increase volume on > it anymore because I am getting echo) and I can’t increase volume on Linksys > phones anymore because our internal VoIP calls would then be much too loud. > Does anyone > have same issues even with this new firmware and if so how do you handle > those problems?
Sounds to me like you need to speak with the company providing you a SIP trunk. If the calls between VoIP->VoIP are too loud and the calls to PSTN are too quiet, then likely the provider needs to check their gain settings. -- Cheers, Matt Riddell Managing Director _______________________________________________ http://www.venturevoip.com/news.php (Daily Asterisk News) http://www.venturevoip.com/exchange.php (Full ITSP Solution) http://www.venturevoip.com/st.php (SmoothTorque Predictive Dialer) _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users