Thanks for the feedback Stephan.
No, this is a single router with both server and phones on the same network/subnet. Somehow the nat=yes in the sip_nat.conf effected all the internal calls as well. And since it effected all the internal calls, hence, the ZAP also had one way audio which again related to the confusion of nat=yes within the network. I think nat=yes applied globally in this specific environment. The router is pfsense and I am also suspecting it behaves differently from other routers I worked with Issue was solved by remove nat=yes from the mentioned file. Regards, Bruce > From: [email protected] > Date: Thu, 5 Aug 2010 11:00:13 -0400 > CC: [email protected] > To: [email protected] > Subject: Re: [on-asterisk] One-Way Audio on both SIP / Zaptel but not on IAX > > Bruce, > > I'm surprise you get one way audio on Zaptel calls. > > Are you running double NAT on your network (2 routers)? SIP will not function > right with double NAT or 2 routers. > > Are you using a DSL modem with the built-in router by any chance? If you do, > you are probably using 2 routers on your network and SIP calls may get one > way audio. > > Stephan Monette > Unlimitel Inc. > > Tel.: 1-877-464-6638 > Fax: (613) 482-1077 > > > > > > On 2010-08-05, at 10:37 AM, Bruce N wrote: > > > > > Hi Everyone, > > Could the internal firewall be the cause of this?Anyone can share their > > pfsense LAN firewall settings? > > This is a system that has been working and stopped working without any > > changes. > > Thanks > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] >
