SPA9000 FW: 6.1.5
SPA400 FW: 1.1.2.2
SPA921 FW: 5.1.8
All devices are on the same LAN (private lan, only used for VOIP), no firewalls. Not using DHCP, all phone instruments have static IP's assigned (12 instruments). The SPA400 has a single PSTN line connected. Internal calls have no problem with one way audio. Making external calls or receiving external calls, call hear the other person but they don't hear anything from my end.
Have tried changing the "Force media Proxy" - no change
RTP packet size is set to .030
Any suggestions would be appriciated.
