Admin Guide - Mizu Voip

Set the udptunnelsamesock congig option to at least 1. (udptunnelsamesock = 0; //0=no,1=if received so, 2=yes). This will tunnel only encrypted sessions soit is safe to use.Increase the “udpbuffsize” configuration optionTunneling between two serversSetup the sip servers and traffic senders with forced encryption and desired protocolSet the “usehttpclient“ global config option to “true”.Set tb_users.protocol to 4 if TCP tunneling is needed and set the port to 443 (default TCP server port)Tunneling between a servers and mtunnelsrvJust set the tunnel client to connect to the server.You might also adjust the following tcp tunneling related configuration options:-tcptunnelallowsendtosameip; //0=no,1=without streamid,2=yes-tcptunnelmultipleep; //when set to true than we are searching for rtp ssrc (more than one ep can send in one tcp stream. for example when we have amtunnelclientsrv with multiple gateways)-userptepptrsig; //each tcp rtp packet is marked when this is set to true5. FAQ5.1. How to make a H323 call directly to a GW (without the gatekeeper)set the signalport to 1720 in the gateway inifilelaunch ohphone g729: 999simid#telnumber5.2. Sometimes the voice channel is breaking down. How can I improve the voice quality?Set up to active silencedetection (silencedetection=1)Increase the jitter buffer (minjitter, maxjitter)Use a low bandwidth codec (onlyg72x=1)5.3. Using NetmeetingMICROSOFT NETMEETING (H.323) tcp port 522, 389, 1503, 1720 and 1731 plus two secondary dynamically negotiated udp ports in the range 1024-65535 for the Hstreaming protocol transmission of audio and video. For transmission of audio and video you only have to enable outgoing for these ports. Unfortunately to allow incomaudio and video you need to open up the entire 1024-65536 range as well as tcp 1503, 1720, 1731. Due to the complexity of the H.323 protocol which pre-dates theintroduction of network address translation, unless you have a firewall or proxy that specially supports the H.323 protocol at the application level, and thus supports thevirtual opening of dynamic incoming udp ports, you have to open them all up. See Microsoft's Knowledge Base "How to Establish NetMeeting Connections Through aFirewall" Q158623.