<p dir="ltr">We use standard sip ports all day long, and have had no issues with employee phones on the verzion network.</p>
<div class="gmail_quote">On Jul 18, 2014 12:03 PM, "Eric Wieling" <<a href="mailto:EWieling@nyigc.com">EWieling@nyigc.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:10.5pt;font-family:Consolas;color:#1f497d">Depends on the carrier. Verizon Wireless appears to activly block SIP. G729 codec is needed on 3G and is a good idea on 4G. I use TLS and SRTP to work around carrier stupidity. I also use a non-standard port for TLS. It mostly works much of the time. Don’t get BRIA, every time your registration is dropped it will popup a notification.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:asterisk-users-bounces@lists.digium.com" target="_blank">asterisk-users-bounces@lists.digium.com</a> [mailto:<a href="mailto:asterisk-users-bounces@lists.digium.com" target="_blank">asterisk-users-bounces@lists.digium.com</a>] <b>On Behalf Of </b>Tech Dude<br>
<b>Sent:</b> Friday, July 18, 2014 1:00 PM<br><b>To:</b> <a href="mailto:asterisk-users@lists.digium.com" target="_blank">asterisk-users@lists.digium.com</a><br><b>Subject:</b> [asterisk-users] VoIP over 3G/4G Data<u></u><u></u></span></p>
</div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">What are the recommended settings to successfully implement VoIP over 3G/4G data connection. Assume we are talking about using Polycom phones, and the 3G/4G data connection comes from a Cradlepoint router that is plugged in with AC power and has high gain antennas. The device will be stationary, so we will not have to worry about tower handoff’s breaking the connection. This will be for fixed wireless.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> <u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">I have read to use G.729 codec, and TCP for signaling to bypass firewalls. Besides that, what other settings are recommended? Changes in MTU? Changes in voice payload ms? Is there a better codec to use? Header compression? <u></u><u></u></span></p>
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