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http://forums.asterisk.org/viewtopic.php?t=77777
Apr 11, 2011 · I made the suggested changes, but still have issues. I thought specifying "transport=tcp" in the peer definition section would make Asterisk use TCP. Despite the changes specified, SIP still uses UDP (verified with the Wireshark pcap tool). I have noticed, however that Asterisk is in fact listening for tcp traffic on port 5060.
https://support.digium.com/community/s/article/How-to-use-SIP-over-TCP
Apr 29, 2014 · How to use SIP over TCP. SIP normally runs over UDP but it is possible to run it over TCP in certain versions of Asterisk. Only Asterisk versions 1.8 and above support SIP over TCP. Enabled TCP on the general section of sip configuration file (/etc/asterisk/sip.conf) [general]... tcpenable=yes tcpbindaddr=0.0.0.0...
https://community.freepbx.org/t/sip-over-tcp/30525
I have been using SIP over UCP. I just installed a Pantech modem on my router, and it or Verizon appear unable to support UCP. I tried using TCP on my wired connection, and the SIP phones are unable to register. I unblocked the ports on my router. Is there anything I need to do on the FreePBX / Asterisk server to enable SIP traffic over TCP?
https://asterisksiptrunking.us/support/
In your Asterisk deployment you will want to secure your PBX in the file /etc/sysconfig/iptables. We've provided a sample introductory iptables file below: ... -A INPUT -p tcp -m tcp -j REJECT --reject-with tcp-reset ... You can have as many SIP Trunks as you have PBXs to support in your account. Usage costs do apply though, please note.
https://wiki.asterisk.org/wiki/display/AST/SIP+TLS+Transport
Jan 14, 2014 · Asterisk SIP/TLS Transport. When using TLS the client will typically check the validity of the certificate chain. So that means you either need a certificate that is signed by one of the larger CAs, or if you use a self signed certificate you must install a copy of your CA certificate on the client.
https://community.cisco.com/t5/unified-communications/support-sip-cisco-ip-phone/td-p/3528937
Hi, The Cisco IP Phone 7911G/ 7942G / 7965G / 9951 / 9971 support SIP protocol. I can signaling phones with Asterisk solution???....What considerations should I have for the licensing of the Cisco IP Phone?? The price is only IP Phone???? Please, I need a confirmation.. Greeting
https://wiki.asterisk.org/wiki/display/AST/IPv6+Support
Apr 19, 2017 · IPv6 support may be spotty before Asterisk 12. For sufficient IPv6 support it is recommended that you upgrade to Asterisk 13 or greater. Configuration. Fortunately, the configuration is easy and most things will simply work. For channel technologies such as chan_pjsip, chan_sip or chan_iax2 the IPv6 support must be configured in the channel's ...
https://github.com/asterisk/asterisk/blob/master/configs/samples/sip.conf.sample
Dec 22, 2017 · Asterisk checks the SIP From: address username and matches against; names of devices with type=user ... Note that the TCP and TLS support for chan_sip is currently considered; experimental. Since it is new, all of the related configuration options are ... chan_sip support two major formats for notifications: dialog-info and SIMPLE;; You will ...
https://www.asterisk.org/
Asterisk is the #1 open source communications toolkit. Asterisk powers IP PBX systems, VoIP gateways, conference servers, and is used by SMBs, enterprises, call centers, carriers and governments worldwide.
https://stackoverflow.com/questions/15644726/with-sip-when-to-use-tcp-not-udp
SIP over TCP has a significant advantage over UDP for mobile devices. The reason is due to the use of NAT, and how NAT table entries in a wireless router or a cell providers' router are generally timed out much quicker for UDP vs TCP.
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