tsm

my situation similar
starting in Nov2018, all sip phones in Guangdong can register to hk elastix
and hear the voice but sip phones registered to same elastix  cannot hear their voice!

change port, change public ip of elastix and those sip phones did not work...!
it seem sip connection blocked!
however, voice through iax is ok but quality is not that good as a phone call pass thro 2 elastix servers now.
Ching, any idea, i dont see any solution for your vmess on Google!

tsm

廣東某地現在都ok, 只係講耐d就有好大雜音, 某一方聽唔到. 掛機重撥就ok
99BB 發表於 2019-2-16 11:02

    exactly the same issue for me!
they detect the SIP signal and block you or mess up/delay your packet!!!
reboot the router cause a lot of issues in domain (ddns) update

tsm

回復 3# 角色

sorry for late return
yes
2 elastix box

tsm

Finally I got a solution for this issue. The initial problem came from desktop Siemens DECT IP phone ...
角色 發表於 2019-2-10 15:07

  I try to digest it
   but it is a bit technical for me
    i think i have to read and experiment a lot before I come back to you and report!
    hope i figure out what to do
  a thousand thanks for your advice
   it is very kind of you to share your findings!!!!

tsm

回復 6# 角色

tks but this not work for me
as i wholly use cisco 7912 or cisco 7960 sip phone
and not implement voip under windows

tsm

Instead of using SIP protocol, is there any IAX protocol to bridge two Asterisk boxes?

SIP --> Elas ...
角色 發表於 2019-3-9 17:58

    yes, it is our case use iax to bridge 2 asterisk
    but i am still try to figure out how to use v2ray to build the tunnel

tsm

回復  tsm

Based on my findings, using V2Ray's dokodemo (port forwarding method) should help you in ...
角色 發表於 2019-3-19 13:13

Let me clarify your statement
if the connection between 2 elastix is IAX (using single port forward)
   I can use V2Ray's dokodemo alone to connect 2 elastix and calls

if i use sip phone on 1 site to connect to  elastix on the remote site
   because sip connection require 5606 for handshaking and voice signaling thro port 10000 to 20000
        I have to setup vpn (openvpn) to establish the connection and  
          accommodate multiple port forwarding for the voice call
        in that case it should make reference to your V2ray dokodemo and openvpn thro it

tsm

回復 16# 角色
Thank you for your info and update
finally i see the light
[very depress and annoying in the past 3-4 months everyday getting jam for inhouse internal calls]

i will try to buy raspberry pi and see if I can ok. I agree it may be the most easy way without alternating a lot on existing network
[I am afraid to alter the router (shibby tomato on rt-n16) ]
I hope i can return with good news.

and there are so many articles here from u I have to spend time to digest and trial and error.
Tks again