No ring back on follow me calls

Status
Not open for further replies.
D

Doug Mattingly

New Member
Dec 16, 2017
7
0
1
60
I have set up follow-me call routing which includes external cell phone numbers on some extensions. An external caller does not hear any ring back while the phones are ringing when follow-me is enabled. When calling direct to the extension from another extension on the same system, the caller can hear the ring back. Any idea how to fix this?
Thank you in advance.
 
D

Doug Mattingly

New Member
Dec 16, 2017
7
0
1
60
I haven't set up any way to do an external sip trace yet although I'm planning to set up homer. In the meantime, is there something instrinsic in fusionpbx that would help? My research indicated an early media issue as well. Are there any specific settings I should check regarding early media?
 
H

hailthemelody

Member
Dec 9, 2017
53
5
8
Let us know. You could also try tshark (terminal-based wireshark), it's fairly easy to get going with that (apt-get install tshark on Debian family)
 
D

Doug Mattingly

New Member
Dec 16, 2017
7
0
1
60
I realized I can take a packet capture from my router and view on wireshark. I found that the internal calls produce a sip status 180 ringing whereas the external calls produce a sip status 183 session progress. Does this help?
 
c0reM

c0reM

New Member
Jan 19, 2017
12
1
3
74
It's easiest if you post the full SIP trace so we can see the call flow. The best utility for this is sngrep on the server. Google sngrep as you need to add the sources in sources.list then you can do apt update and apt install sngrep.

Run that and post the full trace and somebody can probably tell you more from that.
 
D

Doug Mattingly

New Member
Dec 16, 2017
7
0
1
60
Here is the full trace from the packet capture with public ip addresses redacted. The fusionpbx is behind nat and has private ip 192.168.97.201. The extension 1411 is being called and is routing the call to an external cell phone and another extension on a different network. Everything works except that the caller does not hear ring back during the ringing process.
 

Attachments

  • sip trace external call .txt
    7 KB · Views: 7
K

KonradSC

Active Member
Mar 10, 2017
166
98
28
I'm a little late to the party, but I just ran across the same thing. I inserted this into the dialplan to fix the issue.

Code: 
<action application="set" data="ringback=%(2000,4000,440.0,480.0)" />

You can insert it in the public context under inbound routes and that will cover all domains. Or you can insert it under dialplan manager for each domain that is broken. I put mine under the "variables" step for the particular domain that had the issue. My ring back broke when I enabled Fax Detection.
 
DigitalDaz

DigitalDaz

Administrator
Staff member
Sep 29, 2016
3,044
565
113
One thing I noticed in that trace was UDP was getting fragged, this would likely be happening on the 183 because that would be carrying an SDP. I have definitely had this myself before when the 183 gets fragged and you get no ringback. So reduce the codecs or switch to TCP
 
K

Koketso Mabuse

New Member
Mar 4, 2019
2
0
1
46
Cosmo City, RANDBURG, South Africa
www.tluka.co.za
Hi there, I am a newbie and need a bit of clarity on where to insert that. Tried Advanced, Variable ... could not find where to insert that.

Regards

KonradSC said:
I'm a little late to the party, but I just ran across the same thing. I inserted this into the dialplan to fix the issue.

Code: 
<action application="set" data="ringback=%(2000,4000,440.0,480.0)" />

You can insert it in the public context under inbound routes and that will cover all domains. Or you can insert it under dialplan manager for each domain that is broken. I put mine under the "variables" step for the particular domain that had the issue. My ring back broke when I enabled Fax Detection.
Click to expand...
 
K

KonradSC

Active Member
Mar 10, 2017
166
98
28
Go to Dialplan -> Dialplan Manager.
Edit Variables (order #20)

Tag: action
Type: set
Data: ringback=%(2000,4000,440.0,480.0)
Inline: true
 
S

s2svoip

Member
Dec 9, 2019
259
8
18
44
this is interesting, I had to add this today because I noticed if I enabled follow me with 2 extensions in destination then nether would ring when I called the extension, when I ended the call both ext in the destinations would show a missed call - very odd - why I would need to add this now i've no idea, can anyone explain why this would suddenly be needed ? what does the additional dialplan entry do ?
 
Status
Not open for further replies.
Top Bottom