No audio during the calls from SoftPhone A -> to -> SoftPhone B

[tharangakothalawala]

I am running a container out of this image with the following port config.

Host Machine IP : 192.168.235.100 Docker Container IP : 172.22.0.2

version: '2.3'
services:
    freeswitch:
        build:
            context: .
            network: host
        image: bettervoice/freeswitch-container:1.6.16
        privileged: true
        restart: always
        ports:
            - "5060:5060/tcp"
            - "5060:5060/udp"
            - "5066:5066/tcp"
            - "5070:5070/udp"
            - "5080:5080/tcp"
            - "5080:5080/udp"
            - "8021:8021/tcp"
            - "7443:7443/tcp"
            - "16384-16394:16384-16394/udp"
        volumes:
            - ./conf:/usr/local/freeswitch/conf

networks:
  default:

And I have connected two(2) SoftPhones into the container and I can place calls from one to another. However there is no audio at all.

I have changed the vars.xml for to put my host machine IP, switch.conf.xml for rtp port ranges, sip_profiles/{internal,external}.xml for ext-{rtp,sip}-ip to use $${external_rtp_ip}. Basically the same changes that you see in the question here : https://github.com/BetterVoice/freeswitch-container/issues/9

freeswitch@localhost> sofia status profile external
=================================================================================================
Name                external
Domain Name         N/A
Auto-NAT            false
DBName              sofia_reg_external
Pres Hosts
Dialplan            XML
Context             public
Challenge Realm     auto_to
RTP-IP              172.22.0.2
Ext-RTP-IP          192.168.235.100
SIP-IP              172.22.0.2
Ext-SIP-IP          192.168.235.100
URL                 sip:mod_sofia@192.168.235.100:5080
BIND-URL            sip:mod_sofia@192.168.235.100:5080;maddr=172.22.0.2;transport=udp,tcp
HOLD-MUSIC          local_stream://moh
OUTBOUND-PROXY      N/A
CODECS IN           OPUS,G722,PCMU,PCMA,VP8
CODECS OUT          OPUS,G722,PCMU,PCMA,VP8
TEL-EVENT           101
DTMF-MODE           rfc2833
CNG                 13
SESSION-TO          0
MAX-DIALOG          0
NOMEDIA             false
LATE-NEG            true
PROXY-MEDIA         false
ZRTP-PASSTHRU       true
AGGRESSIVENAT       false
CALLS-IN            0
FAILED-CALLS-IN     0
CALLS-OUT           0
FAILED-CALLS-OUT    0
REGISTRATIONS       0

You can see that my two(2) softphones are registered into the internal profile as it says REGISTRATIONS 2

freeswitch@localhost> sofia status profile internal
=================================================================================================
Name                internal
Domain Name         N/A
Auto-NAT            false
DBName              sofia_reg_internal
Pres Hosts          172.22.0.2,192.168.235.100
Dialplan            XML
Context             public
Challenge Realm     auto_from
RTP-IP              172.22.0.2
Ext-RTP-IP          192.168.235.100
SIP-IP              172.22.0.2
Ext-SIP-IP          192.168.235.100
URL                 sip:mod_sofia@192.168.235.100:5060
BIND-URL            sip:mod_sofia@192.168.235.100:5060;maddr=172.22.0.2;transport=udp,tcp
WS-BIND-URL         sip:mod_sofia@172.22.0.2:5066;transport=ws
WSS-BIND-URL        sips:mod_sofia@172.22.0.2:7443;transport=wss
HOLD-MUSIC          local_stream://moh
OUTBOUND-PROXY      N/A
CODECS IN           OPUS,G722,PCMU,PCMA,VP8
CODECS OUT          OPUS,G722,PCMU,PCMA,VP8
TEL-EVENT           101
DTMF-MODE           rfc2833
CNG                 13
SESSION-TO          0
MAX-DIALOG          0
NOMEDIA             false
LATE-NEG            true
PROXY-MEDIA         false
ZRTP-PASSTHRU       true
AGGRESSIVENAT       false
CALLS-IN            2
FAILED-CALLS-IN     0
CALLS-OUT           1
FAILED-CALLS-OUT    0
REGISTRATIONS       2

I would really appreciate some help here.

[wimh]

Are your softphones on the same lan or are they behind a firewall?

Here are some things you can try to diagnose what is working and what not;

• on both phones call 9197 (milliwatt test tone) to check if the audio from freeswitch to your phone is working on outbound calls (from your phone to freeswitch).
• now call 9196 (echo test) to check if audio from your phone to freeswitch is working too.
• Use fs_cli to test the same for inbound calls. For example enter originate user/1000 9196 to connect ext. 1000 with the echo test.

You might also use tools like wireshark to check which rtp address and port is really used.

[tharangakothalawala]

Thanks for the quick response @wimh

Yes the softphones are on the same LAN / subnet.

When I called 9195 I was not able to hear any audio. Also during this echo test, I couldn't see any RTP stream in wireshark.