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 : #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:[email protected]:5080
BIND-URL         	sip:[email protected]: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:[email protected]:5060
BIND-URL         	sip:[email protected]:5060;maddr=172.22.0.2;transport=udp,tcp
WS-BIND-URL     	sip:[email protected]:5066;transport=ws
WSS-BIND-URL     	sips:[email protected]: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.