I have small in-house device running on linux platform with bluez libraries.

I have created a sco connection with Jaber Easygo device and everything works as expected. I mean I can play music on my linux machine using aplay and I can successfully hear on jabber. similarly I can record voice from jabber to linux machine using arecord.

Now I want to do testing using remote loopback, so that I send packets from Jabber to Linux machine and receive same packet back into Jabber.

After trying and spending days I couldn't able to crack it, so I am requesting you guys to please give some advice.

Below are the following things I tried.

1) Load kernel module snd-bt-sco 2) Ran btsco -v -r

o/p : successfully created the link and can play or record music . so far so good

Now for remote testing

i) open a terminal and type

o/p : sometimes
ii) In another terminal I use hcidump

iii) In another terminal I record so that packest goes from jabber to Linux box

then I speak something on Jabber and close the above recording

iv) Using Wireshark and filter type "bthci_sco" all I have noticed is Rcvd SCO DATA has data in it ( which is obviously expected) example
But Sent SCO DATA has no data in it example

Can some please guide me what I am doing wrong

Thanks a lot