Hi, so me and my friend each has a obi 110. When I call his obi using the **9 + Obi #, his phone rang but as soon as he picks up, he hears a busy tone. At the same time, on my side, I can hear it too. Although still hearing the busy tone but we can talk using the landlines phone now.
If we do the same thing but now he calls me, we both hear on each side a long tone (something like when you call somebody, they pick up and hang up right away, you will hear a long tone. I believe). Similarly, although still hearing the long tone, we can talk using the landlines now.
Please help
Thanks
