I do have a weird one-way voice problem.
1. I am not using Cisco Voice devices.
2. I am using Polycom Phones and Lync Server.
3. No ACLs or Firewalls in the network setup between the switches.
But, the main problem which i am facing is with the Cisco 3850 and Cisco 3650 Switches which we recently deployed.
So, this is the problem statement : We have a customer-care service center setup and we are using Zeacom for doing the call transfers. So, the problem here is
" when i make a call to the zeacom operator from the polycom phone connected to the 3650 sw, the operator cannot hear my voice. I can hear the operator"
I also did a few test cases today.
Case1: From Polycom Phone (10.5.9.10)
Case2: From Skype Phone on the laptop (10.5.8.50)
Case3: From Zeacom Operator
Case4: From Polycom Phones (172.16.102.76/172.16.101.65) and Skype phone (172.16.32.171)
So, with all these tests, I could finally identify that… the calls between the Polycom phone (10.5.9.50) and the Zeacom Operator are having a one-way voice problem irrespective of direct call or transferred call.
I also spanned the Vlan 509, to other switches and tested and it works fine. I have problem with the new 3650 switches. There is some QoS configuration on some of the switches. I am not good with the QoS, but please let me know if you want to see the configurations of QoS. I would be happy to supply them.
I checked the Wireshark logs - RTP between end-points ( NO visible in both GOOD case and BAD case). In all the cases, the phones just talk to Lync server.
I am sorry for the lengthy question, but i am really frustrated with my problem and if someone could help me with some ideas,. it would greatly help me. Thanks a lot in advance.