We are experieincing a tunneling effect on the sound quality of 525G to 525G phone calls. The tunneling impact is significantly reduced when the conversation is between an outside line caller and 525G. Back to the tunneling sound quality between 525G and 525G on same UC520 LAN - switches are ESW 24 port PoE.
The calls between 525G sounds like the conversation is occurring in a tunnel. The tunnel effect is mitigated when the volume is maximized on the 525G phone, but still very noticeable. The 525G phone user also notices the "call in a tunnel" impact when talking with a 79xx series phone user. The 79xx phone user does not notice the "call in a tunnel" impact.
Yes, I understand this load is not in the official 7.0.3 load, but it was necessary to avoid the speakerphone feeedback issue experienced on prior 525g loads. Is this something Cisco is aware? Is this a bug or simply the way it is?
Thanks in advance.
I have just been notified by the SBSC support team that gain levels can be adjusted on the phone GUI in version 7-4-6 firmware. I will test and let you know.