Hi,
I have a brand new Cisco 8861 (3PCC) phone; set up and functions all ok. I have a problem with the handset - when it is being used there is a background static/constant hissing noise. This is what I know about the issue:
- It only occurs when using the handset; when on speaker phone I cannot hear it.
- If you press the mute button while on a call it stops.
- When using my iPhone (via Bluetooth) I don't get the same issue when using the same handset, it appears to be just for SIP calls.
- If I touch the handset cord, it makes the static/hissing worse.
- I have moved the phone around the office to a completely different environment (in case this was an issue to where the phone was placed) - this didn't fix the issue.
- I have not tried a headset to see if this also suffers the same problem.
Set Up:
- Cisco 8861 phone, powered by PoE (TP-Link PoE switch - TL-SG1008P)
Any help would be appreciated as the noise is notably really annoying.
