I just installed 10 SPA525G’s using 802.11 wireless network using the UC540W and AP541. One of the phones is experience one way choppy calls. The wireless signal is great and is next to a phone that is not having an issue. It seems that the calling or called party can always hear fine but the they are not able to hear clearly.
Found this post and wanted to see if there was another firmware or a way to debug the phone. The current code is 540-8.0.2 w/ SPA525 7.4.3.
The voice quality issues are persisting with this one phone after disabling the UC540W VoWLAN and upgrading the firmware. It is not happening all the time but frequently. Another phone on the desk next to the one having the issues is working without any issues.
What methods are available for troubleshooting the voice quality issues of this phone remotely?
After speaking with the customer yesterday, it was happening on multiple phones. I asked them to call the AA and everything sounded ok. We are using SIP Skype Trunking. They have 5Mbps of internet bw. They are upgrading to 10Mbps and have asked them to have the cable company run a test on the line to ensure it is functioning properly. Not all of the external calls have bad quality.
The root of the issue was having the VoWLAN enabled on both the 541 and 540W.
Configure Multicast Paging on the Cisco IP Phone 7800 Series or 8800 Series Multiplatform Phone
The Cisco IP Phone 7800 and 8800 Series Multiplatform Phones provide voice communication over an Internet Protocol (IP) network...
Add Call Park on a Cisco 7800 or 8800 Series Multiplatform Phone Key Expansion Module
Call park allows the user of the phone to put an incoming call on hold so that the call can be retrieved on another phone. A call is park...