I am in the middle of implementing a Singlewire PushToTalk system in a wireless network with Cisco 5508 WLCs and Cisco 7925 phones.
I managed to configure everything and PTT works with the exception that from time to time there is a indication on the listening side and a beep sound, but there is no voice and the listening side doesn't hear anything. There is no logic when it happens and when it doesn't. The problem appears approximatelly 1 of every 15 attempt in one session.
The firware of the phones is the latest 1.3.4 and the PTT software is the latest, too.
If anybody has any idea what can be the reason I will appreciate any advices and hints.