Anyone experienced a problem where an incoming call is disconnected when answered using the headset button on a 5420 (with a connected AWH-55+ headset)?
We use IP500s at multiple sites with DS8 cards connecting 5410/5420s handsets. Software is 4.1 and 4.2. Systems and handsets/headsets are less than two years old.
At first I thought perhaps just a bouncing 5420 headset key was the culprit (first press answers then a bounce hangs up the call.) However, two very reliable users (one on the 4.1 system and one on the 4.2 system) report multiple occurrences of the problem (and neither is the aggressive-type stabbing the headset button.) And, no other key on the 5420s they use seem to "bounce."
I've asked one user to try answering calls exclusively using the button on the AWH-55+ headset, and it appears calls do not disconnect when answered at the headset.
Additionally, there is some indication the problem can be minimized by not answering the alerting call immediately. That is, one of the users reports that waiting for a ring cycle or two before answering with the headset button on the 5420 seems to reduce the frequency of disconnects.
Incoming calls at these two facilities are via POTS lines connected to analog 4 mezzanine cards. The AWH-55+ headset base stations are configured per the book for connection to the 5420 (telephone configuration dial on the base is set to position 3.) The AWH-55+ headsets otherwise work normally.
This problem is happening too frequently (multiple times daily per user), at two separate locations, to be a fluke.
Any thoughts or suggestions?
Thank you.