Handsets not ringing for incoming calls

[belias]

Hi,

Sorry, perhaps I wasn't clear in my earlier post. When I directly upgrade the firmware, it WILL NOT LOAD unless I do a factory reset first. Then, after I load the auto-provisioning server address, the firmware goes back to 25.40.193.2.

To answer your questions:

1. 3 handsets works PERFECTLY. I have tested this 100+ times and there are no missed incoming calls; all features works as expected.
2. I am actually not registering 1 account in all 4 handsets. I have 4 separate SIP accounts; each handset is registered to one SIP account. The VoIP provider has a "call group" that rings all 4 accounts at the same time. [[Note: For testing purposes, I have tried configuring 1 SIP account registered to all 4 handsets and this produces exactly the same issue.]]
3. When all 4 handsets are registered, about 80% of the time one (or more) handsets "misses" an incoming call then shows "Searching for Base" or "Synchronizing, please wait".

--

1. Yes - it is not account dependent. It is number of handsets dependent.
2. I will work on this tomorrow. However, I'm not sure I can test with the latest base firmware (see above).

Thank you.