SIP Phones cannot transfer calls When call is on hold
You are looking for the max-calls-per-button parameter.
On SCCP phones, you can use the max-calls-per-button command to change the number of calls that can be handled by that particular button to values >2. You will need this in order to have an existing call on Hold as well as do a transfer on a second incoming call. Once you press transfer, the line will need to go off-hook for a third call.
So far, this command seems to only have been allowed for the SCCP phones. For SIP, the command is not present so the parameter defaults to a value of 2. Hence, it's working as designed when you are unable to transfer calls when there is already an existing call on hold.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...