There are various timeouts associated with VCL reservations. These are in place to keep resources from being tied up unnecessarily when reservations are not being used. Each timeout can be configured on the Site Configuration page and can have values set separately for each affiliation.
See the following fields on the Site Configuration page for a description of what each one means:
Acknowledge Reservation Timeout
Connect To Reservation Timeout
Reconnect To Reservation Timeout
Connected User Check Threshold
In-Use Reservation Check
In-Use Reservation Check (servers)
In-Use Reservation Check (clusters)