• 1.3.6.1.4.1.2011.5.25.1.7.1.5
• Access readwrite
• Type Unknown
• Default 15

The maximum retain time of entries that the hwVoCallHistoryGenericTable, hwVoCallHistoryVoIPTable and hwVoCallHistoryPSTNTable may contain. The value 0 means that any history entry will not be saved. if these table are full, the oldest history entry will be deleted and the new one will be added.