The number of calls from the same Caller ID appears next to the received time. Once you view the new message, the number will disappear.
Viewing the Caller ID List
The Caller ID list stores information for incoming calls - even unanswered calls. You can store up to 100 Caller ID messages and phonebook locations (including Speed Dials) for each handset and the base. You can view the Caller ID list through the handset and base during a call or when the phone is in standby mode.
1) Press cid (or cid/exit on the base). The summary screen appears. The screen
shows the number of new messages and total messages.
2) To view the Caller ID messages in historical order (newest to oldest or from oldest to
newest), use, 
/volume down to scroll through the messages from the latest to the earliest, or 
/volume up to scroll back through the messages.
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