Panasonic KX-NS1000 Programming Manual page 693

12.1.4 PBX Configuration—[4-1-4] Extension—Wired Extension—Flexible Button
Ext No. of Mailbox (for Two-way Transfer)
Specifies the number of the extension whose mailbox will be used to record conversations using One-touch
Two-way Transfer. (For example, a secretary can record a conversation into the mailbox of a boss.) If the cell
is left empty, the extension user must specify the number of an extension each time.
Value Range
Max. 5 digits (consisting of 0–9)
Maintenance Console Location
12.1.4 PBX Configuration—[4-1-4] Extension—Wired Extension—Flexible Button
Feature Guide References
3.1.1 Unified Messaging System Overview
PC Programming Manual 693