44-Series Enhanced Phone Features; Figure C-4.Handset Guide Insertion For Wall Mounting, Key Telephone - Panasonic DBS-2.3-400 Programming Manual

Section 400-Programming
8. Slide the handset guide out, rotate 180° so that the holding clip is exposed, and reinsert.

Figure C-4.Handset guide insertion for wall mounting, key telephone

44-Series Enhanced Phone Features

Note: The enhanced features introduced with these phones are supported by CPC-EX
Version 1.0, CPC-AII/B Version 8.0, and CPC-S/M Version 2.0. You can also
use the 44-Series phones with previous DBS versions, but the enhanced
features won't be supported.
DBS-2.3/9.2-400 DBS Manual - Revised April 2000
Appendix C. EX 1.0 Feature Update
Page C-7