Instruction manual
Reassigning MDW 9031 Line Buttons
5-2
Installation, SPM, Maintenance, and Troubleshooting Supplement
Reassigning MDW 9031 Line 
Buttons
5
You must reassign the factory-set line buttons when you connect an MDW 9031 
telephone to an 016 ETR module. The procedure varies according to the 
operating mode of the system: Hybrid/PBX, Key, or Behind Switch.
Hybrid/PBX Mode 5
In Hybrid/PBX mode, the system assigns a System Access (SA) Ring button, 
an SA Voice button and an SA Originate Only button to the MDW 9031 
telephone based on the factory-set button assignments for the MLS-12D 
telephone (see Figure 5-1).
Figure 5-1.  MDW 9031 Factory-Set Button Assignments in Hybrid/PBX 
Mode
SA
OO
5
Blank
6
Blank
7
Blank
8
SA
Voice
1
Blank
2
Blank
3
Blank
4
SA
Ring
A
Blank
B
Blank
C
Blank
D










