Page 102 of 174 Installation
553-3001-216 Standard 5.00 January2002
To install the FDHF cartridge
Toin stall the FDHF cartridge in an M3904 Phase III set, perform the
following steps:
1Checkthe label on the back of your set to make sure that it is an M 3904
PhaseIII set (NTMN34GA). If yo ur set is an NTMN34GA, go to Step 2.
Ifyour set is not an NTMN34GA, it is not FDHF-compatible. Please
contactyour system administrator to obtain the correct set.
2Installthe Accessory Connection Module (ACM). For information on
howto installthe ACM, refer to “Accessory Connection Module
(ACM)” on page 89.
3Insert the FDHF cartridge into one of the ACM ports.
4Plugt he wall transformer into the electrical outlet.
5Disconnectthe telephone line cord from the telephone wall jack. See
Figure19 on page 103.
6Connectthe wall transformer adapter plug into the telephone wall jack.
SeeFigure 19 on page 103.
7Connectthe telephone line cord to the wall transformer adapter jack. See
Figure19 on page 103.
8Verify that the FDHF cartridge is working properly.
TheFDHF cartridge is working properly when the red LED on the FDHF
cartridgeis flashing and when there are 18 segments on the volume bar.