Full Duplex Handsfree Accessory - Nortel Meridian M3900 Reference Manual

72 Hardware options

Full Duplex Handsfree Accessory

The Full Duplex Handsfree Accessory (simultaneous two-way
conversation) is a cartilage accessory that provides full duplex
handsfree capability for the M3904 Release 3 (NTMN34GA or later)
telephone set. You insert the cartridge into the M3904's ACM.
The FDHF functionality requires the following hardware:
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555-4001-136 Standard 05.06 May 2002
M3904 Release 3 telephone set (NTMN34GA or later).
Note: NTMN34TA is the M3904 Release 3 icon set that supports
FDHF.
Full Duplex Handsfree cartridge (NTMN72AA or later)
Accessory Connection Module (NTMN71AA)
110V wall transformer to power the FDHF cartridge (NTMN80AA)