Full Duplex module for 3904 sets

[Mrtelephoneman]

Is there any programming when adding a (NTMN72AA)full duplex handsfree mod and a (NTMN71AA)accessory conn mod to a 3904 set, or is this a quick snap on and plugin fix to get the full duplex feature?

 

[Klowndog]

Full Duplex Handsfree
The Full Duplex Handsfree (FDHF) functionality allows simultaneous
two-way communication duringa handsfree call. For Full Duplex Handsfree
functionality, you require an M3904 Phase III set equipped with an FDHF
cartridge.
The FDHF functionality requires the followingha rdware:
• M3904 Phase III set (NTMN34GA)
Note: NTMN34TA is the M3904 Phase III Icon set.
• Full Duplex Handsfree cartridge (NTMN72AA)

LD 11 – Allow the Handsfree Class of Service.
Prompt Response Description
REQ: NEW
CHG
Add new data.
Change existing data.
TYPE: 3904 M3900 series telephone type.
Full Duplex Handsfree functionality requires an M3904
Phase III set.
...
CLS HFA Handsfree Allowed.
HFD = Handsfree Denied (default).

 

[Klowndog]

I have never used one but its what i found in the NTP.

 

[Mrtelephoneman]

Thanks for the feed back, I'm good to go!

 

[Andras888]

Doesn't the M3904 Phase III set (NTMN34GA) already have the full-duplex speakerphone built-in? I thought that was the difference between the Phase III GA and the earlier M3904 sets.