Nortel M3900 Series Description, Installation And Operation page 41

Table 10
M3900 Series Meridian Digital Telephone accessory compatibility
Accessory MCA ATA
MCA No No
No No
ATA
DTA No No
USB No No
Yes Yes
CTIA
DBA Yes Yes
KBA Yes Yes
Yes Yes
EXT.ATR*
HD SET Yes Yes
EXT.ATR Yes Yes
RCDR Yes Yes
Note 1: Yes = compatible accessories. No = non-compatible accessories.
Note 2: EXT. ATR** = Cartridge External Alerter plugs into ACM.
Note 3: EXT ATR* = External Alerter plugs into Headset Jack.
You cannot use two accessories that require the same port type at the same
time. For example, you cannot use two accessories that require a serial port
connection at the same time.
The shape and size of the plug in accessory cartridge prevents the user from
accidentally connecting incompatible accessories. To check the compatibility
of accessories refer to Table 10 which shows the optional accessories and
their compatibility.
Make sure you refer to the compatibility chart before you purchase your
optional hardware accessories.
DTA USB CTIA
No No Yes
No No Yes
No No Yes
No No No
Yes No No
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
M3900 Series Telephones Description, Installation and Administration
Headset Port
DBA KBA
EXT.ART*
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
No No Yes
No Yes Yes
Yes Yes No
Yes Yes No
Yes Yes Yes
Yes Yes No
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Installation
Headset Port
HD/S EXT. ART**
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
No Yes
No Yes
Yes No
Yes Yes
RCDR
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No