Multi-Tech Systems MT3334ZDX - Manual (Page 13)

2 - Installation
13
CD
Carrier Detect. This LED lights when a valid carrier signal from another
modem is detected.
33
V.34. This LED is lit when the modem is connected in V.34 mode at
33,600 bps.
14
V.32 bis. This LED is lit when the modem is connected in V.32bis mode.
Note at speeds lower than a V.32 bis connection, the MultiModemZDX
speed LEDs remain unlit.
96
9600bps. This LED is lit when the modem is connected at 9600 bps.
OH
Off Hook. The condition of Off Hook indicates to the central office that the
MultiModemZDX wants the phone line to do something (i.e., dial or
answer a call). This LED is also lit when the MultiModemZDX has
achieved on-line status.