38
MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
The Mini-Modem has ten LED indicators on the front
panel that indicate status, configuration, and activity:
• TD: Transmit Data. The TD LED lights when the
modem is transmitting data to another modem.
The state of the LED matches the TD circuit on
pin 2 of the RS-232C/V.24 interface.
• RD: Receive Data. The RD LED lights when the
modem is receiving data from another modem.
The state of the LED matches that of the RD
circuit on pin 3 of the RS-232C/V.24 interface.
• CD: Carrier Detect. The CD LED lights when
the modem detects a valid carrier signal from
another modem. It is on when the modem is
communicating with the other modem and off
when the link is broken.
• 33: 28,800–33,600 bps. The 33 LED lights by itself
when the modem connects at 28,800 bps, blinks
slowly to indicate 31,200 bps, and blinks fast to
indicate 33,600 bps operation. This LED also
lights or blinks in combination with the 14 LED
to indicate speeds between 16,800 and 26,400 bps
(see the table on
page 41
).