Multitech MT5600DSVD2, Руководство пользователя

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3 Features
23
Front Panel
Figure 3-2. Front panel
The MultiModemDSVD has ten LED indicators on the front panel that indicate
status, configuration, and activity:
TD Transmit Data.
The TD LED flashes 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 flashes when the modem is receiving data from an-
other 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 sig-
nal from another modem. It is on when the modem is communicating with the
other modem and off when the link is broken.
56
56K Mode (56,000–28,000 bps). The 56 LED lights whenever the modem con-
nects to an ISP server in K56flex or V.90 mode. The actual connection speed
depends on server capabilities and line conditions.
33
V.34 Mode (33,600–16,800 bps). The 33 LED lights whenever the modem con-
nects in V.34 mode.
14 V.32bis Mode (14,400 bps–).
The 14 LED lights whenever the modem connects
in V.32bis mode.
Note: Although the modem can connect at lower than V.32bis speeds, no speed
indicator lights during the connection.
OH Off-Hook. The OH LED lights when the modem is off-hook, which occurs
when the modem is dialing, online, or answering a call. The LED flashes when
the modem pulse-dials.
TR Terminal Ready. The TR LED lights when a communication program initializes
the modem. It means the modem is ready for an outgoing or incoming call. It
goes off when the datacomm program disconnects the COM port. When it goes
off, a connected modem will disconnect. The state of the TR LED matches that
of the DTR circuit on pin 20 of the RS-232C/V.24 interface.
EC
Error Correction (V.42). The EC LED lights continuously when the modem is in
V.42 error correction mode, and blinks when compression is activated.
FX Fax. The FX LED lights when the modem is in fax mode.