2
Specifications
Modem Rack
Capacity —
Holds up to 16
modems
Connectors —
One 3-prong
grounded receptacle for AC
power cord; (16) Female
DB25 data ports; (16) RJ-11
jacks
Size —
19"W x 7"H x 14.75"D
(48 x 18 x 37.5 cm)
Weight —
Rack only: 12 lb. (5.4 kg);
Rack and one power
supply: 21 lb. (9.66 kg)
Modem Card
Standards —
ITU: V.34+; Bell:
103, 212A
Data Rates —
33.6K, 31.2K,
28.8K, 26.4K, 24K, 21.6K,
19.2K, 16.8K, 14.4K, 12K,
9.6K, 4.8K, 2.4K, 1.2K, and
up to 300 bps
Data Compression —
V.42 bis
Fax Speeds —
14.4, 9.6,
4.8 kbps
Fax Compatibility —
V.17,
Group III
Speed Conversion —
Serial-
port data rates adjustable to
300 bps, 1.2, 2.4, 4.8, 9.6,
19.2, 38.4, 57.6, 115.2 kbps
Flow Control Options —
XON/XOFF, Hardware
RTS/CTS, ENQ/ACK,
Unix-to-Unix Copy Protocol
(UUCP) Spoofing
Integrity —
V.42 LAPM and
MNP Classes 3 and 4 error
correction
Operation —
MD1600C: Full-duplex
over 2- or 4-wire leased
lines or dial-up lines;
MD1601C: Full-duplex
over 2-wire leased lines
or dial-up lines
Protocol —
Async or sync
Compression —
MNP Class 5
(2-to-1) and V.42bis (4-to-1)
Diagnostics —
Power-On Self-
Test, Local Analog Loop,
Local Digital Loop, Remote
Digital Loop
Indicators —
RCV, XMT, CD,
OH, DTR, RI, various data
rates, OOS/ERR
Controls —
Toggle switch for
out of service (OOS);
onboard DIP switches for
various modem options
Power Requirements —
115 VAC, 60 Hz, 0.3 A
Power Consumption —
Approximately 6 W
Temperature Tolerance —
Operating: 32 to 120° F
(0 to 50° C)
Size —
5.5"W x 10.5"H
(14 x 26.7 cm)
Weight —
1.5 lb. (0.68 kg)
Power Supply
Input —
90 to 245 VAC
Output —
5 VDC and ±15
VDC regulated
Indicators —
(1) LED indicates
all outputs are good
Switches —
(1) Power On/Off
switch per power supply
Fan —
DC fan for cool
operation
Operating Temperature —
32 to 120° F (0 to 50° C)
Power —
70 W full load
Size —
7"H x 1.9"W x 12"D
(17.8 x 4.8 x 30.5 cm)
Weight —
1 lb., 13 oz. (0.8 kg)
Technically Speaking
T
he rack modems are
generally used in a
central-site computer
environment, connected to a
mini- or mainframe computer.
In these installations, the main
purpose of the modem is to
automatically answer
incoming calls from remote
users.
After seating the modem
card into one of the 16 slots on
the rack, you simply connect
an RS-232C cable to the DB25
female connector on the
backplane of the rack. You can
also connect your phone line
directly to an RJ-11 connector
on the rack’s backplane.
The card also features:
• ITU-T V.42 LAP-M and
MNP Classes 3 and 4 error
correction;
• Automatic disabling of
compression when
transferring files that are
already compressed;
• Serial-port data rates
adjustable to 115.2 kbps;
• Autodial, redial, pulse
(rotary), and Touch-Tone
dial;
• Compatibility with the
standard AT command set
used by most
communication programs.
• On-screen help menus;
• Nonvolatile memory for
storing customized modem
parameters and 10 phone
numbers;
• Ability to respond to EIA
TR.29 Class 2 fax
commands;
• Support for Unix
®
to Unix
UUCP Spoofing;
• Support for IBM
®
AS/400
™
and System 3x
environments.
You also get an array of
circuit board controls via the
modem card’s 16 DIP
switches. You can use the
switches to configure options
or set default values in the
command mode. For instance,
you can position the switches
to echo modem responses, set
the modem to operate at the
highest efficiency level, select
transmit clock source, and
enable and disable various
modes.
Or you can simply rely on
the factory-default settings.
They’re based on the
assumption that you’ll use the
modem card to dial up a
remote installation where a
call is automatically answered.
Most communications-
software packages have
installation procedures of their
own, and your package may
call for certain modem DIP-
switch settings.
Ordering Information
This information will help you place your order quickly.
PRODUCT NAME
ORDER CODE
Modem Rack with Power Supply................................RM1600
Redundant Power Supply (Optional)...........................PS1600
V.34 Rackmount Modem Card for 2-/4-Wire.........MD1600C
V.32 Rackmount Modem Card for 2-Wire Only.....MD1601C
ACCESSORY
ORDER CODE
RS-232 Cable, 10-ft. (3-m) ...................................ECM25C-0010
(Other lengths available. Call us!)
• RS-232 Cable.
Additional equipment you may need:
