3 of 3
8/30/2007
#15750
724-746-5500
blackbox.com
TECH SPECS
DCD —
Constantly ON or controlled by RTS (selectable per port)
Operation —
Emulates point-to-point, half- or full duplex switched or
dedicated line
Ring Indicator —
Constantly ON
RTS/CTS Delay —
ME242A-M: 0 or 6.6 ms (selectable per port);
ME1240A-F, ME900A-M, ME900A-F: 0, 6.6, or 53 ms
(selectable per port)
Speed —
ME242A-M: 7, 14, 28, 56, 112, or 224 kbps (selectable);
ME1240A-F: From internal clock: 1200, 2400, 4800, or
9600 bps; 19.2 or 38.4 kbps (selectable);
From external clock: 38.4 kbps;
ME900A-M, ME900A-F: 1200, 2400, 4800, or 9600 bps; 19.2 kbps
(selectable)
Interface —
RS-232 synchronous
Connectors —
ME242A-M, ME900A-M: (2) DB25 male;
ME1240A-F, ME900A-F: (2) DB25 female
Indicators —
(2) Tri-state LEDs for Receive Data (RD), Request to Send
(RTS), and Data Carrier Detect (DCD)
Power —
From the interface
Size —
1.2"H x 2"W x 5.3"D (3 x 5.1 x 13.5 cm)
Item
Code
High-Speed Sync Modem Eliminator-Nonpowered
224 kbps, DB25 Male
ME242A-M
Synchronous Modem Eliminators-Nonpowered
38.4 kbps
DB25 Female
ME1240A-F
19.2 kbps
DB25 Male
ME900A-M
DB25 Female
ME900A-F
You might also need…
RS-232 Cable, 25-Conductor,
10-ft. (3-m)
ECM25T-0010
(For other RS-232 cable lengths, call our FREE Tech Support.)
Modem eliminators.
Understanding the process of elimination.
If your office environment has sync equipment, and if that
equipment is also used for local data communications, you
should consider replacing those modems with cost-effective
and versatile modem eliminators.
What does a modem eliminator do?
One modem eliminator can connect a local terminal and
computer port in lieu of the pair of modems that they would
normally connect to. Plus, a modem eliminator enables
DCE-to-DTE data and control-signal connections that are
not easily achieved by standard cables or connectors in a
sync environment.
Basically, a modem eliminator simulates a sync data link.
It does this two ways. First, it provides clocking, which is
mandatory for sync devices to communicate. Second, it
provides the handshaking that DCEs do.
Three reasons to use a modem eliminator:
One—
if you have two sync DTEs in the same room or close
to each other, you will need a modem eliminator.
Two—
if you have a network with routers, you just found
the perfect equipment tester.
A modem eliminator can enable in-house bench testing
of routers or existing equipment. There’s no need to place
routers all over your network only to find out they don’t work
once you test the LAN. A modem eliminator tells you what
equipment passes your tests before you install.
Three—
a modem eliminator makes good economic sense.
One does the job of two modems—and it does the job better.
You get a high return on your investment.
Technically Speaking
ME1240A-F
