RAD Data comm 146 - Manual (Page 10)

155
RAD Data Communications 2006 Catalog
M O D E M E L I M I N A T O R S 12
M
INIA
TUR
E FIBER OPTIC M
ODE
M
S
/ M
ODE
M ELI
M
INA
T
O
R
S
MME, MME/V.35
Replaces Two Sync Modems
of 100 m (330 ft) on each side. MME
operates at selectable data rates up to 19.2
kbps. MME/V.35 operates at 56/64 kbps,
replacing high speed modems.
The MME and MME/V.35 generate the
receive and transmit clocks internally for the
two synchronous DTEs as well as the control
signals necessary to emulate half or full
duplex operation.
The delay between Request to Send and
Clear to Send can be independently set (on
the MME, on port 0 or 6.6, or 53 msec; and
on the MME/V.35, on port 0 or 7, or
64 msec). Carrier Detect signal can be set
to constantly ON, or used as a DTE-to-DTE
handshaking signal where RTS on one port
is converted to DCD on the other port.
Three models are available:
• MME requires no external power supply,
drawing low power from the data and
control signals. Physical connection
between the MME and the DTEs is via
25-pin D-type connectors, either male
or female.
• MME/V.35 requires no external power
supply, drawing low power from the V.35
control signals.
• MME/V.35P has a jack for connection to
an external wall-mounted power supply of
9.12 VDC/200 mA. The MME/V.35P is used
in applications where the DTEs do not
provide the control signals necessary to
power the MME/V.35.
Physical connection between the MME/V.35
and the DTEs is via two 34-pin V.35
connectors, each on a 30 cm (1 ft) cable.
100 m
330 ft
100 m
330 ft
IBM 37X5 IBM 3174
MME up to 19.2 kbps
MME/V.35 56/64 kbps
Visit www.rad.com for latest product updates
• Data rates
MME: selectable up to 19.2 kbps
MME/V.35: 56/64 kbps
• Interfaces
MME: RS-232/V.24
MME/V.35: V.35
• Range of 100m (330 ft) on each side
• Selectable RTS-to-CTS delay
• Carrier-controlled or constantly ON
The MME and MME/V.35 miniature modem eliminators
replace two synchronous modems, permitting direct
DTE-to-DTE connection. They have a maximum range
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