3.0 OPERATION
The receive clock of DCE 2 clocks data into buffer A. The transmit clock of
DCE 1 clocks data out of buffer A.
The receive clock of DCE 1 clocks data into buffer B. The transmit clock of
DCE 2 clocks data out of buffer B.
For the X.21 interface, both receive clock and transmit clock of each side
are connected to the X.21 DCE's "Signal Timing".
Note: The buffers introduce transmission delay into the data paths between the
DCEs. The control signals, however, are not buffered and are just wired through,
as shown. This should be considered when using the 3004-ECB in applications
where the data and control signals must have the same delay.
4.0 INSTALLATION
Installation is easy and straightforward. Simply connect each port of the 3004-
ECB to one of the DCEs. There are no jumpers or switches to configure.
DCE 1
DCE 2
INTERNAL CLOCK
BUFFER A
TC
TT
TD
CD
RTS
RC
RD
TD
RC
RD
DSR
DTR
CTS
SG
FG
SG
FG
CD
CTS
DTR
RTS
DSR
TC
J1
J2
TT
BUFFER B
INTERNAL CLOCK
DCE
3004-ECB
DCE
5
6
