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172001UA
2-2
slaved to this clock.
To connect a X.21 terminal type device (DTE) to an RS-232 Modem type
device (DCE), connect the terminal to J2 and the Modem to J1. Move
SW1 and SW2 to the DTE position, and SW3, SW4 and SW5 to the DCE
position, as shown in Fig.2.
X.21 DTE
X.21 DCE
V.24 DTE
TXD - 2
TXC - 15
RXC - 17
S - 6, 13
T - 2, 9
V.24 DCE
RXD - 3
R - 4, 11
Buffer
RTS - 4 / DTR - 20
C - 3, 10
CTS - 5 / DCD - 8
I - 5, 12
I
Power
T
S
R
J3
C
Factory Test Straps
Must be Installed for Unit To
Operate Correctly
J1 (RS-232) Is a DTE, and
MUST Connect to a
Modem (DCE)
J2 (X.21) Is a DCE, and
MUST Connect
to a Terminal (DTE)
J2
X.21
J1
RS-232
JP3
JP2
JP1
JP4
SW1
X.21 INTERFACE
DCE
DTE
Signal
to
Chassis
Ground
SW2
SW3
JP5
JP6
DTR /RTS
DCD / CTS
SW4
SW5
DCE
DTE
V.24 INTERFACE
Figure 2.
To connect a X.21 Modem type device (DCE) to an RS-232 Modem type
device (DCE), connect the X.21 Modem to J2 and the V.24 Modem to J1.
Move SW1, SW2, SW3, SW4 and SW5 to the DTE position, as shown in
Fig.3.
X.21 DCE
X.21 DTE
V.24 DTE
TXD - 2
RXD - 3
RXC - 17
XTXC - 24
S - 6, 13
T - 2, 9
R - 4, 11
V.24 DCE
Buffer
RTS - 4 / DTR - 20
C - 3, 10
CTS - 5 / DCD - 8
I - 5, 12