B-25
Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide
78-15827-06B0
Appendix B Cable Specifications
Smart Serial Connection Signals and Pinouts
EIA/TIA-232 Smart Serial Cable Assembly
Table B-17
lists the DTE pinout and
Table B-18
lists the DCE pinout for the EIA/TIA-232 Smart Serial
cable. Arrows indicate signal direction: —> means DTE to DCE and <— means DCE to DTE.
Table B-17 EIA/TIA-232 DTE Smart Serial Cable Pinout
26-Pin
Signal Name
Note
Direction
DB-25
Pin
Signal Name
J1-23
J1-24
MODE_0
MODE_DCE
Local connections
Drain
wire
Shield
—
J2-01
Shield_GND
J1-05
J1-18
I_RXD/TXD+
GND+
Twisted pair no. 9
<—
—
J2-03
RXD
GND
J1-01
J1-14
O_TXD/RXD+
GND+
Twisted pair no. 5
—>
—
J2-02
TXD
GND
J1-11
J1-12
I_CTS/RTS+
I_DSR/DTR+
Twisted pair no. 2
<—
<—
J2-05
J2-06
CTS
DSR
J1-08
J1-07
O_RTS/CTS
O_DTR/DSR+
Twisted pair no. 4
—>
—>
J2-04
J2-20
RTS
DTR
J1-06
J1-19
B_DCD/DCD+
GND+
Twisted pair no. 1
<—
—
J2-08
J2-07
DCD
GND
J1-03
J1-16
B_TXC/TXC+
GND+
Twisted pair no. 7
<—
—
J2-15
TXC
GND
J1-02
J1-15
O_TXCE/RXC
+
GND+
Twisted pair no. 6
—>
—
J2-24
TXCE
GND
J1-13
J1-26
B_LL/LL+
GND+
Twisted pair no. 3
—>
—
J2-18
LTST
GND
J1-04
J1-17
I_RXC/TXCE
+
GND+
Twisted pair no. 8
<—
–
J2-17
RXC
GND
Table B-18 EIA/TIA-232 DCE Smart Serial Cable Pinout
26-Pin
Signal Name
Note
Direction
DB-25
Pin
Signal Name
J1-23
MODE_0
Local connections
Drain
wire
Shield
—
J2-01
Shield_GND
J1-05
J1-18
I_RXD/TXD+
GND+
Twisted pair no. 5
<—
—
J2-02
TXD
GND
J1-01
J1-14
O_TXD/RXD+
GND+
Twisted pair no. 9
—>
—
J2-03
RXD
GND