Cisco MWR-1941-DC-2T1 Hardware Installation Guide - Page 92
EIA/TIA-449 Smart Serial Cable Assembly
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Smart Serial Connection Signals and Pinouts Appendix B Cable Specifications Table B-18 EIA/TIA-232 DCE Smart Serial Cable Pinout (continued) 26-Pin Signal Name Note J1-11 I_CTS/RTS+ Twisted pair no. 2 J1-12 I_DSR/DTR+ J1-08 O_RTS/CTS Twisted pair no. 4 J1-07 O_DTR/DSR+ J1-06 B_DCD/DCD+ Twisted pair no. 1 J1-19 GND+ J1-03 B_TXC/TXC+ Twisted pair no. 7 J1-16 GND+ J1-02 O_TXCE/RXC Twisted pair no. 8 J1-15 + GND+ J1-13 B_LL/LL+ J1-26 GND+ Twisted pair no. 3 J1-04 I_RXC/TXCE Twisted pair no. 6 J1-17 + GND+ DB-25 Direction Pin J2-06 -> J2-08 - J2-07 -> J2-15 - -> J2-17 - Signal Name RTS DTR CTS DSR DCD GND TXC GND RXC GND J2-22
B-26
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-449 Smart Serial Cable Assembly
Table B-19
lists the DTE pinout and
Table B-20
lists the DCE pinout for the EIA/TIA-449 Smart Serial
cable. Arrows indicate signal direction: —> means DTE to DCE and <— means DCE to DTE.
J1-11
J1-12
I_CTS/RTS+
I_DSR/DTR+
Twisted pair no. 2
<—
<—
J2-04
J2-20
RTS
DTR
J1-08
J1-07
O_RTS/CTS
O_DTR/DSR+
Twisted pair no. 4
—>
—>
J2-05
J2-06
CTS
DSR
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. 8
—>
—
J2-17
RXC
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. 6
<—
–
J2-24
TXCE
GND
Table B-18
EIA/TIA-232 DCE Smart Serial Cable Pinout (continued)
26-Pin
Signal Name
Note
Direction
DB-25
Pin
Signal Name
Table B-19
EIA/TIA-449 DTE Smart Serial Cable Pinout
26-Pin
Signal Name
Note
Direction
DB-37
Pin
Signal
Name
Drain
wire
Shield
—
J2-01
Shield_GN
D
J1-22
J1-24
MODE_I
MODE_DCE
Twisted pair no. 2
—
—
J2-19
J2-20
SG
RC
J1-01
J1-14
O_TXD/RXD+
O_TXD/RXD–
Twisted pair no. 5
—>
—>
J2-04
J2-22
SD+
SD–
J1-03
J1-16
B_TXC/TXC+
B_TXC/TXC–
Twisted pair no. 7
<—
<—
J2-05
J2-23
ST+
ST–
J1-05
J1-18
I_RXD/TXD+
I_RXD/TXD–
Twisted pair no. 9
<—
<—
J2-06
J2-24
RD+
RD–
J1-08
J1-09
O_RTS/CTS
O_RTS/CTS–
Twisted pair no. 1
—>
—>
J2-07
J2-25
RS+
RS–
J1-04
J1-17
I_RXC/TXCE
+
I_RXC/TXCE–
Twisted pair no. 8
<—
<—
J2-08
J2-26
RT+
RT–