B-29
Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide
78-15827-06B0
Appendix B Cable Specifications
Smart Serial Connection Signals and Pinouts
V.35 Smart Serial Cable Assembly
Table B-23
lists the DTE pinout and
Table B-24
lists the DCE pinout for the V.35 Smart Serial cable.
Arrows indicate signal direction: —> means DTE to DCE and <— means DCE to DTE.
Table B-22 X.21 DCE Smart Serial Cable Pinout
26-Pin
Signal Name
Note
Direction
DB-15
Pin
Signal Name
J1-21
MODE_2
Local connections
Drain
wire
Shield
—
J2-01
Shield_GND
J1-05
J1-18
I_RXD/TXD+
I_RXD/TXD–
Twisted pair no. 5
<—
<—
J2-02
J2-09
T
TRANSMIT–
J1-01
J1-14
O_TXD/RXD+
O_TXD/RXD–
Twisted pair no. 8
—>
—>
J2-04
J2-11
RECEIVE–
J1-11
J1-10
I_CTS/RTS+
I_DSR/DTR+
Twisted pair no. 3
<—
<—
J2-03
J2-10
CONTROL–
J1-08
J1-09
O_RTS/CTS
O_DTR/DSR+
Twisted pair no. 2
—>
—>
J2-05
J2-12
INDICATION
+
INDICATION
–
J1-02
J1-15
O_TXCE/RXC
+
O_TXCE/RXC
+
Twisted pair no. 7
—>
—>
J2-06
J2-13
TIMING–
J1-26
GND
Not used
Twisted pair no. 1
—
J2-08
CCT GND
Not used
Not used
Twisted pair no. 4
Not used
Not used
Twisted pair no. 6
Not used
Not used
Twisted pair no. 9
Not used
Table B-23 V.35 DTE Smart Serial Cable Pinout
26-Pin
Signal Name
Note
Direction
V.35
Pin
Signal Name
J1-22
J1-23
J1-24
MODE_1
MODE_0
MODE_DCE
Local connections
Drain
wire
Shield
—
J2-A
Shield_GND
J1-06
J1-19
B_DCD/DCD+
GND+
Twisted pair no. 1
<—
—
J2-F
RLSD
GND
J1-13
J1-26
B_LL/LL+
GND
Twisted pair no. 3
—>
—
J2-K
J2-B
LT
GND