B-3
Cisco 1240 Connected Grid Router Hardware Installation Guide
OL-26223-04
Appendix B Connector and Cable Specifications
Connector Specifications
Serial Port
For detailed information about the combination ports, see the
“Router Hardware Description”
chapter.
6
MOD-DEF(0)
Output
Grounded in SFP, indicates SFP is present
7
Rate Select
1
–
–
8
LOS
Output
Loss of Receive optical signal indicator
9
VeeR
–
GND
10
VeeR
–
GND
11
VeeR
–
GND
12
RD-
Output
Differential electrical output to PHY
13
RD+
Output
Differential electrical output to PHY
14
VeeR
–
Gnd
15
VccR
–
3.3V
16
VccT
–
3.3V
17
VeeT
–
GND
18
TD+
Input
Differential input from PHY
19
TD-
Input
Differential input from PHY
20
VeeT
–
GND
1.
Rate Select is an optional SFP input that controls receiver bandwidth when used with Fibre Channel applications. This pin is
unconnected.
Table B-4
SFP Port Specification (continued)
Pin
Signal Name
Input/Output
Signal Description
Table B-5
Serial Port Specification
RS-232
1
1.
The RS232 pinouts use the EIA-561 standard.
RS-485 Full Duplex
RS-485 Half Duplex
Pin
Signal Description (Abbreviation)
DCE
Signal
Dir
Signal
Dir
1
DCE ready, ring indicator (DSR/RI)
Output
TX+
–
TX/RX+
–
2
Received line signal detector (DCD)
Output
TX-
–
TX/RX-
–
3
DTE ready (DTR)
Input
Not used
–
Not used
–
4
Signal ground (COM)
–
COM
–
COM
–
5
Received data (RxD)
Output
Not used
Output
Not used
Bidirectional
6
Transmitted data (TxD)
Input
RX+
Input
Not used
–
7
Clear to send (CTS)
Output
Not used
Output
Not used
Bidirectional
8
Request to send (RTS)
Input
RX-
Input
Not used
–
