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Cisco ONS 15540 ESPx Hardware Installation Guide
78-16436-01
Chapter 1 Product Overview
Cisco ONS 15540 ESPx Components
The auxiliary port is a female RJ-45 receptacle used for connection to a modem.
A three inch RJ-45 cable ships with the processor card for use with the auxiliary
port. This cable is necessary for proper use of the auxiliary port. Attach this cable
to the auxiliary port before attaching your own cables to the auxiliary port using
the proper coupler. See
for the auxiliary port pinouts on the processor
card.
Table 1-3
Console Port Pinouts DB-25 DCE
Pin Number
Console
Direction
Circuit
Function
1
N/A
gnd
Ground
2
Input
rxd
N/A
3
Output
txd
N/A
4
N/A
RTS
Tied together
5
N/A
CTS
Tied together
6
Output
DCD
N/A
7
N/A
gnd
Ground
8
Output
DCD
N/A
11
N/A
rsvd
N/A
13
N/A
gnd
Ground
19
N/A
rsvd (y cable)
N/A
20
Input
DTR
N/A
Table 1-4
Auxiliary Port Pinouts for the Cisco ONS 15540 ESPx
Pin Number
Direction
Circuit
Function
1
Output
DSR
Data set ready
2
Input
DCD
Data carrier detect
3
Input
DTR
Data terminal ready
4
S/gnd
N/A
Signal ground
5
Output
TXD
Transmit data
