Cisco RSP2 - Route Switch Processor 2 Installation And Configuration Manual page 77

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Console Port Signals
The console port on the RSP2 is an EIA/TIA-232, DCE, DB-25 receptacle. Both Data Set Ready (DSR)
and Data Carrier Detect (DCD) are active when the system is running. The Request To Send (RTS) signal
tracks the state of the Clear To Send (CTS) input. The console port does not support modem control or
hardware flow control. The console port requires a straight-through EIA/TIA-232 cable.
the signals used on this port.
Table 14
Pin
1
2
3
6
7
8
Auxiliary Port Signals
The auxiliary port on the RSP2 is an EIA/TIA-232, DTE, DB-25 plug to which you can attach a CSU or
DSU or other equipment in order to access the router from the network. The asynchronous auxiliary port
supports hardware flow control and modem control.
Table 15
Pin
2
3
4
5
6
7
8
20
OL-4923-01 B0
Using Flash Memory, page 85
Console Port Signals
Signal
GND
TxD
RxD
DSR
GND
DCD
Auxiliary Port Signals
Signal
TxD
RxD
RTS
CTS
DSR
Signal Ground
CD
DTR
Direction
–
<—
—>
—>
–
—>
Table 15 lists the signals used on this port.
Direction Description
—> Transmit Data
<— Receive Data
—> Request To Send (used for hardware flow
control)
<— Clear To Send (used for hardware flow
control)
<— Data Set Ready
– Signal Ground
<— Carrier Detect (used for modem control)
—> Data Terminal Ready (used for modem
control only)
Table 14
Description
Ground
Transmit Data
Receive Data
Data Set Ready (always on)
Ground
Data Carrier Detect (always on)
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