Cisco 7500 Series Configuration Manual page 67

Chapter 1 Cisco 7500 Series Product Overview
Table 1-13
Pin
1
2
3
6
7
8
RSP Auxiliary Port Pinout
The auxiliary port on the RSP is an EIA/TIA-232 DTE DB-25 plug to which you can attach external
equipment in order to access the router from the network. The Request To Send (RTS) signal tracks the
state of the Clear To Send (CTS) input. The auxiliary port supports hardware flow control and modem
control.
Table 1-14
Pin
2
3
4
5
6
7
8
20
RSP2, RSP4/4+, and RSP8 Console and Auxiliary Y-Cable Pinouts
The console and auxiliary Y-cables allow you to simultaneously connect the console or auxiliary ports
on two RSP2s, two RSP4/4+s, two RSP8s or one of each, to one console terminal or external auxiliary
device (such as a modem, and so forth). These are configured as system master and slave in RSP slots 2
and 3 in the Cisco 7507 and Cisco 7507-MX, and RSP slots 6 and 7 in the Cisco 7513 and Cisco
7513-MX.
Note The Cisco 7576 does not support master/slave configuration. In the Cisco 7576, the RSP in slot 6 is
automatically the system master for router A and the RSP in slot 7 is automatically the system master
for router B. The use of Y-cables is not supported on the Cisco 7576, and they are not included with
the unit.
The two Y-cables ship with the Cisco 7507, Cisco 7507-MX, Cisco 7513, and Cisco 7513-MX chassis
as Product Numbers CAB-RSP2CON and CAB-RSP2AUX, and are available as spare parts (=).
OL-5008-03 B0
RSP Console Port Pinout
Signal Direction
–
<—
—>
—>
–
—>
Table 1-14 lists the auxiliary port pinout.
RSP Auxiliary Port Pinout
Signal
Direction Signal Description
—> Transmit Data (TxD)
<— Receive Data (RxD)
—> Request To Send (RTS); used for hardware flow control
<— Clear To Send (CTS); used for hardware flow control
<— Data Set Ready (DSR)
– Signal Ground
<— Carrier Detect (CD); used for modem control
—> Data Terminal Ready (DTR); used for modem control only
Signal Description
Ground (GND)
Transmit Data (TxD)
Receive Data RxD)
Data Set Ready (DSR); always on
Ground (GND)
Data Carrier Detect (DCD); always on
Cisco 7500 Series Installation and Configuration Guide
Route Switch Processor Overview
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