Cisco Systems 7500 Series manual RSP Eeprom, RSP Asynchronous Serial Ports-Console and Auxiliary

Chapter 1 Cisco 7500 Series Product Overview

Route Switch Processor Overview

RSP EEPROM

An electrically erasable programmable read-only memory (EEPROM) component on the RSP stores board-specific information such as the board serial number, part number, controller type, hardware revision, and other details unique to each board. This EEPROM is not a spare and cannot be programmed in the field.

RSP Asynchronous Serial Ports—Console and Auxiliary

Note

Note

Note

Two asynchronous EIA/TIA-232 serial ports on the RSP, the console and auxiliary ports, provide the means for connecting a terminal, modem, CSU, DSU, or other external device for configuring, managing, or connecting to the system. A data circuit-terminating equipment (DCE) EIA/TIA-232 receptacle console port on the RSP provides a direct connection for a console terminal.

EIA/TIA-232 was known as recommended standard RS-232 before its acceptance as a standard by the Electronic Industries Association (EIA) and Telecommunications Industry Association (TIA).

The adjacent DTE EIA/TIA-232 plug auxiliary port supports flow control and is often used to connect a modem, a DSU/CSU, or other optional equipment for Telnet management of the attached device.

The console and auxiliary ports support asynchronous transmission. Asynchronous transmission uses control bits to indicate the beginning and end of characters, rather than precise timing. Serial interface ports on serial interface processors and port adapters support synchronous transmission, which maintains precise clocking between the transmitter and receiver by sending frames of information that consist of separate clock signals along with the data signals.

When connecting serial devices, ensure that the devices support the proper transmission timing methods for the respective port: asynchronous for the console and auxiliary ports, and synchronous for the serial ports on serial interface processors and port adapters.

The following sections describe the pinouts for the console and auxiliary connectors and cables for the RSPs:

•RSP Console Port Pinout, page 1-44

•RSP Auxiliary Port Pinout, page 1-45

•RSP2, RSP4/4+, and RSP8 Console and Auxiliary Y-Cable Pinouts, page 1-45(Specific differences between RSPs are clearly noted.)

The console and auxiliary cables are shown in Figure 3-22 on page 3-32. These cables can be used with all RSPs. The console Y-cable, CAB-RSP2(4)CON, and auxiliary Y-cable, CAB-RSP2(4)AUX, are shown in Figure 3-23 on page 3-33and Figure 3-24 on page 3-33, respectively. These cables can be used with the RSP2, RSP4/4+, or RSP8 in the Cisco 7507 and Cisco 7513 routers.

RSP Console Port Pinout

The console port on the RSP is an EIA/TIA-232 DCE DB-25 receptacle. Both the

Data Set Ready (DSR) and Data Carrier Detect (DCD) signals are active when the system is running. The console port does not support hardware flow or modem control. The console port requires a straight-through EIA/TIA-232 cable. Table 1-13lists the console port pinout.

	Cisco 7500 Series Installation and Configuration Guide
1-44	OL-5008-03 B0