Cisco Systems 7200 VXR manual Connecting to the Console and Auxiliary Ports, Pin Jackscrew

Chapter 3 Installing a Cisco 7200 VXR Router

Connecting I/O Controller, NPE-G1, or NPE-G2 Cables

The MII port uses two 56 screw-type locks, called jackscrews, to secure the cable or transceiver to the port. MII cables and transceivers have knurled thumbscrews that you fasten to the jackscrews on the MII port and tighten with your fingers. Use the jackscrews to secure your MII cable to the MII port.

Figure 3-27 MII Port

1

2

1Pin 1

2Jackscrew

3

89391

3Pin 21

Table 3-12lists the pinouts and signals for the I/O controller MII port.

Table 3-12		MII Port Pinouts
Pin1	In		Out	I/O	Description
14–17	—		Yes	—	Transmit Data (TxD)
12	Yes		—	—	Transmit Clock (Tx_CLK)2
11	—		Yes	—	Transmit Error (Tx_ER)
13	—		Yes	—	Transmit Enable (Tx_EN)
3	—		Yes	—	MII Data Clock (MDC)
4–7	Yes		—	—	Receive Data (RxD)
9	Yes		—	—	Receive Clock (Rx_CLK)2
10	Yes		—	—	Receive Error (Rx_ER)
8	Yes		—	—	Receive Data Valid (Rx_DV)
18	Yes		—	—	Collision (COL)
19	Yes		—	—	Carrier Sense (CRS)
2	—		—	Yes	MII Data Input/Output (MDIO)
22–39	—		—	—	Common (ground)
1, 20,	—		—	—	+5.0 volts (V)
21, 40

1.Any pins not indicated are not used.

2.Tx_CLK and Rx_CLK are provided by the external transceiver.

Connecting to the Console and Auxiliary Ports

The NPE-G1, NPE-G2, and all I/O controllers have a DCE-mode console port for connecting a console terminal, and a DTE-mode auxiliary port for connecting a modem or other DCE device (such as a CSU/DSU or other router) to your router.

Cisco 7200 VXR Installation and Configuration Guide

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