Receptacles, Cables, and Pinouts

Figure 1-10 Crossover Cable Pinout—PA-FE-TX RJ-45 Connections Between Hubs and Repeaters

Hub or repeater

3TxD+

6TxD–

1RxD+

2RxD–

Hub or repeater

3TxD+

6TxD–

1 RxD+

H3138

2 RxD–

Figure 1-11 shows the duplex SC connector (one required for both transmit and receive), and Figure 1-12 shows the simplex SC connector (two required, one for each transmit and receive) used for PA-FE-FX optical-fiber connections. These multimode optical-fiber cables are commercially available, and are not available from Cisco Systems.

Figure 1-11 PA-FE-FX Duplex SC Connector

H2214

Figure 1-12 PA-FE-FX Simplex SC Connector

H2399

Depending on the type of media you use between the MII connection on the port adapter and your switch or hub, the network side of your 100BaseT transceiver should be appropriately equipped with ST-type connectors (for optical fiber), BNC connectors, and so forth. Figure 1-13 shows the pin orientation of the female MII connector on the port adapter. The port adapters are field-replaceable units (FRUs).

The MII receptacle uses 2-56 screw-type locks, called jackscrews (shown in Figure 1-13), to secure the cable or transceiver to the MII port. MII cables and transceivers have knurled thumbscrews that you fasten to the jackscrews on the PA-FE-TX’s MII connector. Use the jackscrews to provide strain relief for your MII cable. Figure 1-13 shows the MII female connector (receptacle).

Caution Before you attach your MII transceiver to the MII receptacle on your PA-FE port adapter, ensure that your MII transceiver responds to physical sublayer (PHY) address 0 per section 22.2.4.4. “PHY Address” of the IEEE 802.3u specification; otherwise, interface problems might result.

Confirm that this capability is available on your MII transceiver with the transceiver’s vendor or in the transceiver’s documentation. If a selection for Isolation Mode is available, we recommend you use this setting (if no mention is made of PHY addressing).

Overview 1-7

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Cisco Systems PA-FE-TX manual PA-FE-FX Duplex SC Connector
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PA-FE-FX, PA-FE-TX specifications

Cisco Systems PA-FE-TX and PA-FE-FX are essential components in the realm of network switching and connectivity. These Peripheral Adapter modules are designed for use in Cisco 7000 series routers, catering to the needs of high-performance networking and offering robust features.

The PA-FE-TX module is equipped with fast Ethernet ports that provide high-speed network connectivity through twisted-pair cabling. This module supports 10/100 Mbps data rates, making it ideal for connecting end-user devices to the network while ensuring compatibility with existing infrastructure. Its auto-sensing capability facilitates smooth integration into varying network environments, allowing for seamless communication and data transfer.

On the other hand, the PA-FE-FX module is tailored for fiber optic connections, enabling high-speed data transmission over longer distances. This module supports multimode and single-mode fiber options, catering to diverse connectivity requirements. The PA-FE-FX is essential for organizations that require extended reach and minimal signal degradation, making it suitable for large campuses, data centers, and urban networking.

Both modules leverage Cisco's advanced technologies, including Quality of Service (QoS) capabilities and enhanced security features. These protocols ensure efficient bandwidth management and prioritize critical applications, improving overall network performance. Additionally, they support features such as VLAN (Virtual Local Area Network) tagging, enabling network segmentation and improved traffic management.

The physical design of these modules adheres to Cisco's standards, ensuring easy installation and hot-swappable capabilities. This means network administrators can replace or upgrade the modules without taking the entire system offline, providing greater flexibility and reducing downtime.

In summary, Cisco's PA-FE-TX and PA-FE-FX modules are integral components for organizations seeking to enhance their networking infrastructure. With their support for both copper and fiber optic connections, they provide versatile options for connecting devices, extending network reach, and improving data transfer speeds. Their compatibility with advanced networking technologies further emphasizes Cisco's commitment to delivering high-quality, reliable networking solutions for businesses of all sizes.
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