Appendix B Connector and Cable Specifications

Cable and Adapter Specifications

Rollover Cable and Adapter Pinouts

This section describes how to identify a rollover cable (used to connect to the console port) and also describes the adapter pinouts.

Identifying a Rollover Cable

To identify a rollover cable, compare the two modular ends of the cable. Hold the cable ends side-by-side, with the tab at the back. The wire connected to the pin on the outside of the left plug should be the same color as the wire connected to the pin on the outside of the right plug. (See Figure B-10.)

Figure B-10 Identifying a Rollover Cable

Pin 1 on one connector and pin 8 on the other connector should be the same color.

Pin 1

 

 

 

 

 

Pin 8

 

 

 

 

 

 

 

 

 

H10632

Adapter Pinouts

Table B-2lists the pinouts for the console port, the RJ-45-to-DB-9 adapter cable, and the console device.

Table B-2 Console Port Signaling Using a DB-9 Adapter

Switch Console

RJ-45-to-DB-9

Console

Port (DTE)

Terminal Adapter

Device

 

 

 

Signal

DB-9 Pin

Signal

 

 

 

RTS

8

CTS

 

 

 

DTR

6

DSR

 

 

 

TxD

2

RxD

 

 

 

GND

5

GND

 

 

 

GND

5

GND

 

 

 

RxD

3

TxD

 

 

 

DSR

4

DTR

 

 

 

CTS

7

RTS

 

 

 

Catalyst 3550 Multilayer Switch Hardware Installation Guide

 

OL-6155-01

B-5

 

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Cisco Systems 3550 manual Rollover Cable and Adapter Pinouts, Identifying a Rollover Cable

3550 specifications

Cisco Systems 3550 is a series of enterprise-class multilayer switches that have gained popularity in both enterprise and service provider networks. Introduced in the early 2000s, the 3550 series was designed to meet the increasing demand for advanced networking capabilities, including Layer 2 and Layer 3 switching, making it suitable for various network environments.

A standout feature of the Cisco 3550 is its support for advanced Layer 3 switching capabilities. This means it can perform routing functions similar to traditional routers while maintaining the speed and efficiency of a switch. The 3550 facilitates IP routing, enabling enhanced communication among different subnets without the need for additional routing devices.

The Cisco 3550 series is equipped with a range of ports, typically providing up to 48 Ethernet 10/100 ports and optional Gigabit Ethernet ports, ensuring scalability and flexibility in various network designs. The switches support Power over Ethernet (PoE), allowing the delivery of electrical power through Ethernet cables to connected devices, such as IP phones and wireless access points, streamlining installations and reducing cable management complexity.

Quality of Service (QoS) is another essential feature of the Cisco 3550. The switch supports advanced QoS mechanisms, which provide the ability to prioritize traffic. This is crucial in environments where bandwidth is limited, as it ensures that time-sensitive applications, like VoIP and video conferencing, receive sufficient bandwidth to function optimally.

In terms of security, the Cisco 3550 includes features such as access control lists (ACLs), port security, and VLANs (Virtual Local Area Networks). These features help in segmenting network traffic and preventing unauthorized access to sensitive information, thereby enhancing network security.

The Cisco 3550 is highly regarded for its robustness and reliability, making it a suitable choice for various organizations looking to maintain high availability in their networking environments. Its management capabilities include support for Cisco's IOS software, which offers a command-line interface for configuration, as well as options for SNMP and web-based management tools.

Overall, the Cisco Systems 3550 series is well-regarded for its multilayer switching capabilities, comprehensive feature set, and versatility in meeting the diverse needs of modern networking, making it a favored solution for businesses aiming to build efficient and secure network infrastructures.