3Com S21x installation manual Txd Rxd Rts Cts Dsr

Models: S21x

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V.24 Cable

V.24 DTE Cable The following table shows the DTE pinouts for the V.24 cable.

 

Pin

Function/Signal Name

 

 

 

 

 

 

1

Shield/Frame Ground

 

 

 

 

 

 

2

TXD

 

 

 

 

 

 

3

RXD

 

 

 

 

 

 

4

RTS

 

 

 

 

 

 

5

CTS

 

 

 

 

 

 

6

DSR

 

 

 

 

 

 

7

Signal Ground

 

 

 

 

 

 

8

DCD

 

 

 

 

 

 

14

DATA RESTRAINT

 

 

 

 

 

 

15

TRANSMIT CLOCK

 

 

 

 

 

 

16

STANDBY INDICATOR

 

 

 

 

 

 

17

RECEIVE CLOCK

 

 

 

 

 

 

18

EXTERNAL RECEIVE CLOCK or V.54 Loop 3 *

 

 

 

 

 

 

20

DTR

 

 

 

 

 

 

21

V.54 Loop 2

 

 

 

 

 

 

22

(No Connection)

 

 

 

 

 

 

24

EXTERNAL TRANSMIT CLOCK

 

 

 

 

 

 

25

MAKE BUSY

 

 

 

 

 

 

 

 

 

PathBuilder S21x Switch Cabling

B-13

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3Com S21x installation manual Txd Rxd Rts Cts Dsr

S21x specifications

The 3Com S21x series represents a breakthrough in networking technology, specifically designed for small to medium-sized businesses looking for reliable and efficient networking solutions. This series is renowned for its robust features, which enhance connectivity while simplifying management, making it a go-to choice for organizations striving to optimize their network infrastructures.

One of the standout features of the 3Com S21x is its impressive port capacity. With multiple Ethernet ports, the switch facilitates seamless connections for various devices, ensuring that businesses can scale their operations without worrying about bandwidth limitations. The S21x supports both Fast Ethernet and Gigabit Ethernet connections, providing flexibility for different networking demands.

In addition to its port capabilities, the 3Com S21x incorporates advanced Power over Ethernet (PoE) technology. This feature enables the switch to deliver power to connected devices such as IP cameras, VoIP phones, and wireless access points directly through the network cable. This not only reduces the need for external power sources but also simplifies installation and lowers overall costs.

Another significant characteristic of the S21x is its Layer 2 switching capabilities. This means the device is equipped to handle basic data switching tasks efficiently, including VLAN support for network segmentation and traffic management. VLANs enhance security by isolating sensitive data traffic within specific segments, providing an additional layer of protection for network resources.

The 3Com S21x is also designed with ease of management in mind. It utilizes a user-friendly web-based interface that allows IT staff to configure and monitor the switch effortlessly. This accessibility ensures that even those with minimal networking experience can manage the device effectively, reducing the likelihood of configuration errors and downtime.

Furthermore, the S21x series is built with reliability at its core. The hardware is designed to withstand typical operating conditions in an office environment, minimizing the risk of failure and ensuring consistent performance. Coupled with a focus on energy efficiency, this series helps businesses reduce their operational costs while maintaining a green footprint.

In summary, the 3Com S21x series stands out in networking solutions for small to medium-sized enterprises, featuring a robust combination of port capacity, PoE support, Layer 2 functionality, easy management, and reliability. Organizations looking to enhance their network performance will find the S21x to be an invaluable asset, capable of growing with their needs while ensuring efficient and secure connections.