Installing the Switch

Powering Up

DANGER: 55H7211.

The User’s Guide also contains further informa- tion on the following steps.

Into a 19-inch rack

Fit the brackets as shown in 1 (below) to each side of the unit. Following the manufacturer’s instructions, secure the unit into the rack.

On the wall

Place the unit the right way up on a hard flat sur- face with the front facing towards you. Fit the brackets as shown in 2 (below) to each side of the unit. Place the base of the unit against the wall, ensuring that the ventilation holes face sidewards and the front panel faces upwards. Secure using suitable screws and fixings (not supplied). The wall surface should be smooth, flat, dry and sturdy. Use a plywood sheet between the unit and wall if necessary.

1As required:

a Fit a Transceiver Module b Fit a Plug-in Module

c Connect network cabling

2Connect the power cord to the IEC socket on the rear of the Switch, and to your mains socket.

The 8271 Model 612/624 Switch has no ON/OFF switch, the only method of connecting or discon- necting mains power is through the power cord.

3The Switch enters a Power On Self Test (POST). The time taken for the test to complete is depen- dent on the type of POST configured for the unit. For a new Switch that is being installed for the first time, power-up takes approximately 13 sec- onds.

4Check the status LEDs to ensure the Switch is operating correctly.

Intelligent Flow Management (IFM) should be dis- abled if the port is connected to a repeated seg- ment where the traffic is mainly local to that segment.

Further information on these steps is available in:

IBM 8271 Nways Ethernet LAN Switch

Models 612 and 624 User’s Guide,

3Part Number 55H7211

IBM 8271 Nways Ethernet LAN Switch Models 612 and 624 Quick Reference Guide, Part Number 55H7212

Part No. 02L1348 Published October 1997

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IBM 612, 614 manual Installing the Switch Powering Up, Into a 19-inch rack, On the wall

614, 612 specifications

The IBM 614 and IBM 612 are notable models in the history of IBM's computing devices, introducing advanced features and technologies that were pivotal in their respective eras. The IBM 614, launched in the early 1960s, was part of IBM's broader efforts to develop data processing solutions that could meet the growing needs of businesses. This model was primarily designed as a follow-on to the IBM 709 and addressed various limitations found in earlier systems.

One of the key features of the IBM 614 was its magnetic core memory, allowing for faster data access and increased reliability over previous drum and tape memory systems. The magnetic core was particularly significant, as it provided a substantial increase in memory capacity, enabling more complex computations and data handling. The IBM 614 was also one of the first systems to introduce time-sharing capabilities, allowing multiple users to interact with the machine simultaneously. This innovation transformed how organizations utilized computing resources, leading to enhanced productivity and efficiency.

The IBM 612, while closely related to the 614, focused on automated data processing with an emphasis on business applications. Key characteristics of the IBM 612 included a robust input/output system that facilitated faster data transfer rates compared to its predecessors. Its architecture was designed for batch processing, making it suitable for tasks such as payroll, inventory management, and other business applications requiring extensive data manipulation. The model supported various peripheral devices, such as card readers and printers, further enhancing its operational capabilities.

In terms of technologies, both models adopted transistor-based designs, moving away from vacuum tubes. This shift not only improved operational reliability but also reduced power consumption and heat generation, which were critical factors for large-scale installations. Additionally, IBM invested in languages and software that would leverage the hardware capabilities of the 614 and 612, ensuring that businesses could develop customized applications tailored to their specific needs.

The legacy of the IBM 614 and 612 continued to influence future computer designs, contributing to the evolution of computing technology and systems architecture. The advancements introduced by these models helped set the stage for IBM's subsequent innovations, solidifying the company's position as a leader in the computing industry. Today, they are remembered as foundational models that helped transition computing from a niche activity to a core business function across various industries.