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fttp/hardware.md

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Hardware

The hardware used in this experiment will be described in this file. This is crucial since some of the connections, additional adapters, drivers or software might be device-specific.

Twitter gateway

Since Twitter API works over HTTPS, which is a pretty heavy protocol, a gateway will be established on init Lab's core server (spitfire.initlab.org). This is definitely not crucial as the server we are using is an HP Microserver Gen8, but any decent nowadays' machine would do the job.

Local gateway

A relatively "powerful" machine will connect to the Twitter gateway at init Lab (over standard 100BaseT) and distribute the content to the local network over coaxial Ethernet (10BASE2). We will be using an HP Kayak Pentium II machine running Windows 98 for that purpose.

Coaxial Ethernet clients

Various 10BASE2 clients should be able to access the coaxial Ethernet network, including devices not originally included in the setup (guest devices). Only one such device is planned in the setup.

Additionally a 3Com LinkBuilder TP/8 will add 10BaseT connectivity to the coaxial network. An access point will also be attached to it to connect in a single LAN devices with 10BASE2, 10BaseT and 802.11b/g.

Dial-Up link

For the dial-up link after the 10BASE2 network, two devices with RS232 ports are needed. One of them should support 10BASE2 as well, the other one being the 286 end point. The device running both 10BASE2 and dial-up will be a Siemens-Nixdorf desktop PC with 486DX running DOS 6.22 and Windows 3.11 (eventually). For the coaxial ethernet it will use a Realtek RTL8009 ISA NIC with NE2000 packet driver and mTCP full TCP/IP stack.

The two modems used in the setup will both be Telebit FastBlazer 8840.

End point

Just to make the setup more interesting, the end poing will be a Compaq 286-SLT laptop (the first laptop to have an integrated battery and space for accomodating internal hard-drive), from which a user should be able to send tweets and receive a Twitter feed. It will be connected to the second dial-up device by RS232.