RFC 395

SWITCH SETTINGS ON IMPS AND TIPS 🎀

Okay bestie, so this is RFC 395, and it's giving classic early-Internet energy ✨ It was written by John M. McQuillan of Bolt Beranek and Newman Inc. (NIC 11587) on 3 October 1972, for the Network Working Group. No category is listed, and it neither updates nor obsoletes anything 💅

This note describes the switches on the front panel of IMPs and TIPs that matter for the network software to run correctly 🧚 Setting them wrong has caused some drama in the past, so this RFC will be updated as needed to tell site personnel about any changes to the settings 🫶

A. 516 IMPs

The IMP at your site is a model 516 if it has a gray cabinet and two rows of indicator lights on the front panel. Ngl, you can't miss it 🌈 The correct switch settings are:

1. Sense switches 1,2,3 and 4: OFF (DOWN)
2. PFI/PFH: PFI (UP)
3. HALT INH: OFF (DOWN)
4. W.D.T.: OFF (DOWN)
5. AUTO RSTRT: ON (UP)
6. MEMORY PRTCT: OFF (DOWN)

B. 316 IMPs and TIPs

The IMP at your site is a model 316 if it is a TIP, or if it's in a black cabinet and has one row of indicator lights on the front panel 🖤 The setting is:

1. Sense switches 1,2,3,4: OFF (top half depressed)

Site personnel are asked to keep a copy of this RFC near the IMP and to check the switch settings there. The Honeywell field engineers who do preventive maintenance have also been asked to use this note as a checklist. Iconic teamwork 👑

       [ This RFC was put into machine readable form for entry ]
       [ into the online RFC archives by BBN Corp. under the   ]
       [ direction of Alex McKenzie.                      1/97 ]