Bulletins from the Pacific Packet Radio Society - page 097

ID0, ID1 Two bytes to indicate the protocol being used at the next higher level, level 3.
Info Usual information field

The rules for operation are very simple:

A link-level packet going from A to B will have CALLA and CALLB in the header, with no exceptions. This applies to the repeater as well, which keeps a table of how to redirect packets. All packets transmitted by the repeater have its call in the FMCALL field.

I will have more details later, but I feel that this format solves most of the problems which have been aired recently, and solves problems which are currently restricting our growth. I'm open to midcourse corrections, but they better come before we get all our EPROMs burned! The strategy allows multiple repeaters on the same frequency in an RF domain, it allows direct point-to-point contacts, and allows AMSAT to use PHASE IIIB without any person coordinating the addressing codes. I will put LIPM04.ASM and TIPM04.ASM on this medium when I feel they are adequately tested.

See you when I get back from my vacation (July 12th).

73, Hank


to: all groups
from: TAPR

After several hours of transmission of test packets, Lyle Johnson WA7GXD successfully initiated the first amateur packet radio contact with all-American hardware and software, using the Tucson Amateur Packet Radio Corporation Terminal Node Controller (TNC), at 9:12PM MST, June 25th, 1982. At the receiving end was Den Connors, KD2S, who was co-located with Lyle at the WA7GXD station.

The two-way contact lasted for about one hour, during which time several different experiments were conducted to determine optimal selection of components for the TNC modem amplifier/filter set.

Within twelve hours of first QSO, the experiment was repeated over a distance of about twenty miles, from one side of Tucson to the other, over conditions which were as bad as "less than S1" with total success. Tucson's first packet "rag-chew" lasted about 45 minutes, with different antenna and signal-level combinations attempted by Lyle and Den.

Also at the first transmissions were Marc Chamberlin WA7PXW, the TAPR Software Chairman, Margaret Morrison KC7MA, the TAPR

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