Buck Rogers K4ABT Návod k obsluze stáhnout pdf (Strana 25)

The Packet Radio “2 N 1” Handbook by Buck Rogers K4ABT

Section 1; Packet Radio “The Basics” Section 2; The X1J4 System Node Operator’s (SNO) Handbook

Section II; TheNET X1J4 System Node Operators Handbook __ Page 25

THE FOLLOWING ARE DEFINITIONS OF TERMS DEFINITIONS ASSOCIATED WITH THE X1J4 NODE:

• DIGIPEATER - A station capable of digitally repeating AX.25 frames as specified in the AX.25 protocol

specification. Generally, refers to an unattended, wide-coverage digital repeater, often located on a hilltop.

• NODE - A packet radio station utilizing TNC2 hardware and implementing an EPROM that contains the

theNET X1 firmware. In most applications, this refers to an unattended, wide-coverage station located at high

elevations such as a hilltop, mountain, tall-tower, local water supply tower, or high-rise building.

• SYSOP - The node SYStem OPerator, or the Network MAnager who performs administrative configuration of

the X1 node.

• USER - Any amateur packet radio station using AX.25 protocol. In the context of this document, a BBS or

other automated server is considered a "user".

• DUAL-FREQUENCY Node - A pair of TheNET X1 nodes operating on two different frequencies, and

coupled together by means of an RS232 cable.

• MULTI-FREQUENCY Node - Three or more TheNET X1 nodes operating on different frequencies, and

interconnected via their RS232 ports using a diode-matrix coupler.

• LINK - An AX.25 connection involving a node at one or both ends. Node-to-node links always use AX.25v2

protocol. User-to-node links use AX.25v2 protocol if the user's TNC supports it, otherwise AX.25v1.

• UPLINK - An AX.25 connection between a user and a node, initiated by the user. An uplink is usually a

direct connection, but may be digipeated if necessary.

• DOWNLINK - An AX.25 connection between a node and a user, initiated by the node. A downlink is usually

a direct connection, but may be digipeated if necessary.

• CROSSLINK - An AX.25 connection between two adjacent nodes. A crosslink is usually a direct connection,

but may be digipeated if necessary. A crosslink between two nodes is initiated by one of the nodes when first

establishing a circuit which traverses the route segment between the two nodes.

• LOCKED ROUTE - A path or route that has been installed into the route and/or node table of a TheNET

node. This method of route control presents the node sysop with a means of “locking” routes between nodes.

Locking routes also serves as a safeguard that assures the sysop that the nodes will use the same route(s)

regardless of atmospheric conditions or “lift” propagation.

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Buck Rogers K4ABT Návod k obsluze Strana 25