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DWG ID: 181-0101-00A
Date: 2003-09-26
respond that it received the packet, by returning an acknowledgement packet by the same
path to the original station. This is often called end-to-end acknowledgment.
To send unconnected type packets like broadcast messages or BEACONs VIA a
digipeater, the UNPROTO command is used to set the path,
UNPROTO ALL VIA DIGI3
An advanced type of digipeater function for UI (unconnected-information) is also
available, configured by its own set of commands. It is described in another section,
called “Advanced Digipeating”.
8.7
Advanced Digipeating
When establishing a large coverage area, one or more (sometimes, many) digipeater
stations may be required.
Using the same digipeater alias in more than one digipeater is allowed, and can simplify
system programming.
The TALON includes UI Digipeating commands that can be used to deal with
inefficiencies that can arise when a number of digipeaters using the same generic names
are located in the same area, and can transmit at the same time. These special digipeater
functions work only with UI (unconnected information) type packets.
The command UIDIGI may be used to set up to four additional aliases/call signs for
"special" Digipeating service. To-be-digipeated packets received containing one of these
aliases will be repeated (once) with the call sign (MYCALL) of the digipeater substituted
for the alias in the digipeated frame.
UIFLOOD is a bit more exotic. It provides for multi-hop Digipeating with just one
digipeater address per packet, thereby keeping the transmission time short. To digipeat
through three TALONs supporting the UIFLOOD command, a reporting station might set
a GPS position path as GPATH GPS via wide3-3.
A digipeater TALON supporting "wide" set by the UIFLOOD command and hearing the
reporting station's transmission would then repeat the UI location packet (assuming it had
not done so already, within a preset time), using an address of wide3-2. In turn each
similar digipeater down line would digi the reporting station's UI packet and reduce
(decrement) the SSID of the digipeater address again.
A TALON using UIFLOOD has the option of inserting MYCALL in the digipeater field
of a repeated packet, creating two digipeater addresses rather than one, in each
transmitted packet.
