Kenwood TM-D710GE - Manual (Page 50)

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06 APRS Networks
• UITRACE
UITRACE: ON
ALIAS: TEMP
(This allows TM‑D710 or RC‑D710 to always be a temporary digipeater at any time and anywhere in support of the TEMPn‑N
path.)
● Example 2:
This is a general recommendation for permanent digipeaters installed at a high location.
• UIDIGI
UIDIGI: ON
ALIAS: SAR
(other local paths can be defined here)
Note:
◆ SAR stands for “Search and Rescue”.
• UIFLOOD
UIFLOOD: ON
ALIAS: SS or SSS
SUBSTITUTION: ID
(where SS or SSS is the abbreviation of state or ARRL section)
• UITRACE
UITRACE: ON
ALIAS: WIDE
Proper Configuration (Written by Bob Bruninga, WB4APR)
New‑N Paradigm recommends three major routing paths. The most important is the National Standard of WIDEn‑N
(usually 2‑2). It should always be used for routine operations. However there are two other possible network
arrangements for special situations: SSn‑N and TEMPn‑N.
SSn‑N is for state or ARRL section communication special nets. These nets are called up for drills or for emergencies.
During these periods, it is desirable to have all APRS participants over the state or section area to be able to
communicate among each other. In some states, this may take more than a 2‑hop path. But using more than 2 hops
also causes many packets to go outside of the state and to add QRM in adjacent areas which is poor operating practice.
To allow longer hops within the state or section for these events, the SSn‑N routing mechanism can be used. For
example, using WIDE3‑3 from the middle of Maryland would reach all digipeaters in Maryland, but someone in the far
west or far southeast would need 5 hops. But such a 5‑hop path would cause QRM over 13 states! However, by using
the state routing path of MD5‑5, the sender’s packets will go a full 5 hops in Maryland, but will not go into any adjoining
states. In fact, for the user in the center that only needs 3 hops, it does not make any difference to use MD5-5 or MD3-
3, because in either case, his packets will hit all the digipeaters in Maryland. So for state‑wide drills, the recommended
path is MD5‑5 for all participants anywhere in the state.
The TEMPn‑N system is an emergency backup system that is inherent in all TM‑D700 and TM‑D710 mobile
transceivers. These transceivers can all be used as backup emergency digipeaters in support of special needs. All
mobiles should be programmed to act as digipeaters for TEMPn‑N packets. In this way, these mobiles are always ready
and enabled to act as digipeaters for this special path but, on the other hand, they do not digipeat any other packets so
they do not add any QRM to normal operations (using WIDEn‑N or SSn‑N). But at any time, someone in a valley, or after
digipeaters are lost in an emergency, the path of TEMPn‑N might be able to get out by hopping mobile to mobile.
To further benefit this alternate backup digipeating technique, some special battery-powered backup digipeaters at high
locations can also support this path.