Kenwood TM-D710GE User Manual download pdf (Page 50)

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dened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 Conguration (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dierence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benetthisalternatebackupdigipeatingtechnique,somespecialbattery-poweredbackupdigipeatersathigh

locations can also support this path.

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Kenwood TM-D710GE User Manual Page 50

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