Selective Access Policy

Missouri Repeater Council, Inc.

 

Selective Access Policy and Guidelines
Copyright 2016

 

INTRODUCTION

The Missouri Repeater Council Selective Access Policy and Guidelines replaces the previously published CTCSS/DCS Map and Guidelines. The original CTCSS/DCS regions have been realigned with the eight (8) coordination areas around the state. The areas have been given a number along with the name for reference purposes.

The original CTCSS and DCS assignments per area have been retained. They are the Primary CTCSS tone and DCS code respectively in areas that were not realigned. Tones and codes in the old areas that have been realigned are now secondary tones and codes in Area 7 – West Central and Area 8 – Southwest.

This document adds selective access code recommendations for the digital modes of DMR, P25, NXDN and Yaesu System Fusion (YSF).

For CTCSS, DCS and YSF, both primary and secondary tones/codes are assigned for each Selective Access Area. The assigned tones and codes are shown below in the Selective Access Area Tone and Code Assignment section of this document.

The selection of the tones and codes takes into account the published selective access guidelines of the neighboring states.

POLICY

  1. All new coordination recommendations shall include a Selective Access Method as a condition of coordination.
  2. All existing coordinated systems shall be grandfathered unless there is a significant change in coordination parameters. At such change, a Selective Access Method shall be assigned.
  3. All coordinated system in counties that were impacted by the realignment with the Coordination Areas will have use of the previous tone and code recommendations on existing repeater systems grandfathered unless there is a significant change in the coordination parameters. At such change, a Selective Access Method shall be assigned.
  4. All grandfathered systems are encouraged to implement a Selective Access Method in accordance with this document.
  5. Yaesu System Fusion coordination will have two Selective Access Methods. CTCSS or DCS for the analog mode and YSF DSQ for the digital mode.
  6. Digital Modes shall not utilize default or “all access” codes such as P25 codes $293, $F7E, $F7F, NXDN RAN 0 and YSF DSQ 0 (off).  The use of YSF DSQ 0 is grandfathered until Yaesu implements per memory DSQ settings in their radios.
  7. The use of DMR Color Code 1 is grandfathered on existing systems, but will not be utilized for a new coordination.

SELECTIVE ACCESS METHODS

Continuous Tone Coded Squelch System (CTCSS)

This access method uses a sub-audible tone to un-squelch the radio. It is also known as Motorola Private Line or “PL”. The MRC guideline only utilizes the EIA recommended tones which are implemented by most all equipment manufacturers. Both a primary and a secondary CTCSS tone are assigned to an area.

Digital Code Squelch (DCS)

This access method utilizes a slow speed data stream that passes as sub-audible data to un-squelch the radio. It is also known as Motorola Digital Private Line or “DPL”. The DCS codes can be inverted (from a binary perspective) and thus some codes are the inverse of another.   The MRC guidelines do not use any DCS codes that would be the “inverted” code of another. Both a primary and a secondary code are assigned to an area.

DMR Color Code (CC)

The Color Code (CC) is used to control access to a DMR system. The use of Color Code is required for all systems. Color Codes range from 0 to 15 (16 total). The MRC guidelines do not allow the use of CC 0 or CC 1 on coordinated systems.

P25 Network Access Code (NAC)

The NAC is used to control access to a P25 system. The use of NAC is required for all P25 systems. It is a 3 digit hexadecimal number. There are 4096 possible NACs.   The MRC guidelines do not allow the use of NAC $293, $F7E and $F7F on coordinated systems.

NXDN Radio Access Number (RAN)

The RAN is used to control access to Kenwood’s NXDN and Icom’s IDAS systems. There are 63 RAN codes. The MRC guidelines do not allow the use of RAN 0 on coordinated systems.

Yaesu System Fusion Digital SQuelch Code (YSF DSQ)

The DSQ is used to control access to the Yaesu Fusion digital mode. There are 126 codes. The MRC guidelines do not allow the use of DSQ 0 on coordinated systems. The use of YSF DSQ 0 is grandfathered until Yaesu implements per memory DSQ settings in their radios.

SELECTIVE ACCEDSS TONE AND CODE ASSIGNMENTS

The state has been divided into eight (8) Coordination Areas. Each area is assigned CTCSS, DCS, DMR Color Code, P25 NAC, NXDN RAN and Yaesu System Fusion (YSF) DSQ tones or codes. For CTCSS, DCS and YSF DSQ, both primary and alternate tones/codes have been assigned. This is to allow for flexibility in assigning Selective Access tones and/or codes for statewide Low Power 440 MHz Repeaters, statewide Shared Non-Protected (SNP) VHF repeaters and in the case where the primary assignment does not work.

The areas are defined as follows:

Area 1 – Northeast
The counties of Putnam, Schuyler, Scotland, Clark, Sullivan, Adair, Knox, Lewis, Linn, Macon, Shelby and Marion.

Primary CTCSS Secondary
CTCSS
Primary
DCS
Secondary
DCS
DMR
CC
P25
NAC
NXDN RAN Primary YSF DSQ Secondary
YSF DSQ

103.5

82.5 114 343 9 $40B 28 1 101

 

Area 2 – East Central
The counties of Ralls, Pike, Lincoln, Montgomery, Warren, St. Charles, St. Louis, Gasconade, Franklin, Jefferson and the independent city of St. Louis.

Primary CTCSS Secondary
CTCSS
Primary
DCS
Secondary
DCS
DMR
CC
P25
NAC
NXDN RAN Primary YSF DSQ Secondary
YSF DSQ
141.3 79.7 411 172 2 $585 37 2 102

 

Area 3 – Southeast
The counties of Washington, St. Francois, Ste. Genevieve, Perry, Iron, Madison, Bollinger, Cape Girardeau, Reynolds, Wayne, Scott, Butler, Stoddard, Mississippi, Dunklin, New Madrid and Pemiscot.

Primary CTCSS Secondary
CTCSS
Primary
DCS
Secondary
DCS
DMR
CC
P25
NAC
NXDN RAN Primary YSF DSQ Secondary
YSF DSQ
100.0 97.4 073 156 10 $3E8 27 3 103

 

Area 4 – South Central
The counties of Laclede, Pulaski, Phelps, Crawford, Dent, Wright, Texas, Shannon, Douglas, Ozark, Howell, Oregon, Carter and Ripley.

Primary CTCSS Secondary
CTCSS
Primary
DCS
Secondary
DCS
DMR
CC
P25
NAC
NXDN RAN Primary YSF DSQ Secondary
YSF DSQ
110.9 85.4 703 143 12 $455 30 4 104

 

Area 5 – Central
The counties of Chariton, Randolph, Monroe, Audrain, Saline, Howard, Boone, Callaway, Cooper Moniteau, Cole, Osage, Morgan, Miller, Maries, Camden, Pettis, Benton and Hickory.

Primary CTCSS Secondary
CTCSS
Primary
DCS
Secondary
DCS
DMR
CC
P25
NAC
NXDN RAN Primary YSF DSQ Secondary
YSF DSQ
127.3 156.7 306 114 3 $4F9 34 5 105

The counties of Pettis, Benton and Hickory were moved from CTCSS/DCS Area 7 and will have the previous tone/code recommendation of 107.2 Hz and 606 that is in use on existing repeater systems grandfathered.


Area 6 – Northwest
The counties of Atchison, Nodaway, Worth, Harrison, Mercer, Holt, Andrew, Gentry, DeKalb, Daviess, Grundy, Caldwell, Livingston, Buchanan and Clinton.

Primary CTCSS Secondary
CTCSS
Primary
DCS
Secondary
DCS
DMR
CC
P25
NAC
NXDN RAN Primary YSF DSQ Secondary
YSF DSQ
94.8 110.9 023 155 7 $3B4 25 6 106

The counties of Buchanan and Clinton were moved from CTCSS/DCS Area 10 and will have the previous tone/code recommendation of 151.4 Hz and 205 that is in use on existing repeater systems grandfathered.


Area 7 – West Central
The counties of Platte, Clay, Jackson, Cass, Bates, Ray, Carroll, Lafayette, Johnson, Henry and St. Clair.

Primary CTCSS Secondary
CTCSS
Primary
DCS
Secondary
DCS
DMR
CC
P25
NAC
NXDN RAN Primary YSF DSQ Secondary
YSF DSQ
151.4 107.2 205 606 4 $5EA 39 7 107

The counties of Johnson, Henry and St. Clair were moved from CTCSS/DCS area 7. The previous tone of 107.2 Hz and code of 503 are now the Secondary tone and Code and will remain a valid tone/code selection for the area.

The county of Bates was moved from CTCSS/DCS area 9 and will have the previous tone/code recommendation of 91.5 Hz and 503 that is in use on existing repeater systems grandfathered.

The counties of Ray, Carroll and Lafayette were moved from CTCSS/DCS area 6 and will have the previous tone/code recommendation of 94.8 Hz and 203 that is in use on existing repeater systems grandfathered.


Area 8 – Southwest
The counties of Lawrence, Greene, Webster, Christian, McDonald, Barry, Stone, Taney, Vernon, Barton, Jasper, Newton, Cedar, Polk, Dallas and Dade.

Primary CTCSS Secondary
CTCSS
Primary
DCS
Secondary
DCS
DMR
CC
P25
NAC
NXDN RAN Primary YSF DSQ Secondary
YSF DSQ
162.2 91.5 165 503 4 $656 42 8 108

The counties of Vernon, Barton, Jasper and Newton were moved from CTCSS/DCS area 9. The previous tone of 91.5 and code of 503 are now the Secondary tone and Code and will remain a valid tone/code selection for the area.

The counties of Cedar, Polk, Dallas and Dade were moved from CTCSS/DCS area 7 and will have the previous tone/code recommendation of 107.2 Hz and 606 that is in use on existing repeater systems grandfathered.

APPENDIX

Selective Access Area Tone/Code Table

Area # Primary CTCSS Secondary CTCSS Primary DCS Secondary DCS DMR CC P25 NAC NXDN RAN Primary YSF DSQ Secondary YSF DSQ
1 103.5 82.5 114 343 9 $40B 28 1 101
2 141.3 79.7 411 172 2 $585 37 2 102
3 100.0 97.4 073 156 10 $3E8 27 3 103
4 110.9 85.4 703 143 12 $455 30 4 104
5 127.3 156.7 306 114 3 $4F9 34 5 105
6 94.8 110.9 023 155 7 $3B4 25 6 106
7 151.4 107.2 205 606 4 $5EA 39 7 107
8 162.2 91.5 165 503 5 $656 42 8 108

 

SELECTIVE ACCESS AREA MAP

Selective Access Map in bmp

 

If you have any questions concerning this plan, please contact the State Frequency Coordinator or one of the Assistant Coordinators.

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