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EDACS.txt
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****************************************************************************
* *
* *
* Edmonton Public Safety and Public Works *
* *
* Author - Clayton Caron *
* *
* *
* *
* System Type: EDACS Standard *
* System Voice: ProVoice and Analog January 15, 2017 *
* *
************************************************************************
Sources
www.radioreference.com/apps/db/?sid=1328
www.itu.int/dms_pub/itu-r/opb/rep/R-REP-M.2014-1998-PDF-E.pdf
www.eccpage.com/bch3.c
wiki.radioreference.com/index.php/EDACS_Fleetmap
www.sigidwiki.com/wiki/EDACS
*users.netropolis.net/maverick/scanners/edacs.htm
*Accessed via https://archive.org/web/
================================
EDACS Trunking Control Channel
================================
Modulation
Gaussian Frequency-Shift Keying (GFSK) digital modulation
Baud Rate
9600 Baud
Frame Sync
Frame synchronization is accomplished by sending the following
48 bit sequence (Preamble + Barker + Preamble):
010101010101010101010111000100100101010101010101
or
0x555557125555 Hexadecimal
Messages
After transmission of the frame synchronization sequence, two data
blocks are sent which both consist of 120 bits. Each block contains
3, 40 bit copies of a message, with the middle copy being inverted.
These repeated bits can then be used to correct errors by ignoring
any single wayward bit in each of the 40 triplets.
+--------------------------------------------+
| Frame (30 ms) |
+--------------------------------------------+
| | | | | __ | | | __ | |
| P | B | P | M1 | M1 | M1 | M2 | M2 | M2 |
| | | | | | | | | |
+----+----+----+----+----+----+----+----+----+
^ ^ ^ \____________/ \____________/
| | | ^ ^
Preamble| Preamble | |
(21 bits)|(16 bits) Message Message
| No. 1 No. 2
Barker (40*3 bits) (40*3 bits)
(11 bits)
Message
+---------+------------------------------+
| Bits | Function |
+---------+------------------------------+
| 0 - 7 | Command bits |
+---------+------------------------------+
| 8 - 12 | Logical channel number (LCN) |
+---------+------------------------------+
| 13 - 16 | Status bits |
+---------+------------------------------+
| 17 - 19 | Agency ID |\
+---------+------------------------------+ |
| 20 - 23 | Fleet ID | |<--Talkgroup
+---------+------------------------------+ |
| 24 - 27 | Subfleet ID |/
+---------+------------------------------+
| 28 - 39 | Error correction polynomial |
+---------+------------------------------+
Commands
0xEC - Phone patch channel assignment
0xEE - Voice channel assignment
0xEF - Data channel assignment
0xFC - Idle channel
0xFD - ID bits give system ID; possibly includes status bits as well
Note: I have only included frequently observed commands and commands described
in edacs.htm. 50+ more unknown 'commands' were seen, and others likely exist,
however I believe they are garbage values, or values assoiciated with the
unknown status bits.
Status bits
The first three status bits are unknown. The fourth bit is potentially
a group call if cleared, and an individual call if set. In the case of
an individual call bits 17-27 would indicate the radio ID rather than
the talkgroup.
AFS
EDACS talkgroups are divided into agencies. Each agency has a number of
fleets, and each of these fleets has a number of subfleets. This
hierarchical structure allows for filtering of group calls. If all
three fields are filled in it is a subfleet call, and only those who
are in that subfleet will hear it. If subfleet is left blank it is a
fleet call and everyone within that fleet will respond, regardless of
subfleet. If agency is the only field filled, it is a group call to the
entire agency.
Error correction
In addition to the message copies, error detection and correction is
achieved using a (40, 28) binary BCH code, where the order of the
Galois field extension is 6. 12 additional bits are appended to each
message which have the capability of correcting 2 bits of the original
message.
====================
System Frequencies
====================
+-----+---------------+
| LCN | Frequency |
+-----+---------------+
| 01 | 866.0375 |
+-----+---------------+
| 13 | 866.0625 |
+-----+---------------+
| 02 | 866.2875 |
+-----+---------------+
| 14 | 866.3125 |
+-----+---------------+
| 03 | 866.5375 |
+-----+---------------+
| 15 | 866.5625 |
+-----+---------------+
| 04 | 866.7875 |
+-----+---------------+
| 16 | 866.8125 |
+-----+---------------+
| 05 | 867.0375 |
+-----+---------------+
| 17 | 867.0625 |
+-----+---------------+
| 06 | 867.2875 |
+-----+---------------+
| 18 | 867.3125 |
+-----+---------------+
| 07 | 867.5375 |
+-----+---------------+
| 19 | 867.5625 |
+-----+---------------+
| 08 | 867.7875 |
+-----+---------------+
| 20 | 867.8125 |
+-----+---------------+
| 09 | 868.0375 |
+-----+---------------+
| 10 | 868.2875 |
+-----+---------------+
| 11 | 868.5375 |
+-----+---------------+
| 12 | 868.7875 |
+-----+---------------+
===================
System Talkgroups
===================
==Police Talkgroups==
--------------------------------------------------------------------------------
DEC AFS Mode Description Tag
--------------------------------------------------------------------------------
37 00-045 A All-Call Law Dispatch
544 04-040 A PD Announcements (all channels) Law Dispatch
545 04-041 A Division A - West Law Dispatch
578 04-082 D Division A - West TAC PV Law Tac
548 04-044 A Division B - Northeast Law Dispatch
561 04-061 A Division C - Southwest Law Dispatch
547 04-043 A Division D - Downtown Law Dispatch
580 04-084 M Division D - Downtown PV Law Dispatch
546 04-042 A Division E - Southeast Law Dispatch
579 04-083 D Division E - Southeast TAC PV Law Tac
564 04-064 A Division F - Northwest Law Dispatch
594 04-102 M Division F - NorthWest TAC PV Law Tac
554 04-052 D EPS Papa Checks PV Law Tac
549 04-045 D Traffic Law Dispatch
773 06-005 D Traffic Division PV Law Tac
1574 12-046 A Police - West Edmonton Mall Law Dispatch
552 04-050 D Special Event 1 Law Tac
553 04-051 D Special Event 2 Law Tac
555 04-053 D Document Enquiries Law Tac
550 04-046 A Parks Unit Law Talk
641 05-001 D Training Tactical 1 Law Tac
642 05-002 D Training Tactical 2 Law Tac
646 05-006 A Police Training Law Tac
649 05-011 A Training Law Talk
1572 12-044 A Mutual Aid Ch 1 Law Dispatch
1573 12-045 A Mutual Aid Ch 2 Law Dispatch
1577 12-051 A Mutual Aid Ch 3 Law Dispatch
569 04-071 A Mutual A Law Talk
557 04-055 A Bylaw/Parking Enforcement Law Tac
566 04-066 A Churchhill Square Corporate Security Ops Law Talk
558 04-056 A Ottewell Community Patrol Law Talk
559 04-057 A Millwood Community Patrol Law Talk
648 05-010 A Parking Law Talk
647 05-007 A Janitors Law Talk
==Fire Talkgroups==
--------------------------------------------------------------------------------
DEC AFS Mode Description Tag
--------------------------------------------------------------------------------
1056 08-040 A FIRE All Call Fire Dispatch
1057 08-041 A Dispatch 1 Fire Dispatch
1058 08-042 A Dispatch 2 Fire Dispatch
1060 08-044 A Fire Information Fire Dispatch
1061 08-045 A Working Ch 1 Fire-Tac
1062 08-046 A Working Ch 2 Fire-Tac
1063 08-047 A Working Ch 3 Fire-Tac
1064 08-050 A Working Ch 4 Fire-Tac
1065 08-051 A Working Ch 5 Fire-Tac
1066 08-052 A Working Ch 6 Fire-Tac
1067 08-053 A Working Ch 7 Fire-Tac
1068 08-054 A Working Ch 8 Fire-Tac
1073 08-061 A Working Ch 9 Fire-Tac
1074 08-062 A Working Ch 10 Fire-Tac
1075 08-063 A Working Ch 11 Fire-Tac
1076 08-064 A Working Ch 12 Fire-Tac
1077 08-065 A Working Ch 13 Fire-Tac
1092 08-084 A Training 1 Fire-Talk
1093 08-085 A Training 2 Fire-Talk
1098 08-092 A Training 3 Fire-Talk
1099 08-093 A Training 4 Fire-Talk
1100 08-094 A Training 5 Fire-Talk
1101 08-095 A Training 6 Fire-Talk
1102 08-096 A FIRE/EMS TAC 1 Multi-Tac
1103 08-097 A FIRE/EMS TAC 2 Multi-Tac
1104 08-100 A FIRE/EMS TAC 3 Multi-Tac
1105 08-101 A FIRE/EMS TAC 4 Fire-Tac
1106 08-102 A FIRE/EMS TAC 5 Fire-Tac
1107 08-103 A FIRE/EMS TAC 6 Fire-Tac
==EMS Talkgroups==
--------------------------------------------------------------------------------
DEC AFS Mode Description Tag
--------------------------------------------------------------------------------
1153 09-001 A Dispatch-1 EMS Dispatch
1154 09-002 A Dispatch-2 EMS Dispatch
2045 15-155 A EMS Auto Dispatch EMS Dispatch
1602 12-082 A EMS Beaumont EMS Dispatch
1059 08-043 A Phone Patch 1 EMS-Talk
1156 09-004 A Ambulance Update-1 EMS-Tac
1157 09-005 A Ambulance Update-2 EMS-Tac
1158 09-006 A Ambulance Update-3 EMS-Tac
1159 09-007 A Ambulance Update-4 EMS-Tac
1160 09-010 A Ambulance Update-5 EMS-Tac
1161 09-011 A Ambulance Update-6 EMS-Tac
1131 08-133 A EMS Deployment EMS-Tac
1155 09-003 A Ambulance Information EMS-Tac
15 00-017 A EMS to Patch to St. Albert EMS EMS-Tac
1126 08-126 A Coverage outside of City EMS-Tac
1162 09-012 A EMS Transfer A EMS-Tac
1163 09-013 A EMS Transfer A EMS-Talk
1713 13-061 A Ambulance Mutual Aid 1 EMS-Tac
1725 13-075 A Ambulance Mutual Aid 2 EMS-Tac
1800 14-010 A Ambulance Fire Simulcast Multi-Tac
1094 08-086 A EMS Patch to Hospitals 1 EMS-Talk
1095 08-087 A EMS Patch to Hospitals 2 EMS-Talk
1122 08-122 A Grey Nuns Hospital Hospital
1124 08-124 A Misericordia Hospital Hospital
1125 08-125 A North East Medical Center Hospital
1121 08-121 A Royal Alexandra Hospital Hospital
1128 08-130 A Strathcona Hospital Hospital
1123 08-123 A University of Alberta Hospital Hospital
1871 14-097 A St. John Ambulance EMS-Talk
==Common Talkgroups==
--------------------------------------------------------------------------------
DEC AFS Mode Description Tag
--------------------------------------------------------------------------------
2046 15-156 A Alternate dispatch for Emergency Services Multi-Dispatch
1569 12-041 A Mutual Aid-1 Multi-Dispatch
1570 12-042 A Mutual Aid-2 Multi-Dispatch
1571 12-043 A Mutual Aid-3 Multi-Dispatch
1578 12-052 A Search and Rescue Emergency Ops
1581 12-055 A U of A Campus Security and FRS Patch Multi-Tac
==Public Works Talkgroups==
--------------------------------------------------------------------------------
DEC AFS Mode Description Tag
--------------------------------------------------------------------------------
556 04-054 A Animal Control Public Works
1697 13-041 A Drainage Public Works
1698 13-042 A Drainage Public Works
1699 13-043 A Drainage Public Works
1700 13-044 A Drainage Public Works
1702 13-046 A Drainage Public Works
1703 13-047 A Drainage Public Works
1704 13-050 A Drainage Public Works
1705 13-051 A Drainage Public Works
1706 13-052 A Drainage Public Works
1707 13-053 A Drainage Public Works
1708 13-054 A Drainage Public Works
1709 13-055 A Drainage Public Works
1710 13-056 A Drainage Public Works
1711 13-057 A Drainage Public Works
1729 13-081 A Drainage Public Works
1730 13-082 A Drainage Public Works
1731 13-083 A Drainage Public Works
1701 13-045 A Drainage Public Works
1795 14-003 A Works Crews Public Works
1799 14-007 A Works Crews Public Works
1732 13-084 A Drainage Public Works
2047 15-157 A Fleet Services Public Works
1879 14-107 A Forestry Public Works
1878 14-106 A Forestry Public Works
1761 13-121 A MES Public Works
1762 13-122 A MES Public Works
1763 13-123 A MES Public Works
1764 13-124 A MES Public Works
1765 13-125 A MES Public Works
1766 13-126 A MES Public Works
1860 14-084 A Park Rangers Public Works
1876 14-104 A Parks & Recreation Public Works
1877 14-105 A Parks & Recreation Public Works
1857 14-081 A Parks & Recreation Public Works
1875 14-103 A Parks & Recreation Public Works
1881 14-111 A Parks & Recreation Public Works
1880 14-110 A Parks & Recreation Public Works
1883 14-113 A Parks Emergency Public Works
1825 14-041 A Survey 1 Public Works
1826 14-042 A Survey 2 Public Works
1827 14-043 A Survey 3 Public Works
1828 14-044 A Survey 4 Public Works
1829 14-045 A Survey 5 Public Works
1830 14-046 A Survey 6 Public Works
1831 14-047 A Survey 7 Public Works
1832 14-050 A Survey 8 Public Works
1833 14-051 A Survey 9 Public Works
1834 14-052 A Survey 10 Public Works
1835 14-053 A Survey 11 Public Works
1836 14-054 A Survey 12 Public Works
1837 14-055 A Survey 13 Public Works
1838 14-056 A Survey 14 Public Works
1839 14-057 A Survey 15 Public Works
1840 14-060 A Survey 16 Public Works
1872 14-100 A TRA-WEST Public Works
1793 14-001 A Waste Management Public Works
1737 13-091 A Waste Water 1 Public Works
1744 13-100 A Water Treatment Public Works
1746 13-102 A Water Treatment Public Works
1747 13-103 A Water Treatment Public Works
1743 13-097 A Water Treatment Public Works
1748 13-104 A Water Treatment Public Works
1742 13-096 A Water Treatment Public Works
1741 13-095 A Water Treatment Public Works
1740 13-094 A Water Treatment Public Works
1739 13-093 A Water Treatment Public Works
1738 13-092 A Water Treatment Public Works
1796 14-004 A Work Crew Dispatch Public Works
1798 14-006 A Work Crews Public Works
==Edmonton Transit System Talkgroups==
--------------------------------------------------------------------------------
DEC AFS Mode Description Tag
--------------------------------------------------------------------------------
161 01-041 A Transit Peace Officers Ch 1 Law Talk
162 01-042 A Transit Peace Officers Ch 2 Law Talk
225 01-121 A LRT Operations & Transit Peace Officers 1 Multi-Talk
226 01-122 A LRT Operations & Transit Peace Officers 2 Multi-Talk
97 00-121 A LRT Ops Ch. 1 Transportation
98 00-122 A LRT Ops Ch. 2 Transportation
103 00-127 A LRT Inspectors Transportation
67 00-083 A LRT Operator Training Transportation
104 00-130 A LRT Maintenance Book On Transportation
105 00-131 A LRT Maintenance Transportation
106 00-132 A LRT Maintenance Transportation
107 00-133 A LRT Service Transportation
143 01-017 A Bus Emergency Transportation
2033 15-141 A ETS Patch Transportation
129 01-001 A Bus Operations 1 Transportation
130 01-002 A Bus Operations 2 Transportation
131 01-003 A Bus Operations 3 Transportation
132 01-004 A Bus Operations 4 Transportation
133 01-005 A Bus Operations 5 Transportation
135 01-007 A Bus Inspectors Ch 1 Transportation
136 01-010 A Bus Inspectors Ch 2 Transportation
68 00-084 A Bus Operator Training Transportation
137 01-011 A Bus Fleet Services Transportation
139 01-013 A Bus Charter / TPO 1 Transportation
140 01-014 A Bus Charter / TPO 2 Transportation
141 01-015 A Bus Charter / TPO 3 Transportation
65 00-081 A ETS Radio Test Transportation
134 01-006 A Bus Private Channel Transportation
==Roads Talkgroups==
--------------------------------------------------------------------------------
DEC AFS Mode Description Tag
--------------------------------------------------------------------------------
1633 12-121 A Roadways Transportation
1634 12-122 A Roadways Transportation
1635 12-123 A Roadways Transportation
1636 12-124 A Roadways Transportation
1637 12-125 A Roadways Transportation
1638 12-126 A Roadways Transportation
1639 12-127 A Roadways Transportation
1640 12-130 A Roadways Transportation
1641 12-131 A Roadways Transportation
1642 12-132 A Roadways Transportation
1643 12-133 A Roadways Transportation
1644 12-134 A Roadways Transportation
1645 12-135 A Roadways Transportation
1646 12-136 A Roadways Dispatch Transportation
1647 12-137 A Roadways Dispatch Transportation
1665 13-001 A Traffic Transportation
1666 13-002 A Traffic Transportation
1667 13-003 A Traffic Transportation
1668 13-004 A Traffic Transportation
==Stadium Talkgroups==
--------------------------------------------------------------------------------
DEC AFS Mode Description Tag
--------------------------------------------------------------------------------
1867 14-093 A Commonwealth Stadium Ch 11 Business
1868 14-094 A Commonwealth Stadium Business
1869 14-095 A Ushers Business
1870 14-096 A Cleaners Business
==Tech Talkgroups==
--------------------------------------------------------------------------------
DEC AFS Mode Description Tag
--------------------------------------------------------------------------------
643 05-003 A Administrative Maintenance Public Works
650 05-012 A Administrative Maintenance Public Works