Introduction
This standard details the specification for the“Ademco ® Contact ID” communications format,
originally developed by the Ademco Group, a division of Pittway Corporation.
The purpose of this standard is to detail the Contact ID signaling format such that it can be adopted by any manufacturer of digital transmitters or receivers.
Documentation and distribution of this communication format is intended to provide an across-the-board compatibility of equipment designed to this standard regardless of manufacturer.
This communications format utilises standard DTMF tones for transmission of the information.
Code Examples
For code examples on how to implement this protocol, I highly recommend looking at the Asterisk Alarm Receiver App (Written in C)
https://github.com/asterisk/asterisk/bl ... receiver.c
This app uses the excellent Asterisk IP Telephony (SIP and IAX) system as a base.
SIA-DC05 Contact ID over PSTN
PSTN Signal Requirements
The protocol transmitted to the alarm receiver is composed of three basic elements:
[*] Handshake Tone sequence,
[*] Message Blocks,
[*] Acknowledgements.
The Handshake Tone sequence consists of a pair of single-frequency tones sequenced in time.
The Message Blocks consist of a series of DTMF tone bursts separated by spaces.
The Acknowledgement Tone is a single tone burst.
The protocol transmitted to the alarm receiver is composed of three basic elements:
[*] Handshake Tone sequence,
[*] Message Blocks,
[*] Acknowledgements.
The Handshake Tone sequence consists of a pair of single-frequency tones sequenced in time.
The Message Blocks consist of a series of DTMF tone bursts separated by spaces.
The Acknowledgement Tone is a single tone burst.
Handshake Tones
The Handshake Tone sequence is produced by the RECEIVER.
The purpose is to signal the TRANSMITTER that the communication channel is ready.
The Handshake Tone sequence is emitted by the receiver after going off-hook and delaying an interval of at least 0.5 seconds but typically no greater than 2.0 seconds.
This time allows the phone network connection to settle before the communication process begins.
Handshake Tone Composition
The handshake tone sequence shall consist of:
• A burst of 1400 Hz. ±3% tone with a duration of 100 msec. ±5%
• A pause of 100 msec. ±5%
• A burst of 2300 Hz. ±3% tone with a duration of 100 msec. ±5%
Note: Transmitters shall accept a frequency error of at least ± 5% to ensure back-compatibility with older receivers.
The Handshake Tone sequence is produced by the RECEIVER.
The purpose is to signal the TRANSMITTER that the communication channel is ready.
The Handshake Tone sequence is emitted by the receiver after going off-hook and delaying an interval of at least 0.5 seconds but typically no greater than 2.0 seconds.
This time allows the phone network connection to settle before the communication process begins.
Handshake Tone Composition
The handshake tone sequence shall consist of:
• A burst of 1400 Hz. ±3% tone with a duration of 100 msec. ±5%
• A pause of 100 msec. ±5%
• A burst of 2300 Hz. ±3% tone with a duration of 100 msec. ±5%
Note: Transmitters shall accept a frequency error of at least ± 5% to ensure back-compatibility with older receivers.
Alarm Message Blocks
A Message Block is sent by the TRANSMITTER for each message in the transmitter’s message queue.
Each message block contains sufficient information to report an event in the system.
Message Block Placement
The first message block is sent beginning 250 msec. (250 min.,300 max.) after the end of either the Handshake Tone sequence or after a Kissoff (Acknowledgement) tone.
The delay is timed from the end of the tone.
Message Composition
The form of the message is:
ACCT MT QXYZ GG CCC
Where
ACCT :: A 4 Digit Account number / Client Code (0-9, B-F), used to identify the alarm panel to the alarm receiver.
MT :: Message Type. This 2-digit sequence is used to identify the Contact ID message to the receiver.
It may be transmitted as either 18 (preferred) or 98 (optional).
New receiver implementations shall accept either a 18 or a 98.
Note that some older receivers may not accept 98
Q :: Event qualifier, which gives specific event information:
1 = New Event or Opening
3 = New Restore or Closing
6 = Previously reported condition still present (Status report)
XYZ :: Event code (3 Hex digits 0-9,B-F) - See below for valid Contact ID event codes
GG :: Area / Partition number (2 Hex digits 0-9, B-F).
Use 00 to indicate that no specific area or partition information applies.
CCC :: Input / Zone number (Event reports) or User # (Open / Close reports ) (3 Hex digits 0-9,B-F ).
Use 000 to indicate that no specific input / zone or user information applies.
S = 1 Digit Hex checksum calculated such that: (Sum of all message digits + S) MOD 15 = 0
Note: A ‘0’ shall be transmitted as a 10 and valued as a 10 for checksum purposes even though it is displayed and printed as ‘0’.
It uses the same tone pair as the ‘0’ (#) key on a standard telephone.
Message Composition Data Tones
The message is sent using standard Telephone DTMF tones.
The timing of the tones shall be as follows:
Burst ON time - 50 msec. (50 min.,60 max.)
Burst OFF time- 50 msec. (50 min.,60 max.)
The details of the tones are contained in the following table.
NOTES:
[*] The digit ‘0’ is transmitted with a value of 10 and shall be counted as a 10 in the calculation of the message checksum.
[*] The DTMF pair of 941 Hz. And 1633 Hz. is not used in this format and shall not be sent.
[*] The frequency deviation on each of the above frequencies shall be ± 1.5% max.
A Message Block is sent by the TRANSMITTER for each message in the transmitter’s message queue.
Each message block contains sufficient information to report an event in the system.
Message Block Placement
The first message block is sent beginning 250 msec. (250 min.,300 max.) after the end of either the Handshake Tone sequence or after a Kissoff (Acknowledgement) tone.
The delay is timed from the end of the tone.
Message Composition
The form of the message is:
ACCT MT QXYZ GG CCC
Where
ACCT :: A 4 Digit Account number / Client Code (0-9, B-F), used to identify the alarm panel to the alarm receiver.
MT :: Message Type. This 2-digit sequence is used to identify the Contact ID message to the receiver.
It may be transmitted as either 18 (preferred) or 98 (optional).
New receiver implementations shall accept either a 18 or a 98.
Note that some older receivers may not accept 98
Q :: Event qualifier, which gives specific event information:
1 = New Event or Opening
3 = New Restore or Closing
6 = Previously reported condition still present (Status report)
XYZ :: Event code (3 Hex digits 0-9,B-F) - See below for valid Contact ID event codes
GG :: Area / Partition number (2 Hex digits 0-9, B-F).
Use 00 to indicate that no specific area or partition information applies.
CCC :: Input / Zone number (Event reports) or User # (Open / Close reports ) (3 Hex digits 0-9,B-F ).
Use 000 to indicate that no specific input / zone or user information applies.
S = 1 Digit Hex checksum calculated such that: (Sum of all message digits + S) MOD 15 = 0
Note: A ‘0’ shall be transmitted as a 10 and valued as a 10 for checksum purposes even though it is displayed and printed as ‘0’.
It uses the same tone pair as the ‘0’ (#) key on a standard telephone.
Message Composition Data Tones
The message is sent using standard Telephone DTMF tones.
The timing of the tones shall be as follows:
Burst ON time - 50 msec. (50 min.,60 max.)
Burst OFF time- 50 msec. (50 min.,60 max.)
The details of the tones are contained in the following table.
NOTES:
[*] The digit ‘0’ is transmitted with a value of 10 and shall be counted as a 10 in the calculation of the message checksum.
[*] The DTMF pair of 941 Hz. And 1633 Hz. is not used in this format and shall not be sent.
[*] The frequency deviation on each of the above frequencies shall be ± 1.5% max.
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Inter-Message Time
After sending its message, the transmitter should wait for 1.25 sec. for the start of a Kissoff Tone from the receiver.
If the start of a kissoff tone is detected, the transmitter must continue timing the tone, even if the inter-message time expires.
The panel must detect a minimum of 400 msec. of the Kissoff Tone for it to be considered to be valid.
If a Kissoff tone is detected, the transmitter should wait for the tone to end and then wait 250 msec. (250 min.,300 max.) before beginning the next message.
If no Kissoff Tone is received, the transmitter should repeat the message after the expiration of the 1.25 second inter-message interval.
Kissoff (Acknowledgement) Tone
The Kissoff tone from the receiver is used to tell the transmitter that the message has been received successfully.
The frequency of the tone shall be 1400 Hz. ±3% and shall be sent by the receiver for a minimum of 750 msec. and a maximum period of 1 second.
The transmitter must detect a minimum of 400 msec. of tone before considering the kissoff to be valid.
Note: Transmitters shall accept a frequency error of at least ± 5% to ensure back-compatibility with older receivers
Maximum Number of Attempts
The transmitter shall make up to 4 attempts to deliver a message before hanging up and redialing.
The attempts counter is reset each time a valid kissoff signal is received.
After sending its message, the transmitter should wait for 1.25 sec. for the start of a Kissoff Tone from the receiver.
If the start of a kissoff tone is detected, the transmitter must continue timing the tone, even if the inter-message time expires.
The panel must detect a minimum of 400 msec. of the Kissoff Tone for it to be considered to be valid.
If a Kissoff tone is detected, the transmitter should wait for the tone to end and then wait 250 msec. (250 min.,300 max.) before beginning the next message.
If no Kissoff Tone is received, the transmitter should repeat the message after the expiration of the 1.25 second inter-message interval.
Kissoff (Acknowledgement) Tone
The Kissoff tone from the receiver is used to tell the transmitter that the message has been received successfully.
The frequency of the tone shall be 1400 Hz. ±3% and shall be sent by the receiver for a minimum of 750 msec. and a maximum period of 1 second.
The transmitter must detect a minimum of 400 msec. of tone before considering the kissoff to be valid.
Note: Transmitters shall accept a frequency error of at least ± 5% to ensure back-compatibility with older receivers
Maximum Number of Attempts
The transmitter shall make up to 4 attempts to deliver a message before hanging up and redialing.
The attempts counter is reset each time a valid kissoff signal is received.
| ID | Event | Type | Class | Description |
| 070 | TEST | Unknown | Test/Misc | Test-Restore |
| 076 | TEST | Unknown | Test/Misc | Test – Cell Backup |
| 100 | MEDICAL | Zone | Medical | - |
| 101 | MEDICAL | Zone | Medical | PENDANT TRANSMITTER |
| 102 | MEDICAL | Zone | Medical | - |
| 103 | TECHNICIAN | Unknown | Test/Misc | UNDEFINED DSC CONTACT ID CODE |
| 104 | RESTORE | Zone | Test/Misc | DSC CID RESTORE |
| 105 | TECHNICIAN | Unknown | Test/Misc | UNDEFINED DSC CONTACT ID CODE |
| 106 | ABORT | User | General Alarms | - |
| 109 | TROUBLE | Zone | System Troubles | Tamper |
| 110 | FIRE | Zone | Fire Alarms | - |
| 111 | FIRE | Zone | Fire Alarms | SMOKE |
| 112 | FIRE | Zone | Fire Alarms | COMBUSTION |
| 113 | WATERFLOW | Zone | Fire Alarms | WATER FLOW |
| 114 | FIRE | Zone | Fire Alarms | HEAT |
| 115 | FIRE | Zone | Fire Alarms | PULL STATION |
| 116 | FIRE | Zone | Fire Alarms | DUCT |
| 117 | FIRE | Zone | Fire Alarms | FLAME |
| 118 | FIRE | Zone | Fire Alarms | NEAR ALARM |
| 11F | TECHNICIAN | Unknown | Test/Misc | UNDEFINED DSC CONTACT ID CODE |
| 120 | PANIC(audible) | Zone | Panic Alarms | AUDIBLE |
| 121 | DURESS | Zone | Panic Alarms | - |
| 122 | DURESS | Zone | Panic Alarms | SILENT |
| 123 | PANIC(audible) | Zone | Panic Alarms | AUDIBLE |
| 124 | DURESS | User | Panic Alarms | Silent |
| 125 | DURESS | User | Panic Alarms | Silent |
| 130 | BURG | Zone | Burglar Alarms | - |
| 131 | BURG | Zone | Burglar Alarms | PERIMETER |
| 132 | BURG | Zone | Burglar Alarms | INTERIOR |
| 133 | BURG | Zone | Burglar Alarms | 24 HOUR |
| 134 | BURG | Zone | Burglar Alarms | ENTRY/EXIT |
| 135 | BURG | Zone | Burglar Alarms | DAY/NIGHT |
| 136 | BURG | Zone | Burglar Alarms | OUTDOOR |
| 137 | TAMPER | Zone | Burglar Alarms | TAMPER |
| 138 | BURG | Zone | Burglar Alarms | NEAR ALARM |
| 139 | BURG | Zone | Burglar Alarms | - |
| 13E | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 140 | ALARM | Zone | General Alarms | - |
| 141 | ALARM | Zone | General Alarms | POLLING LOOP OPEN |
| 142 | TROUBLE | Zone | General Alarms | POLLING LOOP SHORT |
| 143 | TROUBLE | Zone | General Alarms | EXP MODULE FAILURE |
| 144 | TAMPER | Zone | General Alarms | SENSOR TAMPER |
| 145 | TAMPER | Zone | General Alarms | EXP MODULE TAMPER |
| 146 | BURG | Zone | General Alarms | SILENT |
| 150 | ALARM | Zone | General Alarms | - |
| 151 | ALARM | Zone | 24 Hour Non-Burglary | GAS DETECTED |
| 152 | TROUBLE | Zone | 24 Hour Non-Burglary | REFRIGERATION |
| 153 | TROUBLE | Zone | 24 Hour Non-Burglary | LOSS OF HEAT |
| 154 | TROUBLE | Zone | WATER LEAKAGE | - |
| 155 | ALARM | Zone | 24 Hour Non-Burglary | FOIL BREAK |
| 156 | ALARM | Zone | 24 Hour Non-Burglary | DAY TROUBLE |
| 157 | TROUBLE | Zone | 24 Hour Non-Burglary | LOW BOTTLED GAS LVL |
| 158 | TEMPERATURE | Zone | 24 Hour Non-Burglary | HIGH TEMP |
| 159 | TEMPERATURE | Zone | 24 Hour Non-Burglary | LOW TEMP |
| 161 | ALARM | Zone | 24 Hour Non-Burglary | LOSS OF AIR FLOW |
| 162 | ALARM | Zone | 24 Hour Non-Burglary | CARBON MONOXIDE DETECTED |
| 163 | TROUBLE | Zone | 24 Hour Non-Burglary | TANK LEVEL |
| 170 | TECHNICIAN | Unknown | Test/Misc. | undefined bad data |
| 199 | ABORT | User | Open/Close | After alarm open |
| 1B0 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 1BC | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 1C1 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 1CD | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 1CF | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 1D0 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 1DD | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 1EE | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 200 | SUPERVISORY | Zone | Fire Supervisory | FIRE SUPERVISORY |
| 201 | SUPERVISORY | Zone | Fire Supervisory | LOW WATER PRESSURE |
| 202 | SUPERVISORY | Zone | Fire Supervisory | LOW CO2 |
| 203 | SUPERVISORY | Zone | Fire Supervisory | - |
| 204 | SUPERVISORY | Zone | Fire Supervisory | LOW WATER LEVEL |
| 205 | SUPERVISORY | Zone | Fire Supervisory | PUMP ACTIVATED |
| 206 | SUPERVISORY | Zone | Fire Supervisory | PUMP FAILURE |
| 210 | SUPERVISORY | Zone | Fire Supervisory | Supervisory |
| 213 | TROUBLE | Zone | SPRINKLER TROUBLE | - |
| 271 | ALARM | Zone | General Alarms | - |
| 300 | TROUBLE | Zone | System Troubles | SYSTEM TROUBLE |
| 301 | TRBL-AC | Unknown | System Troubles | - |
| 302 | TRBL-BAT | Unknown | System Troubles | - |
| 303 | TROUBLE | Unknown | System Troubles | RAM CKSUM BAD |
| 304 | TROUBLE | Unknown | System Troubles | ROM CKSUM BAD |
| 305 | TECHNICIAN | Unknown | System Troubles | SYSTEM RESET |
| 306 | TECHNICIAN | Unknown | System Troubles | PROGRAM CHANGED |
| 307 | TECHNICIAN | Unknown | System Troubles | SELF-TEST FAILURE |
| 308 | TROUBLE | Unknown | System Troubles | SYSTEM SHUTDOWN |
| 309 | TRBL-BAT | Unknown | System Troubles | BATTERY TEST FAIL |
| 310 | TROUBLE | Zone | System Troubles | GROUND FAULT |
| 311 | TRBL-BAT | Unknown | System Troubles | BATTERY MISSING |
| 312 | TROUBLE | Unknown | System Troubles | POWER SUPPLY OVERCURRENT |
| 313 | TECHNICIAN | Unknown | System Troubles | SYSTEM ENGINEER RESET |
| 314 | TROUBLE | Unknown | System Troubles | Battery Charger Failure |
| 315 | TROUBLE | Zone | System Troubles | Trouble |
| 320 | TROUBLE | Zone | Sounder/Relay Troubles | - |
| 321 | TROUBLE | Unknown | Sounder/Relay Troubles | BELL 1 |
| 322 | TROUBLE | Unknown | Sounder/Relay Troubles | BELL 2 |
| 323 | TROUBLE | Unknown | Sounder/Relay Troubles | ALARM RELAY |
| 324 | TROUBLE | Unknown | Sounder/Relay Troubles | TROUBLE RELAY |
| 325 | TROUBLE | Unknown | Sounder/Relay Troubles | REVERSING |
| 326 | TROUBLE | Unknown | Sounder/Relay Troubles | NOTIFICATION APPLIANCE CKT #3 |
| 327 | TROUBLE | Unknown | Sounder/Relay Troubles | NOTIFICATION APPLIANCE #4 |
| 328 | RESTORE | Unknown | Sounder/Relay Troubles | SIGNAL SILENCED |
| 330 | TROUBLE | Zone | System Peripheral Troubles | SYSTEM PERIPHERAL |
| 331 | TROUBLE | Unknown | System Peripheral Troubles | POLLING LOOP OPEN |
| 332 | TROUBLE | Unknown | System Peripheral Troubles | POLLING LOOP SHORT |
| 333 | TECHNICIAN | Unknown | System Peripheral Troubles | EXPANDER MODULE FAIL |
| 334 | TROUBLE | Zone | System Peripheral Troubles | REPEATER FAILURE |
| 335 | TROUBLE | Unknown | System Peripheral Troubles | PRINT PAPER OUT |
| 336 | TROUBLE | Unknown | System Peripheral Troubles | PRINTER FAILURE |
| 337 | TROUBLE | Zone | System Peripheral Troubles | EXP MOD DC LOSS |
| 338 | TRBL-BAT | Zone | System Peripheral Troubles | EXP MOD LOW BAT |
| 339 | RESTORE | Zone | System Peripheral Troubles | EXP MOD RESET |
| 340 | TROUBLE | Zone | SYSTEM PERIPHERAL | - |
| 341 | TAMPER | Zone | System Peripheral Troubles | EXPANDER MODULE TAMPER |
| 342 | TRBL-AC | Zone | System Peripheral Troubles | EXP. MODULE AC LOSS |
| 343 | TROUBLE | Zone | System Peripheral Troubles | EXP. MODULE SELF TEST FAIL |
| 344 | TROUBLE | Zone | System Peripheral Troubles | RF RCVR JAM DETECTED |
| 350 | TECHNICIAN | Unknown | Communication Troubles | COMMUNICATION |
| 351 | TRBL-LINE | Unknown | Communication Troubles | TELCO 1 FAULT |
| 352 | TRBL-LINE | Unknown | Communication Troubles | TELCO 2 FAULT |
| 353 | TROUBLE | Unknown | Communication Troubles | RADIO XMITR FAULT |
| 354 | TECHNICIAN | Unknown | Communication Troubles | COMMUNICATION FAILED |
| 355 | TROUBLE | Unknown | Communication Troubles | RADIO SUPERVISION |
| 356 | TROUBLE | Unknown | Communication Troubles | RADIO POLLING |
| 357 | TROUBLE | Zone | Communication Troubles | LRR XMTR VSWR |
| 358 | TROUBLE | Zone | Communication Troubles | PERIODIC TEST FAILURE |
| 361 | TRBL-LINE | Unknown | Communication Troubles | - |
| 362 | TRBL-LINE | Unknown | Communication Troubles | TELCO 2 FAULT |
| 370 | TROUBLE | Zone | Protection Loop | - |
| 371 | TECHNICIAN | Zone | Protection Loop | PRTCTN LOOP OPEN |
| 372 | TECHNICIAN | Zone | Protection Loop | PRTCTN LOOP SHORT |
| 373 | TRBL-FIRE | Zone | Protection Loop | - |
| 374 | EXITFAULT | Zone | Protection Loop | - |
| 375 | TRBL-SUP | Zone | Protection Loop | PANIC ZONE TROUBLE |
| 376 | TRBL-SUP | Zone | Protection Loop | HOLD-UP ZONE TROUBLE |
| 379 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 380 | TROUBLE | Zone | Sensor | SENSOR |
| 381 | TRBL-SUP | Zone | Sensor | LOSS OF SUPER-RF |
| 382 | TRBL-SUP | Zone | Sensor | LOSS OF SUPER-RPM |
| 383 | TAMPER | Zone | Sensor | SENSOR TAMPER |
| 384 | TRBL-SUP | Zone | Sensor | SENSOR LOW BATT |
| 385 | TRBL-FIRE | Zone | Sensor | SMOKE HI SENS. |
| 386 | TRBL-FIRE | Zone | Sensor | SMOKE LO SENS. |
| 387 | TROUBLE | Zone | Sensor | INTRUSION HI SENS. |
| 388 | TROUBLE | Zone | Sensor | INTRUSION LO SENS. |
| 389 | TRBL-SUP | Zone | Sensor | DET. SELF TEST FAIL |
| 391 | TRBL-SUP | Zone | Sensor | SENSOR WATCH FAILURE |
| 392 | TROUBLE | Zone | Sensor | DRIFT COMP. ERROR |
| 393 | TROUBLE | Zone | Sensor | MAINTENANCE ALERT |
| 394 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 399 | TROUBLE | Unknown | Sounder/Relay Troubles | Trouble |
| 3F0 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 3F1 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 400 | OPEN | User | Open/Close | - |
| 401 | OPEN | User | Open/Close | - |
| 402 | OPEN | User | Open/Close | - |
| 403 | OPEN | User | Open/Close | AUTO-O/C |
| 404 | OPEN | User | Open/Close | - |
| 405 | OPEN | User | Open/Close | - |
| 406 | ABORT | User | Open/Close | - |
| 407 | OPEN | User | Open/Close | - |
| 408 | CLOSE | User | Open/Close | QUICK-ARM |
| 409 | OPEN | User | Open/Close | KEYSWITCH |
| 410 | OPEN | User | Open/Close | - |
| 411 | RESTORE | Unknown | Remote Access | REMOTE |
| 412 | RESTORE | Unknown | Remote Access | REMOTE SUCCESSFUL |
| 413 | RESTORE | Unknown | Remote Access | REMOTE UNSUCCESSFUL |
| 414 | AUTOLOG | Unknown | Remote Access | SYSTEM SHUTDOWN |
| 415 | AUTOLOG | Unknown | Remote Access | DIALER SHUTDOWN |
| 416 | AUTOLOG | Unknown | Remote Access | SUCCESSFUL UPLOAD |
| 421 | AUTOLOG | User | Access Control | ACCESS DENIED |
| 422 | AUTOLOG | User | Access Control | Access Report |
| 423 | AUTOLOG | Zone | Access Control | FORCED ACCESS |
| 424 | AUTOLOG | Unknown | Access Control | EGRESS DENIED |
| 425 | AUTOLOG | User | Access Control | EGRESS GRANTED |
| 426 | OPEN | Zone | Access Control | ACCESS DOOR PROPPED OPEN |
| 427 | TRBL-SUP | Zone | Access Control | ACCESS POINT DSM TROUBLE |
| 428 | TRBL-SUP | Zone | Access Control | ACCESS POINT RTE TROUBLE |
| 429 | TECHNICIAN | User | Access Control | ACCESS PROGRAM MODE ENTRY |
| 430 | TECHNICIAN | User | Access Control | ACCESS PROGRAM MODE EXIT |
| 431 | AUTOLOG | Unknown | Access Control | ACCESS THREAT LEVEL CHANGE |
| 432 | TRBL-SUP | Zone | Access Control | ACCESS RELAY/TRIGGER FAIL |
| 433 | AUTOLOG | Zone | Access Control | ACCESS RTE SHUNT |
| 434 | AUTOLOG | Zone | Access Control | ACCESS DSM SHUNT |
| 440 | CLOSE | Unknown | Test/Misc. | PARTIAL CLOSE |
| 441 | OPEN | User | Open/Close | STAY MODE |
| 442 | CLOSE | Unknown | Open/Close | KEYSWITCH ARMED STAY |
| 450 | OPEN | User | Open/Close | - |
| 451 | OPEN | User | Open/Close | EARLY |
| 452 | OPEN | User | Open/Close | LATE |
| 453 | OPEN | User | Open/Close | Auto Disarm |
| 454 | TECHNICIAN | User | Open/Close | FAIL TO CLOSE |
| 455 | TECHNICIAN | Unknown | Open/Close | AUTO ARM FAIL |
| 456 | CLOSE | User | Open/Close | PARTIAL ARM |
| 457 | CLOSE | User | Open/Close | User Exit Error |
| 458 | ABORT | User | Open/Close | - |
| 459 | CLOSE | User | Open/Close | RECENT CLOSE |
| 460 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 461 | AUTOLOG | Unknown | Open/Close | WRONG CODE ENTRY |
| 462 | AUTOLOG | User | Open/Close | LEGAL CODE ENTRY |
| 463 | AUTOLOG | User | Open/Close | RE-ARM AFTER ALARM |
| 464 | AUTOLOG | User | Open/Close | AUTO ARM TIME EXTENDED |
| 465 | AUTOLOG | Unknown | Open/Close | PANIC ALARM RESET |
| 470 | CLOSE | User | Open/Close | PARTIAL CLOSE |
| 474 | OPEN | Unknown | KEY SWITCH | - |
| 481 | OPEN | User | - | - |
| 482 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 491 | CLOSE | User | - | - |
| 4B1 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 4B9 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 4C1 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 500 | TECHNICIAN | Unknown | SYSTEM DISABLED | - |
| 501 | TECHNICIAN | Zone | System Disables | ACCESS READER DISABLE |
| 510 | TECHNICIAN | Unknown | SYSTEM DISABLED | - |
| 520 | BYPASS | Zone | Sounder/Relay Disables | SOUNDER/RELAY DISABLE |
| 521 | BYPASS | Unknown | Sounder/Relay Disables | BELL 1 DISABLE |
| 522 | BYPASS | Unknown | Sounder/Relay Disables | BELL 2 DISABLE |
| 523 | BYPASS | Unknown | Sounder/Relay Disables | ALRM RELAY DISABLE |
| 524 | BYPASS | Unknown | Sounder/Relay Disables | TRBL RELAY DISABLE |
| 525 | BYPASS | Unknown | Sounder/Relay Disables | RVRSNG RELAY DISABLE |
| 526 | TROUBLE | Unknown | Sounder/Relay Disables | NOTIFICATION APPLIANCE CKT #3 |
| 527 | TROUBLE | Unknown | Sounder/Relay Disable | sNOTIFICATION APPLIANCE CKT #4 |
| 531 | TECHNICIAN | Unknown | System Peripheral Disables | MODULE ADDED |
| 532 | TECHNICIAN | Unknown | System Peripheral Disables | MODULE REMOVED |
| 551 | BYPASS | Unknown | Communication Disables | DIALER DISABLE |
| 552 | BYPASS | Unknown | Communication Disables | RADIO XMIT DISABLE |
| 553 | TECHNICIAN | Unknown | Communication Disables | REMOTE UPLOAD/DOWNLOAD |
| 570 | BYPASS | Zone | Bypasses | - |
| 571 | BYPASS | Zone | Bypasses | FIRE BYPASS |
| 572 | BYPASS | Zone | Bypasses | 24 HR ZONE BYPASS |
| 573 | BYPASS | Zone | Bypasses | BURG BYPASS |
| 574 | BYPASS | Zone | Bypasses | GROUP BYPASS |
| 575 | BYPASS | Zone | Bypasses | SWINGER BYPASS |
| 576 | AUTOLOG | Zone | Bypasses | ACCESS ZONE SHUNT |
| 577 | BYPASS | Zone | Bypasses | ACCESS POINT BYPASS |
| 600 | TECHNICIAN | Unknown | Test/Misc | .UNDEFINED DSC CONTACT ID CODE |
| 601 | TEST | Unknown | Test/Misc. | TEST MANUALLY TRIG |
| 602 | TEST | Unknown | Test/Misc. | PERIODIC TEST |
| 603 | TEST | Line | Test/Misc. | PERIODIC RADIO TEST |
| 604 | TEST | Unknown | Test/Misc. | FIRE DRILL |
| 605 | TECHNICIAN | Unknown | Test/Misc. | STATUS REPORT |
| 606 | AUTOLOG | Unknown | Test/Misc. | LISTEN IN ACTIVE |
| 607 | TEST | Unknown | Test/Misc. | WALK TEST MODE |
| 608 | TECHNICIAN | Unknown | Test/Misc. | Abnormal Test |
| 609 | AUTOLOG | Unknown | Test/Misc. | VIDEO XMTR ACTIVE |
| 60B | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 610 | TEST | Unknown | Test/Misc. | TEST |
| 611 | AUTOLOG | Zone | Test/Misc. | POINT TESTED OK |
| 612 | AUTOLOG | Zone | Test/Misc. | POINT NOT TESTED |
| 613 | AUTOLOG | Zone | Test/Misc. | INTRUSION ZONE WALK TESTED |
| 614 | AUTOLOG | Zone | Test/Misc. | FIRE ZONE WALK TESTED |
| 615 | AUTOLOG | Zone | Test/Misc. | PANIC ZONE WALK TESTED |
| 616 | TROUBLE | Unknown | Test/Misc. | SERVICE REQUEST |
| 621 | AUTOLOG | Unknown | Event Log | EVENT LOG RESET |
| 622 | AUTOLOG | Unknown | Event Log | EVENT LOG 50% FULL |
| 623 | AUTOLOG | Unknown | Event Log | EVENT LOG 90% FULL |
| 624 | AUTOLOG | Unknown | Event Log | EVENT LOG OVERFLOW |
| 625 | AUTOLOG | Unknown | Event Log | TIME/DATE RESET |
| 626 | AUTOLOG | Unknown | Event Log | TIME/DATE WRONG |
| 627 | AUTOLOG | Unknown | Event Log | ENTER PROGRAM MODE |
| 628 | AUTOLOG | Unknown | Event Log | EXIT PROGRAM MODE |
| 629 | TECHNICIAN | Unknown | Event Log | 1-1/3 DAY NO EVENT |
| 630 | AUTOLOG | Unknown | Scheduling | SCHEDULE CHANGE |
| 631 | AUTOLOG | Unknown | Scheduling | EXCEPTION SCHED. CHANGE |
| 632 | AUTOLOG | Unknown | Scheduling | ACCESS SCHEDULE CHANGE |
| 634 | TEST | Unknown | Test/Misc. | TEST |
| 641 | TROUBLE | Unknown | Personnel Monitoring | SENIOR WATCH TROUBLE |
| 642 | AUTOLOG | User | Personnel Monitoring | LATCH-KEY SUPERVISION |
| 654 | TECHNICIAN | Zone | Test/Misc. | No activity |
| 655 | TEST | Unknown | Test/Misc. | - |
| 667 | TEST | Unknown | Test/Misc. | - |
| 680 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 692 | TEST | Unknown | Test/Misc. | - |
| 698 | TEST | Unknown | Test/Misc. | - |
| 699 | TEST | Unknown | Test/Misc. | - |
| 6E5 | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 6EE | TECHNICIAN | Unknown | Test/Misc. | UNDEFINED DSC CONTACT ID CODE |
| 777 | BURG | Zone | Burglar Alarms | Burg – Crash and Smash |
| 900 | TEST | Unknown | Test/Misc. | Test |
| 912 | RESTORE | Unknown | Special Codes | FIRE ALARM SILENCE |
| 995 | AUTOLOG | Zone | NON-CRITICAL RECEIVER MESSAGE | - |
| 996 | TECHNICIAN | Zone | System Troubles | DISK SPACE LOW |
| 997 | TECHNICIAN | Zone | System Troubles | RECEIVER MESSAGE |
| 998 | TECHNICIAN | Zone | System Troubles | UNKNOWN SIGNAL |
| 999 | TECHNICIAN | Zone | General Alarms | - |