Retransmission - retransmission of telecommunication packets that have been damaged or lost. This is the basic mechanism used by communication protocols to ensure reliable communication. Protocols that ensure reliable communication in such networks use retransmission of missing and/or damaged packets to ensure reliability.

ActiveView can retransmit events and alarms using the Surguard protocol. Surguard messages are sent through a dedicated device. Client software which understands the Surguard protocol should be connected to the device. If you want to start using this functionality, contact your ActiveView administrator. Retransmission can be enabled for devices ex20.

Retransmission configuration allows you to set parameters used in Surguard messages. To open it, select Administration → Retransmission from the main menu.

Retransmission configuration panel contains the following elements:

• Retransmission enabled – decides if retransmission is on or off.
• Receiver number – a four-digit number. A constant part of every Surguard message (see below).
• Device number – serial number of the device used by ActiveView to send Surguard messages (read only, defined by the administrator).
• Device type – type of the device used by ActiveView to send Surguard messages (read only, defined by the administrator).
• events/alarms list – a list containing all possible events and alarms. It comprises the following columns:
  • Name – event/alarm name.
  • Qualifier - event/alarm retransmission qualifier (for usage see below).
  • Code – event/alarm retransmission code (for usage see below).
  • Zone – zone assigned to event/alarm (for usage see below).
  • Enabled – if ticked the event/alarm is retransmitted.

Surguard (Contact ID) messages sent by ActiveView have the following form:

5RRLLs18AAAAQXXXYYZZZ

The RRLL part is event/alarm-independent. It is the receiver number set in the retransmission configuration.

The meanings of other parts depend on the type of the event/alarm:

• patrol start/end:
  • AAAA – retransmission code of the site
  • QXXX – qualifier and code of the event (see above)
  • YYZZZ – retransmission code of the route
• checkpoint passed:
  • AAAA – retransmission code of the site
  • QXXX – qualifier and code of the event (see above)
  • YYZZZ – retransmission code of the checkpoint
• patrol failed, simple route:
  • AAAA – retransmission code of the site
  • QXXX – qualifier and code of the alarm (see above)
  • YYZZZ – retransmission code of the route
• patrol failed, advanced route:
  • AAAA – retransmission code of the site
  • QXXX – qualifier and code of the alarm (see above)
  • YYZZZ – retransmission code of the route
• alarm/event from a device linked to a site:
  • AAAA – retransmission code of the site
  • QXXX – qualifier and code of the event/alarm (see above)
  • YYZZZ – retransmission code of the device
• alarm/event from a device not linked to a site:
  • AAAA – 4 last digits of retransmission code of the device
  • QXXX – qualifier and code of the event/alarm (see above)
  • YYZZZ – retransmission code of the device