Skip to main content

Navtelekom - SIGNAL S-2551 Protocol

This page describes the public protocol context for using the Navtelekom SIGNAL S-2551 tracker with Plaspy. It focuses on how the device communicates with Plaspy servers, the role of the reporting protocol in delivering GPS position and telemetry, and practical compatibility considerations for deployment. The goal is to give technical integrators and fleet teams a clear, non-sensitive overview of how the tracker and Plaspy interact.

Plaspy uses shared connection settings across supported devices and automatically detects the tracker protocol when a device reports to the platform. The SIGNAL S-2551 supports EGTS and FLEX FLEX 2.0 protocols and can transmit via cellular TCP or UDP. Exact protocol behavior can vary by firmware version, hardware revision, and manufacturer implementation, so always validate device-specific details with Navtelekom documentation.

Protocol Overview​

The protocol used by the SIGNAL S-2551 defines how GNSS position, I/O states, CAN telemetry, and event notifications are encoded and sent from the tracker to a server. For Plaspy integration, the protocol enables reliable delivery of location and telemetry so the platform can ingest, index, and present actionable data to users.

  • Enables transmission of GNSS position and time stamped telemetry for real time tracking in Plaspy.
  • Carries I/O and sensor data such as analog inputs, discrete inputs, CAN J1939 parameters, and accelerometer events.
  • Supports industry protocols used by the device including EGTS and FLEX FLEX 2.0 as public manufacturer features.
  • Allows the tracker to identify itself and provide device identifiers required for correct ingestion by Plaspy.
  • Supports multi server reporting so the device can push telemetry to redundant endpoints when configured.

How Plaspy Detects the Protocol​

Plaspy receives incoming telemetry on a single, shared endpoint and port and applies automated detection to determine the tracker protocol. When a SIGNAL S-2551 is configured correctly to report to Plaspy, the platform typically does not require manual protocol selection from the user.

  • Plaspy listens on domain d.plaspy.com and on IP 54.85.159.138 for device connections.
  • All devices supported by Plaspy use the same port 8888 which simplifies device configuration.
  • Plaspy supports both TCP and UDP transport and will accept tracker reports sent to port 8888.
  • When the tracker sends data to the Plaspy endpoint, the platform automatically detects the protocol and routes telemetry for processing.
  • Proper device identification and server addressing on the tracker are the main requirements for automatic detection to succeed.

Transport and Connection Context​

Connection details determine how the SIGNAL S-2551 reaches the Plaspy endpoint but do not change the public role of the protocol in reporting telemetry. The device supports TCP and UDP transport over cellular GPRS and can be pointed at a domain or an IP address for server delivery.

  • The SIGNAL S-2551 can be configured to use UDP or TCP transport on port 8888 depending on device settings and network reliability requirements.
  • Devices may be pointed to the Plaspy server using the domain d.plaspy.com or directly to IP 54.85.159.138.
  • Plaspy uses the same port 8888 for all supported devices which simplifies configuration for mixed fleets.
  • The device is capable of reporting to multiple servers simultaneously for redundancy; ensure secondary servers are reachable and correctly configured.
  • Consider network characteristics such as carrier NAT and firewall rules when choosing TCP or UDP for your deployment.

Protocol Compatibility Notes​

  • Firmware revisions can change supported fields, optional telemetry channels, and behavior for EGTS or FLEX type messages; verify firmware release notes.
  • Hardware revisions and optional modules such as Bluetooth or external GNSS antennas may affect which telemetry channels are available.
  • Transport choice TCP versus UDP can affect delivery semantics and may interact with how the device retries or buffers messages.
  • Multi server reporting is supported by the device but requires correct per server configuration and awareness of which server is primary for Plaspy ingestion.
  • Manufacturer settings for identifiers, APN, and reporting intervals must be set correctly so Plaspy can match device IDs to accounts.
  • Always validate compatibility against Navtelekom documentation and any release notes for the SIGNAL S-2551 model.

Why Protocol Understanding Matters​

Understanding the device communication protocol helps ensure a reliable integration with Plaspy, reduces troubleshooting time, and improves long term operational stability for fleet deployments.

  • Ensures correct mapping of device identifiers so Plaspy recognizes incoming telemetry and associates it with the intended asset.
  • Helps select appropriate transport settings and reporting intervals to balance data freshness and cellular usage.
  • Aids troubleshooting of missing telemetry, by confirming server address, transport type, and expected event types are configured on the tracker.
  • Improves configuration of sensor and CAN channel mappings so telemetry fields in Plaspy reflect real world inputs.
  • Informs firmware update and hardware revision planning so deployments remain supported and predictable.

Why Use Plaspy with This Protocol​

Using the SIGNAL S-2551 with Plaspy gives organizations a practical path to leverage the tracker’s robust hardware, multiple telemetry channels, and multi server reporting for operational visibility. Plaspy ingests GNSS positions, CAN J1939 parameters, sensor I/O, and accelerometer events to provide real time monitoring, historical playback, and rule based alerts that support fleet management and security workflows.

To learn more about how Plaspy handles device integrations and to review platform features, visit https://www.plaspy.com. For the most current device specific protocol details, firmware notes, and implementation guides consult the manufacturer at https://www.navtelecom.ru/ since protocol support and firmware behavior can change over time and should be verified against official Navtelekom documentation.

Tracker Communication

Looking for a platform that works with compatible protocols

Plaspy helps receive data from supported trackers and organize monitoring, visibility, and reporting in one place.

Learn more about Plaspy