Class · Personal
Personal Node
Portable LoRa/GPS device for each team member.
LoRa 868GPSBLE 5USB-C5+ days
AlterLink · LoRa + GPS + LTE
Private resilient communication when networks fail.
AlterLink connects teams through LoRa, GPS and mobile internet, showing people, markers and alerts on a private live map.
15+ kmLoRa range (LoS)
5+ daysbattery per node
AES-256encrypted groups
The problem
Networks fail. Operations continue.
Mobile networks are not always available. Remote areas, overloaded infrastructure, disasters, field operations and industrial sites require a backup communication layer that is private, lightweight and independent.
01 · COVERAGE
No signal at all
Mountain valleys, forests, tunnels and remote sites sit far beyond the reach of the nearest cell tower.
02 · CAPACITY
Overloaded networks
During disasters and mass events, cellular networks saturate exactly when coordination matters most.
03 · DEPENDENCY
Fragile infrastructure
Power cuts, damaged equipment and single points of failure can silence communication across an entire region.
04 · PRIVACY
Exposed coordination
Sensitive field operations should not depend on — or be visible to — public network infrastructure.
The system
One private communication layer
AlterLink combines LoRa, GPS, GSM and custom protocol logic into one private communication layer. Everything works offline first — and synchronizes when connectivity returns.
LoRa Mesh
Long-range low-bandwidth communication between portable nodes.
GPS Tracking
See team members and last known positions on a private map.
Hybrid Transport
Use GSM/Internet when available and fall back to LoRa when needed.
Private Groups
Encrypted group-based communication with controlled access.
Map Markers
Place alerts, routes, resources and help requests directly on the map.
SOS Priority
Emergency packets are prioritized across every available channel.
Architecture
From pocket to cloud — one event model
Positions, markers, messages and alerts travel as the same compact events across every layer of the system.
Phone App
Map · Chat · SOSBLE
Portable Node
LoRa · GPS · BLELoRa 868
LoRa Mesh
Multi-hop relayLoRa
Gateway
Vehicle · BaseLTE · IP
Cloud Backend
Optional syncAPPMobile App
Map, markers, team status and communication controls.
NODEPortable Node
Compact LoRa/GPS/BLE device for each team member.
GATEWAYVehicle Gateway
High-power mobile gateway with LoRa, LTE, GPS and external antennas.
RELAYRelay Node
Coverage extension through stationary or mobile relay points.
BACKENDBackend
Optional synchronization, group management and history when internet is available.
Key features
Everything a field team needs
Designed around one constraint: it has to keep working when everything else doesn't.
Offline-ready maps
Tiles, markers and tracks are cached on device — no connection required.
LoRa/GSM hybrid communication
Transports switch automatically; the team never has to think about it.
GPS position sharing
Configurable beacon intervals — from live tracking to power-saving check-ins.
Custom map markers
Alerts, routes, resources and assembly points, visible to the whole group.
SOS and help requests
One action raises the alarm on every channel — with position attached.
Private encrypted groups
Isolated group keys — only your team can read your traffic.
Portable and vehicle nodes
Hardware classes for people, vehicles and fixed positions.
Store-and-forward messaging
Nodes hold messages for peers that are temporarily out of reach.
Low-power operation modes
Adaptive duty cycling for multi-day operation on a single charge.
Custom binary protocol
Every byte counts on LoRa — frames are packed, deduplicated and encrypted.
Use cases
Built for teams that work beyond coverage
Search & Rescue
Track teams across terrain with no coverage and mark findings in real time.
Expeditions
Keep basecamp and route teams connected far beyond the last cell tower.
Remote Infrastructure
Pipelines, power lines and stations inspected by crews that stay reachable.
Industrial Sites
Coordination across plants, mines and construction sites where concrete and steel block signal.
Security Teams
Private coordination and positioning without exposing traffic to public networks.
Disaster Response
A communication layer that keeps working while infrastructure is being restored.
Mountain & Rural Operations
Reliable links across valleys and ridgelines with relay nodes on high ground.
Emergency Backup Communication
A dormant, independent channel that activates the moment primary networks fail.
Hardware
Three node classes, one network
Every device speaks the same protocol and joins the same private mesh.
Class · Vehicle
Vehicle Node
High-power gateway with LTE, GPS, LoRa and Wi‑Fi.
LoRa HPLTEGPSWi‑Fi9–30 V
Class · Relay
Relay Node
Stationary or mobile relay for extending network coverage.
LoRaSolar + batteryIP67Mast mount
Protocol
Built for low-bandwidth reliability.
AlterLink uses compact encrypted packets designed for LoRa constraints: GPS positions, markers, SOS, acknowledgements and status updates. The same event model can travel over LoRa, GSM or backend synchronization.
BIN
Binary packet format
Fixed compact frames tuned to LoRa airtime budgets.
SOS
Prioritized SOS traffic
Emergency frames preempt queues on every transport.
S&F
Store-and-forward delivery
Messages persist until the recipient is reachable.
DEDUP
Duplicate protection
Sequence-based deduplication keeps the mesh quiet and consistent.
AES
Encrypted payloads
Authenticated encryption with per-group keys.
EVENT
One packet model
Identical events over LoRa, GSM and backend sync.
ALTERLINK FRAME · 40 BFITS ONE LORA TX
2 BPRE
1 BTYPE
4 BGROUP
2 BSRC
2 BSEQ
1 BTTL
≤ 24 B · ENCRYPTEDPAYLOAD
4 BMAC
A full position report — node, coordinates, altitude, status — fits in a single frame. Event types include POS, MARKER, MSG, SOS, ACK and STATUS.
Get started
Build your own private communication layer.
AlterLink is designed for teams that need visibility, coordination and communication beyond normal network coverage.
Contact AlterLink