eChat PoC Solution
Caltta eChat is an advanced PoC (Push-to-Talk over Cellular) platform that leverages carrier 3G/4G/5G/Wi-Fi infrastructure to deliver wide coverage and unlimited channels, freeing customers from the small coverage and limited capacity of traditional PTT networks. eChat achieves protocol-level interconnection with Caltta DMR systems, enabling unified voice, SMS and location dispatch to DMR without any back-to-back gateway.
With no dedicated frequency and no private network required, it enables nationwide and cross-border instant voice, location sharing, video transmission and dispatch management — fast to deploy, low investment, easy to maintain — ideal for enterprises, industry customers and temporary event networks.
Platform Editions
The eChat platform adopts a modular, stackable design for on-demand selection and smooth expansion:
eChat 2K Plus
- 1 server / 1 fixed IP
- Up to 2,000 users
- Up to 8 video streamings
- Voice / location / message / video / storage
eChat 5K / 5K Plus
- 1–2 servers / 1–2 fixed IPs
- Up to 5,000 users
- Up to 50 video streamings (5K Plus)
- Geo-redundancy, service continuity
eChat Pro
- 5+ servers / 5+ fixed IPs
- Up to 10,000+ users
- Up to 100+ video streamings (720P)
- Carrier-grade capacity
Core Advantages
Secure & Reliable
- Geo-redundancy, modular stackable design
- Private control signalling + triple authentication (IMEI/ICCID/account)
- End-to-end voice encryption
- Emergency alarm, geofence, lone worker protection
Full Interworking with DMR
- Protocol-level voice/SMS/location interworking
- No back-to-back gateway needed
- Unified command & dispatch
- Public-private collaborative coverage
Abundant Services
- Voice: group/private/emergency/dynamic regroup
- Location: track playback/geofence/circle-selection call
- Video: pull/push/forwarding/snapshot
- Message: SMS/MMS/picture/file/broadcast
Terminals
PoC Radios
- G280
LTE PoC radio, 1.75-inch color LCD, RTOS fast startup, IP54 - e600 / e690
LTE/WCDMA/GSM/Wi-Fi, 5100mAh large battery, IP68 - e720
4.7-inch HD full touch screen, 13MP dual cameras, 8-core CPU, IP68 - NH900S
DMR + public 5G/LTE dual-mode, 50MP camera, VoNR/VoLTE
Dispatch & Management
- Dispatch Console
Voice dispatch, location service, video dispatch, message service - Management Console
Multi-level agent/fleet/group/account management - Vehicle Solutions
Various vehicle-mounted terminals, 6W speaker, noise cancellation - Storage Server
Unified A/V recording storage and playback
Benchmark Cases
Ethiopia Telecom Operator Network
The first overseas private-network operator with 20,000+ online users, interworking with the existing GoTa system, widely applied in transport, construction, retail and hotel.
G20 Bali Summit Communications
The eChat 5K Plus solution provided unified voice/video dispatch and map-based dispatch, guaranteeing real-time, accurate communications for the Ministry of Transportation at the 17th G20 Summit.
Hunan Expressway Full Coverage
Cost-effective seamless coverage along 5,493 km of expressway, ensuring smooth communication between frontline police and the dispatch center, with rich PTT, dispatch and messaging services.
Airport / Taxi Industry Applications
Replacing legacy 400M analog systems, delivering PTT voice, location, video and multimedia dispatch — significantly improving safety and efficiency with minimal investment.
Typical Application Scenarios
Public Safety & Emergency
Transportation / Logistics
Construction / Mining
Hotel / Catering
Retail / Warehousing
Major Events / Sports
