Capacity & Telephony:
Users: Supports up to 500 users
Concurrent Calls: Handles up to 45 concurrent calls
FXO Ports: 4 RJ11 ports for analog PSTN lines
FXS Ports: 2 RJ11 ports for analog phones or fax machines with lifeline support

Network & Connectivity:
Network Ports: Dual Gigabit RJ45 ports with integrated PoE+ support
USB & Storage:
1 USB port
1 SD card slot for call recording and backups

Processor & Memory:
Dual-core 1GHz processor
1GB RAM
4GB flash memory

Audio & Video Codecs:
Audio Codecs: G.711 (μ-law/a-law), G.722, G.723.1, G.726, G.729A/B, iLBC, Opus
Video Codecs: H.264, H.263, H.263+
Additional Features: Echo cancellation, adaptive jitter buffer, fax over IP (T.38)

Security & Management:
Security Protocols: SRTP, TLS, HTTPS, SSH
Provisioning: Zero Configuration for Grandstream SIP endpoints
Remote Management: Web-based interface with support for multiple languages

PBX Features:
IVR (Auto Attendant): Supports up to 5 levels
Conference Bridges: Up to 3 bridges with 25 participants each
Call Recording: Built-in server with web access
Call Detail Records (CDR): Tracks phone usage by line, date, etc.

Voicemail & Fax to Email: Supported
Call Queue Management: Efficient handling of incoming calls

Physical & Environmental:
Dimensions: 226 x 155 x 34.5 mm
Weight: Approximately 0.51 kg
Mounting Options: Desktop or wall-mountable
Power Supply: 12V/1.5A DC adapter or via PoE+