Call Capacity & Telephony
Supports up to 500 SIP users
Up to 30 concurrent calls
2 FXO ports (for analog PSTN lines)
2 FXS ports (for analog phones or fax machines – with lifeline support during power loss)

Network & Connectivity:
2 Gigabit RJ45 ports, with PoE+ support (IEEE 802.3at)
Supports Router and Switch modes
USB port and SD card slot for backups and call recording
128×32 pixel LCD display with keypad navigation

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+
Supports features like Echo Cancellation (LEC), Adaptive Jitter Buffer, Voice Activity Detection

Security & Encryption:
Supports SRTP, TLS, HTTPS, SSH
Built-in firewall and fail2ban protection
Zero Configuration for auto-discovery of Grandstream IP phones

PBX Features:
Multi-level IVR (Auto Attendant) (up to 5 layers)
Call queues, ring groups, hunt groups
Call recording, CDR (Call Detail Records)
Voicemail to Email
Audio conference bridges (up to 3 rooms with 25 participants)
Fax over IP (T.38) + Web Fax + Fax-to-Email
Web GUI with multi-language support (including Arabic)

Physical & Environmental:
Dimensions: 226 x 155 x 34.5 mm
Weight: 0.51 kg (Net), ~0.94 kg (Gross)
Mounting options: desktop or wall-mountable
Power Supply: via PoE or 12V/1.5A DC adapter