| Supported Users | Up to 250 SIP users |
| Maximum Concurrent Calls | Up to 50 concurrent calls (G.711) and 50 concurrent SRTP encrypted calls |
| Conference Capacity | 3 audio conference bridges supporting up to 50 participants |
| Analog FXS Ports | None |
| PSTN FXO Ports | None |
| Network Interfaces | Three self-adaptive Gigabit Ethernet ports (Switched, Routed or Dual Mode) with integrated PoE+ |
| Integrated NAT Router | Yes (Supports Router Mode and Switch Mode) |
| Peripheral Interfaces | 1 Ă— USB 3.0 Port, 1 Ă— SD Card Slot |
| Display | 320 Ă— 240 Color LCD Touchscreen with shortcut keys and scroll bar |
| Reset Button | Factory Reset (Long Press) / Reboot (Short Press) |
| Telephony Platform | Powered by Asterisk® Version 16 Open Source Telephony Platform |
| Voice Processing | Carrier-grade Line Echo Cancellation (LEC), Dynamic Jitter Buffer, NetEQ, FEC 2.0, Modem Detection, Jitter Resilience up to 50% Packet Loss |
| Supported Voice & Fax Codecs | Opus, G.711 A-law/U-law, G.722, G.722.1, G.722.1C, G.723.1, G.726-32, G.729A/B, iLBC, GSM, T.38 Fax-over-IP |
| DTMF Support | In-band Audio, RFC4733, SIP INFO |
| Quality of Service (QoS) | Layer 2 QoS (802.1Q, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS) |
| API Integration | Full API support for CRM, PMS, ERP, Helpdesk, and third-party business applications |
| Provisioning | AES-encrypted XML provisioning, Zero Configuration Provisioning, DHCP Option 66, Multicast SIP SUBSCRIBE, mDNS, Auto Discovery |
| Supported Network Protocols | TCP, UDP, IP, RTP, RTCP, ICMP, ARP, DNS, DDNS, DHCP, NTP, TFTP, SSH, HTTP, HTTPS, PPPoE, STUN, SRTP, TLS, LDAP, IPv6, OpenVPN® |
| Media Security | SRTP, TLS, HTTPS, SSH, IEEE 802.1X Authentication |
| Firewall & Security | Integrated NAT Firewall, Secure Boot, Fail2Ban Protection, Random Default Passwords, TLS Encryption |
| Remote Connectivity | Secure Remote Access using Grandstream UCM RemoteConnect |
| Call Center Features | Multiple Call Queues, Skills-Based Routing, Automatic Call Distribution (ACD), In-Queue Announcements |
| Auto Attendant (IVR) | Fully Customizable Multi-language IVR with up to 5 Levels |
| Wave App Support | Free Grandstream Wave App for Windows, macOS, Web, Android & iOS supporting Voice Calls, Instant Messaging, and Meetings |
| Call Features | Call Transfer, Call Forwarding, Call Waiting, Call Recording, Caller ID, Call History, IVR, DID, DOD, Ring Groups, Paging, Intercom, Voicemail, Voicemail-to-Email, Fax-to-Email, BLF, SCA, Speed Dial, Call Queues, Pickup Groups, Music on Hold, Emergency Calling, Follow Me, Blacklist/Whitelist, Voice Meetings, Busy Camp-On, Dial by Name, Feature Codes, Event Lists and more |
| Disconnect Methods | Busy Tone, Congestion Tone, Polarity Reversal, Hook Flash Timing, Loop Current Disconnect |
| Caller ID Standards | Bellcore/Telcordia, ETSI-FSK, ETSI-DTMF, SIN 227 (BT), NTT |
| Power Supply | Input: 100–240V AC, 50/60Hz; Output: 12V DC, 1.5A |
| Dimensions | 270 Ă— 175 Ă— 36 mm |
| Weight | Unit: 705 g • Package: 1,131 g |
| Operating Temperature | 0°C to 45°C |
| Storage Temperature | -10°C to 60°C |
| Operating Humidity | 10% to 90% (Non-Condensing) |
| Mounting Options | Desktop or Wall Mount Installation |
| Multi-language Support | Web Interface available in multiple languages including English, Chinese, Spanish, French, German, Portuguese, Italian, Russian, Polish, Czech, Turkish and more. Customizable IVR supports multiple international languages. |
| Firmware Management | Centralized firmware provisioning, monitoring, and upgrades via Grandstream Device Management System (GDMS) |
| Compliance & Certifications | FCC, CE, IC, RCM, UL, RoHS |
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