Grandstream UCM6300A IP PBX (Audio Only)

The Grandstream UCM6300A IP PBX is a robust audio-only unified communications system designed for small to medium-sized businesses that require voice-centric collaboration. With support for up to 250 users and 50 concurrent calls, this system consolidates voice, instant messaging (IM), conferencing, mobility, and remote communication into a single secure platform. It features built-in IM and web conferencing tools, the Wave app for desktop and mobile collaboration, and seamless cloud connectivity through UCM RemoteConnect. As part of the UCM6300 Audio series, it eliminates per-seat licensing fees and provides centralized, reliable, and scalable communications, whether on-premise or via secure cloud access.

Product Features

Cost-effective unified communications
Eliminates monthly per-user license fees. A fully inclusive solution for voice, IM, and conferencing—ideal for SMBs seeking to reduce long-term communication costs.

Supports up to 250 users and 50 concurrent calls
Perfectly sized for growing teams, the system accommodates simultaneous SIP communication without compromising audio quality or system performance.

Built-in conferencing and collaboration tools
Includes integrated audio conferencing and instant messaging platforms, accessible across desktops, IP phones, and mobile devices. Offers internal team collaboration without the need for third-party services.

Wave app for desktop and mobile access
Users can connect remotely via the Wave application, enabling secure voice calls, messaging, and conferencing from Android, iOS, and web browsers.

Cloud management with GDMS and UCM RemoteConnect
Enables centralized provisioning, monitoring, and maintenance via Grandstream Device Management System (GDMS). UCM RemoteConnect ensures secure NAT traversal for remote users.

API integration with third-party platforms
Provides a full API for CRM, PMS, and custom platform integration, enhancing productivity and communication across your existing IT ecosystem.

Advanced network and voice security
Equipped with secure boot, TLS/SRTP encryption, and a unique device certificate to safeguard your calls, configurations, and communication data.

High reliability and redundancy
Supports hot standby high-availability, dual deployment modes, and local failover, ensuring continuous uptime even in the event of system failure.

Superior HD voice quality
Supports Full-Band Opus codec and includes jitter buffer, echo cancellation, and packet loss resilience up to 50%, delivering clear, uninterrupted conversations.

Product Specifications

• Supports up to 250 users and 50 concurrent calls
• Three auto-sensing Gigabit RJ45 network ports with PoE+
• Zero-config provisioning for Grandstream SIP devices
• Built-in IM, audio conferencing, and web meeting platform
• Wave app for Android, iOS, and web browsers
• Secure remote access via UCM RemoteConnect NAT traversal
• API support for third-party integrations (CRM, PMS, etc.)
• Compatible with GDMS cloud management system
• Audio codecs: Opus, G.711 A-law/U-law, G.722, G.726, G.729A/B, iLBC, GSM; T.38 for fax
• Media encryption: SRTP, TLS, HTTPS, SSH, 802.1X
• Supports jitter resilience up to 50% packet loss
• Telephony OS: Asterisk version 16
• Network protocols: TCP/IP, RTP, RTCP, ARP, DHCP, NTP, STUN, PPPoE, TLS, OpenVPN®, and more
• Advanced call features: IVR, call routing, call park, voicemail to email, paging, DND, fax to email, and more
• Firmware upgradeable via GDMS and local web UI
• Power: DC 12V, 1.5A; AC input 100–240V, 50/60Hz
• Dimensions: Approx. 270mm (L) x 175mm (W) x 36mm (H)
• Mounting options: Desktop or wall-mount
• Multi-language support: IVR prompts and web UI in multiple languages