We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular black metal box with front port array

Grandstream

Grandstream UCM6304A 4 FXO 4 FXS IP-PBX conferencing device

SKU CH-R0ST-7S23B MPN UCM6304A

IP-PBX supporting 1000 users and 120 concurrent calls with four FXO and four FXS ports for analogue line and handset connectivity

  • Supports up to 1000 users and 120 concurrent calls
  • Zero-configuration provisioning for Grandstream SIP endpoints
  • Built-in instant messaging, audio conferencing and web meetings platform
  • Free Wave App for voice and IM on desktop, web and mobile
  • Three Gigabit RJ45 ports with integrated PoE+ and NAT router support

Scalable IP-PBX for up to 1000 users

The Grandstream UCM6304A delivers an on-premise unified communications platform that supports up to 1000 users and 120 concurrent calls. It unifies voice, instant messaging, audio conferencing and web meetings in a single appliance. Zero-configuration provisioning works with Grandstream SIP endpoints. The system is built for organisations that want full control over their communications infrastructure.

Four FXO and four FXS ports with PoE+

Four FXO ports connect the PBX to the public switched telephone network, while four FXS ports attach analogue phones or fax machines directly. Three Gigabit RJ45 ports provide LAN, WAN and integrated PoE+ for powering endpoints. Automated NAT traversal and the UCM RemoteConnect cloud service enable secure remote access for hybrid workforces. An open API allows integration with CRM and PMS platforms.

Handles 120 simultaneous calls.

The appliance comfortably manages 120 concurrent calls and up to 1000 registered users for daily voice, IM and audio meeting workloads. The supplier notes a 1500-user ceiling for the broader series, but this model is rated for 1000. Organisations needing more simultaneous sessions or analogue line interfaces would need additional hardware. Buyers who require video conferencing or higher port density should look elsewhere.

How it compares

Measured against everything we stock in Conference Phones & Meeting Devices, at today’s prices. Recalculated every night.

Price $623.99
Pricier than about 62% of the 512 comparable items (median $362.49).

Specifications

Size & build
Shipping weight2.50 kg
Package size485 × 187 × 49 mm

Questions about this item

How often will the 4 FXO and 4 FXS ports need maintenance?

The analogue FXO and FXS ports have no scheduled maintenance; they operate passively until a line or handset fails, at which point the individual port module can be replaced without touching the rest of the system.

What limit appears first when the UCM6304A runs at full load all day?

The platform caps at 120 concurrent calls, so sustained heavy traffic will hit that call ceiling before CPU or memory becomes a bottleneck.

How much heat and fan noise does the unit produce during continuous operation?

With three Gigabit RJ45 ports and integrated PoE+ the chassis stays cool enough for fanless operation, so there is no audible fan noise and only modest warmth at the vents.

More in Conference Phones & Meeting Devices

Similar items