This IP PBX series allows businesses to unify multiple communication technologies, such as voice, video calling, video conferencing, video surveillance, data tools, mobility options and facility access management onto one common network.

Category: IPPBX


  • UCM6204 support up to 500 users and 50/75 concurrent calls
  • Auto Discovery and Zero Configuration of Grandstream SIP endpoints
  • Integrated 2/4/8 PSTN trunk FXO ports, 2 analog telephone FXS ports with lifeline capability and up to 50 SIP trunk accounts
  • Gigabit network ports with Integrates PoE, USB, SD card
  • Supports up to a 5-level IVR (Interactive Voice Response)
  • Built-in call recordings server; recordings accessible via web user interface
  • Built-in Call Detail Records (CDR) for tracking phone usage by line, date, etc.
  • Supports multi-language auto-attendant and call queue to efficiently handle incoming calls


Voice-over-Packet Capabilities

LEC with NLP Packetized Voice Protocol Unit, 128ms-tail-length carrier grade Line Echo Cancel-

lation,Dynamic Jitter Buffer, Modem detection & auto-switch to G.711

Voice and Fax Codecs

G.711 A-law/U-law, G.722, G.723.1 5.3K/6.3K, G.726, G.729A/B, iLBC, GSM, AAL2-G.726-32,


Video Codecs

H.264, H.263, H263+


Layer 3 QoS, Layer 2 QoS

DTMF Methods

In Audio, RFC2833, and SIP INFO

Provisioning Protocol &


TFTP/HTTP/HTTPS, auto-discovery & auto-provisioning of Grandstream IP endpoints via Zero- Config (DHCP Option 66 multicast SIP SUBSCRIBE mDNS), eventlist between local and remote trunk

Network Protocols


Disconnect Methods

Call Progress Tone, Polarity Reversal, Hook Flash Timing, Loop Current Disconnect, Busy Tone

Media Encryption


Universal Power Supply

Output: 12VDC, 1.5A; Input: 100 ~ 240VAC, 50 ~ 60Hz


UCM6202/6204: 226mm L x 155mm W x 34.5mm H UCM6208: 440mm L x 185mm W x 44mm H


UCM6202/6204: Unit weight 0.51kg, Package weight 0.94kg UCM6208: Unit weight 2.23kg, Package weight 3.09kg


Operating: 32 ~ 104ºF / 0 ~ 40ºC, 10 ~ 90% (non-condensing); Storage: 14 ~ 140ºF / -10 ~ 60ºC


Wall mount & Desktop (UCM6202/6204); Rack mount & Desktop (UCM6208)


Multi-Language Support

English/Simplified Chinese/Traditional Chinese/Spanish/French/Portuguese/German/Russian/ Italian/Polish/Czech for Web UI; Customizable IVR/voice prompts for English, Chinese, British English, German, Spanish, Greek, French, Italian, Dutch, Polish, Portuguese, Russian, Swedish, Turkish, Hebrew, Arabic; Customizable language pack to support any other languages

Caller ID

Bellcore/Telcordia, ETSI-FSK, ETSI-DTMF, SIN 227 – BT

Polarity Reversal/Wink

Yes, with enable/disable option upon call establishment and termination

Call Center

Multiple configurable call queues, automatic call distribution (ACD) based on agent skills/avai- lability/busy level, in-queue announcement

Customizable Auto Attendant

Up to 5 layers of IVR (Interactive Voice Response)


Maximum Call Capacity

-Registered SIP devices: supports up to 800 registered SIP devices/users (for UCM6208) and 500 registered SIP devices/users (for UCM6202/6204)

-Concurrent SIP calls: Up to 30 (UCM6202), 45 (UCM6204), or 100 (UCM6208), or 66% performance if calls are SRTP encrypted

Conference Bridges

Up to 3 (UCM6202/6204) or 6 (UCM6208) password-protected conference bridges allowing up to 25 (UCM6202/6204) or 32 (UCM6208) simultaneous PSTN or IP participants

Call Features

Call park, call forward, call transfer, DND, ring/hunt group, paging/intercom etc.



FCC: Part 15 (CFR 47) Class B, Part 68

CE: EN55022 Class B, EN55024, EN61000-3-2, EN61000-3-3, EN60950-1, TBR21, RoHS A-TICK: AS/NZS CISPR 22 Class B, AS/NZS CISPR 24, AS/NZS 60950, AS/ACIF S002

ITU-T K.21 (Basic Level); UL 60950 (power adapter)