ADD-UC924 HD colour SIP phone

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The ADDCOM UC900 series of IP phones offer a modern design, crystal-clear sound thanks to their Texas Instrument® chipset, a full set of advanced features and an industry leading 2 year warranty.

The ADD-UC924 is a reliable enterprise-grade colour IP phone that features four line keys, 28 feature keys and a 4.3” 480×320-pixel TFT-LCD screen.

The ADD-UC924 is optimised for executive use for major decision makers, administrative assistants and those working with bandwidth-intensive applications on grouped PCs and also supports up to fiveway conferencing. Up to 28 feature keys can be configured for IP PBX features including BLF, SCA, Intercom, Call Pickup, Call Park. The high-resolution TFT-LCD and HD Voice brings you a life-like visual and hearing experience.

Connect your favourite ADDCOM headset to the headset port and enjoy one touch switching between headset and handset.It is available to deploy with a wide range of hosted and on-premise IP PBX systems.


  • Phone Features
  • 4 VoIP accounts
  • Call hold, mute, DND
  • One-touch speed dial, hotline
  • Call forward, call waiting, call transfer
  • Redial, call return, auto answer, direct IP call,
  • 5-way conferencing
  • XML Browser, action URL/URI
  • Group listening, SMS, emergency call
  • Ring tone selection/provisioning
  • Set date time automatically or manually
  • Dial plan per account
  • RTCP-XR (RFC3611), VQ-RTCPXR (RFC6035)
  • Voice Codecs Features
  • HD voice: HD handset, HD speaker
  • Codecs: iLBC, G.722, G.711 (A/ μ)
  • GSM_FR, G.723, G.729AB, G.726-32
  • DTMF: In-band, RFC 2833, SIP INFO
  • Full-duplex hands-free speakerphone with Acoustic
  • Echo Cancellation, Voice Activity Detention, Acoustic
  • Gain Control, Comfort Noise Generation, Packet Loss
  • Concealment, Adaptive Jitter Buffer
  • Directory
  • Local phone book up to 1000 entries
  • XML/LDAP remote phone book
  • Intelligent search method
  • Phone book search/import/export
  • Call history: dialled/received/missed/forwarded
  • Black list
  • IP-PBX Features
  • Busy Lamp Field, Bridged Line Appearance
  • Anonymous call, anonymous call rejection
  • Message Waiting Indicator
  • Voice mail, intercom, paging
  • Call park, call pickup
  • Music on hold
  • Hot-desking
  • Management
  • Configuration: browser/LCD-Menu/auto-provision
  • Auto provision via HTTP/HTTPS FTP/TFTP
  • Auto-provision with PnP
  • Reset to factory, restart, reboot
  • Local tracing log export, system log
  • Phone lock for personal privacy protection
  • Feature keys
  • 8 line keys with LED
  • 8 line keys can be programmed up to
  • 28 various features (4-page view)
  • 8 features keys: voice mail, headset, speaker,hold, mute, transfer, call list, conference
  • 4 context-sensitive “soft” keys
  • 6 navigation keys, volume control keys
  • Illuminated speaker key/headset key /mute key
  • Display and Indicator
  • 5” 480 x 320 pixel colour display with backlight
  • 16 bit depth colour
  • LED for call and message waiting indication
  • Dual-colour (red or green) illuminated
  • LEDs for line status information
  • Intuitive user interface with icons and soft keys
  • Wallpaper, National language selection
  • Caller ID with name, number and photo
  • Interface
  • Dual-port Gigabit Ethernet
  • Power over Ethernet (IEEE 802.3af), class 3
  • 1xRJ9 (4P4C) handset port
  • 1xRJ9 (4P4C) headset port
  • Supports up to 6 Expansion Modules
  • Physical Features
  • Stand with 3 adjustable angles
  • Wall mountable
  • External universal AC adapter:
  • AC 100~240V input and DC 5V/1.2A output
  • Power consumption (PSU): 2.0~4.6W
  • Power consumption (PoE): 2.5~5.5W
  • Operating humidity: 10~95%
  • Operating temperature: -10~50°C
  • Network and Security
  • SIP v1 (RFC2543), v2 (RFC3261)
  • SIP server/proxy redundancy
  • NAT Traversal: STUN mode
  • DHCP/static/PPPoE/IEEE802.1X/open VPN
  • HTTP/HTTPS web server
  • Time and date synchronisation by SNTP
  • QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS DSCP
  • TLS(Transport Layer Security), SRTP
  • HTTPS certificate manager
  • AES encryption for configuration file
  • Digest authentication using MD5/MD5-sess


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