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Our Price: £357.00 (428.40 inc VAT)

Product Code: ZYCU20BRI

The CooVox-U20-2BRI IP Phone System feature two inbuilt BRI (ISDN 2) ports (4 Channels) making this an ideal solution for those with ISDN lines or as an ISDN gateway for those wanting to update legacy systems.

CooVox-U20 is a next-generation smart IP PBX System designed and optimised for today's business telecommunication needs. CooVox-U20 is an affordable, scalable, interoperable, secure and reliable solution which provides not only traditional PBX features such as Automated Attendant and Voicemail, but also many advanced features including Remote Extensions, Conference Bridge, Call Recording, Call Detail Records (CDR), Automatic Call Distribution (ACD), Web Dial, Unified Messaging (Voicemail to Email), and many more features.


  • Call Features
  • Call Back
  • Call Forward
  • Call Hold
  • Call Paging and Intercom
  • Call Park
  • Call Pickup
  • Call Queue
  • Call Recording
  • Call Routing
  • Blind Transfer
  • Attendant Transfer
  • Call Waiting
  • One Number Stations
  • Caller ID
  • Dial by Name
  • Music On Hold/Transfer
  • 3-Way Conference
  • Video Call

PBX FeaturesBlack List

  • BLF (Busy Lamp Field)
  • CDR (Call Detailed Record)
  • Conference Room (20 Rooms)
  • Call Monitoring
  • DID (Direct Inward Dialing Number)
  • DISA (Direct Inward System Access)
  • Distinctive Ringtone
  • DND (Do Not Disturb)
  • DNIS (Dialed Number Identification Service)
  • Feature Codes
  • FOP (Flash Operation Panel) Status Monitoring
  • Follow Me
  • IVR (Interactive Voice Responses)
  • Mobility Extension
  • Multi-Language Prompts
  • Multi-Language GUI
  • One Touch Recording
  • Phone Book(LDAP Server)
  • Phone Provisioning
  • Pin Set
  • Record File Download
  • Ringgroup
  • SIP Register with UDP/TCP/TLS
  • SIP Trunk
  • Skype for SIP
  • Smart DID
  • Speed Dial
  • Spy
  • SRTP (Secure Realtime Transport Protocol)
  • T.38 Fax (Pass-through)
  • Time Based Rule
  • WebRTC
  • Voicemail & Voicemail to Email
  • System Capacities
  • Up to 15 Concurrent Calls
  • Up to 20 Conferences
  • Up to 30 IP Phone Registers/Extensions

Codecs & Protocols

  • Audio Codecs: G.722/G.711-Ulaw/G.711-Alaw/ G.726/G.729/GSM/SPEEX
  • Video Codecs: H.261/H.263/H.263/H.264
  • Protocols: SIP (RFC3261)/IAX2 DTMF: RFC2833/SIP INFO/In-Band 0V2

Network Features

  • DDNS Client DHCP Server IPv4/IPv6/IEEE802.1Q
  • IP Assignment (PPPoE/DHCP/Static) SNMP
  • Static Route
  • Table Trouble Shooting (Ping/Traceroute)
  • VPN Client (N2N/L2TP/PPTP/OpenVPN/IPSec)
  • VPN Server (PPTP/L2TP/OpenVPN/IPSec)

Security Features

  • Refuse SIP Register DoS
  • Refuse Abort Invite DoS
  • Refuse SSH Login DoS


  • Logs PBX Log Web
  • Log PBX Debug Log