VOPTech DP21

The SIP based audio system DP21 utilizes the built-in intercom and paging capability already inherent in most modern IP PBX systems

Feature Highlights

  • 1-2 SIP Lines & buttons
  • Security-Protection level-IP65 and IK10
  • Short circuit input /output
  • Power over Ethernet (PoE)

  • TLS Support

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Data Sheet

• Support SIP2.0 (RFC3261) and correlative RFCs
• SIP support 2 SIP servers, and backup SIP proxy servers
• Supports SIP UDP / TCP/ TLS
• SIP support SIP domain, SIP authentication (none, basic, MD5) , DNS name of server, Peer to Peer / IP Call
• WAN / LAN:10/100M Ethernet ports
• 802.3af POE(optional)
• VLAN(Voice VLAN/Data VLAN)
• 802.1X
• NAT transverse :Support STUN client
• DHCP client on WAN/ DHCP server on LAN
• Main DNS and secondary DNS server
• DNS Relay
• SNTP Client
• Firewall and DMZ
• Web management access restricted
• VPN(L2TP/Open VPN)
• WEB ,telnet and LCD menu management
• Management with different account right
• Recover firmware and factory reset through POST mode
• Upgrade firmware via HTTP, HTTPS, FTP, TFTP
• DHCP option66 and custom option for auto provisioning
• Auto Provisioning to upgrade configuration file
with AES(256) encryption
• TR-069 and Syslog

• 3 way call conference
• Capable of 10 way conversation
Call pickup/ park/ back
• Redial
• Call completion
• Hot desking
• SIP messaging , MWI
• Flexible dial plan
• Barring function for outgoing calls
• Do not disturb
• Auto answer
• Caller ID display
• CLIR(rejects anonymous calls)
• CLIP(to make an anonymous call)
• Dial without registration
• Call logs with missed calls/ incoming calls/
outgoing calls. Each support 300 records
• Phonebook 500 records
• Speed Dial (abbreviated dialing)
• Call rejection
• Black List/ White List
• Intercom/Intercom barge
• Password dial, DTMF hidden
• Action URL/ active URI
• Voice codec setting for each SIP line
• Multicast
• LDAP, XML phonebook
• Web dial
• Keypad lock, Emergency call
• Large dot matrix LCD display and soft keys make user
easier to use
• Soft keys programmable
• Function keys programmable (each key have 2-color
led indication)
• Supports RJ-9 headset
• Multi languages displayed
•Codec: G.711A/u, G.7231 high/low, G.729AB, G.722, G.726-32
• DTMF: In-band, RFC 2833 and SIP INFO
• Full duplex hands- free speaker phone with acoustic
echo cancellation
• Voice Activity Detection (VAD)
• Comfort Noise Generation (CNG)
• Background noise suppression
• Adaptive jitter buffers
• Packet loss concealment
• mute
Physical features
• Adapter Input: AC 100-240V
• Adapter Output: DC 5V/1A
• WAN Port -10/100 BASE-T RJ-45 for LAN
• LAN Port-10/100 BASE-T RJ-45 for PC

• Keypad:1or2 DSS Keys (Speed Dial)

• RJ45 Ethernet Jacket x2: Network x1 (802.3AF POE Enabled), PC x1 (Bridged to Network)

• Main Chipset: Broadcom

• Passive Switch(short-circuit output): Normally Open and   Normally Closed highest at

30V/1A AC/DC

• Output interface for active speaker

• Audio record output interface

• 2 embedded short circuit input interfaces

• 2 embedded short circuit output interfaces

• Speaker: 3W/4Ω • Cables: CAT5 or better

• Power Supply: 9V~16V/1A DC or PoE

• Standby power consumption: 1.54W

• The call intercom of power consumption: 1.81W

• Shell Material: Front plate, aluminum alloy. Back plate, Cast aluminum

• Protection level: IP65 and IK10

• Working Temperature: -40~70℃

• Storage Temperature: -40~70℃

• Working Humidity: 10~90%

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