NSN835(P) IP Phone
◆Support SIP 2.0 (RFC3261) and SRTP protocol
◆Support IAX2,iax2 line key call
◆Support 2 SIP lines, the user can register to 2 SIP server at the same time,through a server for  any incoming and outgoing calls
◆Support multiple call queuing
◆Speech coding support: Codec:G.711A/u, G.723.1 high/low, G.729a/b, G.722.1,G.726,AMR
◆Support HD voice
◆Echo cancellation:Support G.168, Hands-free can achieve 96 ms echo cancellation
◆Support Voice Gain Setting, VAD, CNG
◆Support for hands-free full-duplex communication
◆SIP support SIP domain, SIP authentication (none, basic, MD5) domain name resolution, peer IP calls
◆DTMF support: SIP info, DTMF Relay, RFC2833
◆Support 9 systems ringtones and three user-defined ringtones
◆Large screen LCD  display screen with all soft function keys more easier.
◆Support headphone interface(RJ9)
◆Customizable multinational language versions, English is the default
◆SIP application: Support call forward/transfer(Turn blind/attend transfer/signalling transfer)/ On hold/call waiting/three-way calling/ paging and intercom/Call Park / grab pick / Barge / Auto Callback / Click to Call / secondary dial automatically/Blf/ Presence/ SRTP/ SMS
◆Flexible call control functions:; flexible dialing, support hotline number, Empty calling reject, reject blacklist, authentication call, white list, limit dial, DND, hands-free auto-answer, caller ID (reject anonymous calls ), anonymous calls, no registration call etc.
◆Support received calls / missed calls / dialed calls each record 100
◆Support 500 phone book records
◆Support XML phonebook/browser
◆Support Speed Dial
◆With IP PBX / IMS service code calls configuration operations
◆Support web click to dial the phone book
◆Speech coding based on SIP line configuration
◆Support keyboard lock, the emergency call number and keyboard lock condition
◆Headphones, hands-free ringing
◆Support POE power supply (optional)
network characteristic
◆WAN/LAN: Support the bridge mode and NAT
◆Bridge model support the hub
◆Support PPPoE for xDSL
◆Support PoE(optional)
◆Support VLAN (VoIP vlan/data vlan)
◆QoS with DiffServ
◆Support 802.1x
◆Support basic NAT and NAPT
◆Support STUN
◆WAN port support DHCP Client
◆LAN port support DHCP Server
◆WAN port support the main from the DNS server functions
◆Support DNS Relay
◆Support openVPN
◆Support SNTP Client
◆Support the firewall
◆Support VPN L2TP
◆Support DMZ
◆Support network tool: including ping,trace route,telnet client
Management and maintenance
◆Management through Web, Telnet configuration and keyboard operation
◆Support user privilege management
◆Support safe mode, and can be a software update in safe mode
◆Support HTTP/HTTPS,FTP,TFTP (and other ways to update software or configuration file)
◆Support dhcp option66 automatic updates
◆Telnet remote management support file uploads and downloads to improve the reliability of safe mode
◆Supports automatic upgrade, can automatically update the version or configuration file
◆View the system log
Article Title
  Software Name  

About us

Shenzhen Guowei Cesller Technology Co., Ltd., founded in 1996, is one of the largest manufacturers of professional group phone system in China.

Read more


certificate NSN9000 3C Certificate for China Compulsory Product

Read more

Get in touch with us

Shenzhen Guowei Cesller Technology Co.,Ltd.

East of Building 4, Weihao Industrial Park, Shakeng Road, Sunshine Community, Xili Street, Nanshan District, Shenzhen

  • +86-755-26515028
  • scb@cesller.com.cn
  • chat now
  • Manager Yang:+86 13612897792
  • Lanny Liu:+86 15013708905