Vigor IPPBX2820 集 IP-PBX（SIP Server）、防火墙与 VPN Server 于一身，价格亲民，适合中小型组织。其 VPN 功能可解决多种 VOIP 情境。具备 1× FXS 与 1× FXO，可弹性延伸既有电话系统，经由网际网络互通而不产生额外通话费。
与许多其他品牌不同，Corecasys 销售产品时一并提供售后服务与操作所需知识。作为系统整合商（SI），我们协助您将产品用到满足需求为止。长达三周的试用政策也证明：购买后设备必须稳定协助您的工作——而非制造问题与困扰。
Hardware Interface
1 x 100Base-TX WAN port, RJ-45
2 x Configurable (NT/TE), RJ-45
IP PBX Features
Registration and authentication
Extension Privilege Assign
Call Barring, Call Routing, Call Park *, Call Pickup *
In/Outbond call through FXO Interface *
In/Outbond call through ISDN-TE Interface
MWI ( Message Waiting Indicator )
VoIP
G.168 line echo-cancellation
Voice codec : G.711, G.723.1, G.726, G.729, VAD/CNG, iLBC *
DTMF tone : Inband / Outband ( RFC-2833 )/ SIP Info
FAX/ Modem support : Tone detection / G.711 pass-through / T.38 for FAX *
VPN
Protocol : PPTP, IPSec, L2TP, L2TP over IPSec
Encryption : MPPE and Hardware-based AES/DES/3DES
Authentication : Hardware-based MD5, SHA-1
IKE Authentication : Pre-shared key and digital signature ( X.509 )
LAN-to-LAN, Teleworker-to-LAN
Dead Peer Detection ( DPD )
Firewall
Multi-NAT / DMZ host / Port-redirection / Open port
SPI ( Stateful Packet Inspection ) ( Flow Track )
E-mail alert and logging via syslog