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SERVICES AND TOPOLOGIESCALL SERVER : VOICE ON IP
Ed. 04 9/12Réf. 3EH 21000 BSAA
Multi-site configurations
A multi-site configuration is possible via an extended Intranet or an Internet VPN.
H.323 gateway integrated into an extended Intranet
The IP router (R) connected to the Intranet can be a simple IP router. The reservation of bandwidth is
"guaranteed" if this router supports Ipv4 ToS (DiffServ).
H.323 gateway integrated into a VPN
The IP router (R/F) at the front end of the VPN must offer Proxy/Firewall and VPN server functionality
(IPSec with 3DES encryption for interoperability with the system's built-in router).
Extended Intranet
G : H.323-compatible gateway
R : IP router with permanent
connection
R
G
R
LAN
Company
ISDN / PSTN
Permanent
connection
Alcatel OmniPCX
R/F
R/F
Internet
VPN
LAN
G
ISDN / PSTN
Company
IP/Firewall router with permanent
connection (leased line, ADSL,
modem cable) +VPN Server
Alcatel OmniPCX
Permanent
connection
Permanent
connection
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