User manual

4200 User Manual Edgewater Networks, Inc.
Version 2.2 10
same network resources to guarantee low latency and the highest call quality
possible for VoIP traffic. At the same time they ensure the best utilization of
WAN bandwidth by enabling data traffic to burst up to full line rate in the
absence of voice calls. Precedence is given to traffic for the range of
addresses reserved for the IP phones.
 NAT/PAT translation for IP phones and PC’s. This allows a single public IP
address to be used on the WAN link to represent all of the private IP
addresses assigned to the LAN IP phones and PC’s.
 Static NAT entries. This enables the customer to use a WAN public IP address
for data servers (web, mail, ftp, etc.) connected behind the 4200. These
servers can then be configured with private IP addresses for additional
security.
 A “VoIP” aware firewall. A full layer 7 gateway for voice traffic and a stateful
packet inspection firewall for data traffic.
 Call Admission Control (CAC). CAC uses a deterministic algorithm to decide
when there are insufficient network resources available to adequately support
new calls and then return the equivalent of a “fast busy” to new call requests.
 DHCP server and TFTP relay. These features are used to simplify and
expedite the IP configuration of phones and PC’s. This also includes VoIP
signaling gateway information (MGCP, SIP, H.323 and SCCP).
 Call quality monitoring and test tools.
Configuration Outline
Configuration Guide For Station Side IP PBX Applications
Most private enterprise VoIP networks use an IP PBX at the corporate headquarters
location to provide voice switching between headquarters, branch offices and the
PSTN. The 4200 is used in these environments to securely connect branch office
employees to the IP PBX installed in the corporate headquarters location.
Task
Subtask
Configure For IP Centrex
Application?
System Configuration
configure LAN/WAN interface
Yes
set ethernet link rate
Optional
enable the DHCP server
Optional but recommended
configure SNMP
Optional
VoIP Configuration
enable the VoIP ALG
Yes
configure a VoIP subnet route
Optional
Data Networking Configuration
dynamic NAT
Optional but recommended
static NAT
Optional
static IP routing
Optional
Firewall Configuration
enable the data firewall
Yes
configure basic settings
Optional
configure advanced settings
Optional
Traffic Management Configuration
enable traffic shaping
Yes
enable Call Admission Control
Yes