Edgewater Networks 4200 Series Manual de início rápido - Página 7
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WAN/LAN IP routing
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NAT/PAT translation for IP phones. 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.
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A "VoIP" aware firewall. A full layer 7 gateway for voice traffic.
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Traffic shaping and priority queuing to guarantee the quality of VoIP traffic.
These mechanisms protect voice and data traffic from contending for the
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.
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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.
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DHCP server and FTP/TFTP relay. These features are used to simplify and
expedite the IP configuration of phones. This also includes VoIP signaling
gateway information (MGCP and SIP).
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Call quality monitoring and test tools.
4200 configuration:
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VoIP ALG enabled
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NAT enabled
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Routing enabled
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Traffic shaping enabled
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DHCP server enabled
Benefits
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Security of private IP addresses and voice aware firewall
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Traffic shaping prioritizing voice over data traffic.
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Recover bandwidth for data when not used for voice
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Simplified management and administration
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Simplified adds, moves and changes
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Scalability – the single public IP address can continue to be used for new
subscribers to the service.
Although not recommended the 4200 and IP phones can be installed behind an
existing enterprise firewall. In this instance the firewall will have to be configured to
allow access to and from the 4200 public IP address for the following ports:
Port Type
Firewall Ports to Open
UDP
161 (SNMP) and 162 (SNMPTRAP)
RTP
1056 to 1255
TCP
SSH TCP 22 for remote management & TCP 80 for WAN configuration-
downloads
Telnet
23
FTP
TCP 21 for state-full TCP-session control from
FTP server
4200 to Edgewater