Altigen ACC 6.7, Administration Manual

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MAXCS ACC 6.7 Administration Manual 295
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H A P T E R
24
Network Configuration Guidelines
for VoIP
Real-time applications such as voice communications require a networking environment
that meets certain requirements to deliver and maintain good voice quality.
The following network configuration guidelines are highly recommended when using
MAXCS VoIP features.
ISP/Intranet Quality of Service (QoS)
•
If you subscribe to the public IP network or use your own Intranet, make sure the
maximum network delay is less than 100 milliseconds.
• Also, the typical packet loss rate should be less than 1 percent.
Virtual LANs
MAXCS supports virtual LANs in accordance with IEEE 802.1Q. A virtual LAN (VLAN)
segments an Ethernet-based network into different logical networks that provide
different services such as data service and voice service. It also defines broadcast
domains to reduce network traffic load. It provides a managed network environment to
run voice and data together smoothly.
The IEEE 802.1Q header includes IEEE 802.1p, a standard method for assigning priority
to packets traversing a network. It works with the Ethernet MAC (Media Acccess Control)
header at the data link layer. The managed switches in a network are responsible for
differentiating packets based on their priorities and processing them in different orders.
Requirements
• MAXCS 6.7 or above with two NICs for 802.1Q VLAN
• MAXCS 6.7 or above for 802.1p
• NIC support 802.1p for 802.1p
• The following IP phone firmware:
• VLAN: 2x65 or above and boot code version 12 or above
•
802.1p: 2x8x (MAXCS 6.7 firmware)
• Layer 2 managed switch