Hapter; Network Configuration Guidelines; For Voip; Isp/Intranet Quality Of Service (Qos) - Altigen MAXCS ACC 6.5 Administration Manual

Network Configuration Guidelines

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
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maximum network delay is less than 100 milliseconds.
Also, the typical packet loss rate should be less than 1 percent.
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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 6.5 or above with two NICs for 802.1Q VLAN
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MAXCS 6.5 or above for 802.1p
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NIC support 802.1p for 802.1p
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The following IP phone firmware:
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VLAN: 2x65 or above and boot code version 12 or above
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802.1p: 2x8x (MAXCS 6.5 firmware)
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Layer 2 managed switch
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for VoIP