AltiGen MAXCS 7.0 Update 1 ACM Administration - Manual (Page 315)

MaxCS 7.5 Administration Manual 299
C H A P T E R
25
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. Follow these network configuration guidelines when
using MAX Communication Server’s 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 ser-
vice. It also defines broadcast domains to reduce network traffic load. It provides a managed network environ-
ment 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 Access 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 7.5 or above with two NICs for 802.1Q VLAN
• MAXCS 7.5 or above for 802.1p
• NIC support 802.1p for 802.1p
• The following AltiGen IP phone firmware:
– VLAN: 2xA8 and boot code version 12 or above
– 802.1p: 2xA8 (MAXCS 7.5 firmware)
• Layer 2 managed switch
• The NetFilter driver is installed in the MAXCS server side. For the IPTalk client, the NetFilter driver will be
installed only when the QoS and 802.1p function are enabled with the IPTalk integrated setting.