How An Ip Phone Works - 3Com 4500 PWR 26-Port Configuration Manual

10
Voice VLAN Configuration
Wh n configuring voice VLAN, g e
Voice VLAN Overview
Voice VLAN Configuration
Displaying and Maintaining Voice VLAN
Voice VLAN Configuratio
Voic e VLAN Overview
Voice VLANs are VLANs configured specially for voice traffic. By adding the ports connected with voice
devices to voice VLANs,
QoS-related configuration for voice traffic as required, thus ensuring the transmission priority of voice
traffic and voice quality.
How an IP Phone Works
IP phones can convert analog voice signals into digital signals to enable them to be transmitted in
IP-based networks. Used in conjunction with other voice devices, IP phones can offer large-capacity
and low-cost voice communication solutions. As network devices, IP phones need IP addresses
o perate properly in a network. An IP phone can acquire an IP address automatically or through manual
configuration. The following part describes how an IP phone acquires an IP address automatically.
The following part only describes the common way for an IP phone to acquire an IP address. The
detailed process may vary by manufacture. Refer to the corresponding user manual for the detailed
in formation.
Wh n an IP phone applies for an IP address from a D e
following extensive information from the DHCP
IP address of the network call p
IP address of the secon
Voice VLAN configuration
Failover call routing
o to these sections for information you are interested in:
n Example
you can have voice traffic transmitted within voice VLANs and perform
server through the Option184 field:
rocessor (NCP)
dary NCP server
10-1
HCP server, the IP phone can also apply for the
to