Data voip – ZyXEL Communications P-2900-4HB User Manual
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Chapter 3 Status
P-2900-4HB User’s Guide
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cable modem part is used for data traffic, and the MTA part is used for VoIP traffic.
The following figure illustrates how it works.
Figure 8 CM and MTA
Management IP Addresses
The ZyXEL Device automatically gets one CM and one MTA management IP
addresses from the cable service provider when the cable connection is
established. They are private IP addresses. The ZyXEL Device uses these to
communicate with the service provider’s network. When the cable connection is
not ready, you can access the Web Configurator using its LAN IP address (default
is 192.168.1.1). When the cable connection is up, you can access the Web
Configurator either using its LAN or WAN static IP address.
WAN IP Address(es)
If your computers/devices need to access the Internet or provide services to
Internet users, you must apply for one or multiple public IP addresses from your
cable service provider. The WAN interface can have up to three public IP
addresses. Configure them in the Advanced Setup > Static IP screen. See
for a configuration example.
Cable Network Initiation Process
The ZyXEL Device has to communicate with your cable operator’s Cable Modem
Terminal Service (CMTS) in order to establish a cable network connection. As
ZyXEL Device (Embedded MTA)
MTA
MTA Configuration File
MTA IP Address
MTA MAC Address
Data
VoIP
CM Configuration File
CM IP Address
CM MAC Address
Cable Modem