Cisco UC320W Administration Manual page 78

Network
WAN
Cisco Unified Communications UC320W Administration Guide
WAN Types
• DHCP: Dynamic Host Control Protocol, the default option, is often used with
cable modems. Select this option if your ISP did not assign a static IP
address to your account and instead uses DHCP to assign an IP address
dynamically. No other information is required for this selection. Optionally,
you can enter a Domain Name, if provided by your ISP. Note: One
disadvantage of using a dynamic IP address is that if your IP address
changes, your Cisco UC320W and all connected devices will reboot.
Telephone service will be interrupted.
• Static IP: Select this option if your ISP provides you with a static IP
address. Complete the required fields. Also complete the optional fields if
the information was provided by your ISP.
• PPPoE (DSL): PPPoE is often used with DSL services. Select this option if
your ISP uses PPPoE and the router obtains an IP address by using PPP/
IPCP address negotiation. Complete the required fields. Also complete the
optional fields if the information was provided by your ISP. Finally, configure
your connection with the Keep Alive or Connect On Demand option, as
described below.
- Keep Alive: Choose this option to use Keep Alive messages to keep the
connection permanently open, regardless of the level of Internet activity
by your users.
- Connect on Demand: Choose this option to open a connection only
when a user attempts to connect to the Internet. In the Maximum Idle
Time, enter the number of minutes of inactivity that will cause the
connection to be terminated. This option is recommended if your billing
is based on the time that you are connected.
• PPTP DHCP: Select this option if your ISP uses PPTP (Point to Point
Tunneling Protocol) and did not assign a static IP address to your account.
Complete the required fields. Also complete the optional fields if the
information was provided by your ISP. Note: One disadvantage of using a
dynamic IP address is that if your IP address changes, your Cisco UC320W
and all connected devices will reboot. Phone service will be interrupted.
Finally, configure your connection with the Keep Alive or Connect On
Demand option, as described below.
- Keep Alive: Choose this option to use Keep Alive messages to keep the
connection permanently open, regardless of the level of Internet activity
by your users.
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