Operation Manual

Configuring the Network

Basic Setup

Cisco SPA100Series Administration Guide 27

Static IP Settings • Internet IP Address and Subnet Mask: Enter the IP

address and subnet mask that was assigned to your

account by your service provider. This address is seen by

external users on the Internet.

• Default Gateway: Enter the Gateway IP Address that

was provided by your ISP.

If needed, you can adjust the MTU and Optional Settings, as

described below.

PPPoE Settings • User Name and Password: Enter the user name and

password that you use to log into your ISP network

through a PPPoE connection.

• Service Name: If provided by your ISP, enter the Service

Name.

• Connect on Demand: You can configure the ATA to

disconnect your Internet connection after a specified

period of inactivity (Max Idle Time). If your Internet

connection has been terminated due to inactivity, this

feature enables the ATA to automatically re-establish

your connection as soon as you attempt to access the

Internet again. If you choose this option, also set the Max

Idle Time.

• Keep Alive: This option keeps you connected to the

Internet indefinitely, even when your connection sits

idle. If you choose this option, also set the Redial Period,

which is the interval at which the ATA verified Internet

connectivity. The default period is 30 seconds.

If needed, you can adjust the MTU and Optional Settings, as

described below.

MTU The Maximum Transmission Unit (MTU) setting specifies the

largest protocol data unit (in bytes) permitted for network

transmission. Generally, a larger MTU means greater efficiency.

However, a larger packet may cause delays for other traffic and

is more likely to become corrupted. In most cases, you should

keep the default setting, Auto, to allow the ATA to choose the

appropriate MTU. To specify the MTU, select Manual, and then

enter the number of bytes.

Field Description