Cisco SPA112 Administration Manual page 18

Configuring the Network
Basic Setup
Cisco SPA100 Series Phone Adapters Administration Guide
Field
PPPoE Settings
MTU
Description
• 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.
Also: Enter the MTU, as described in this table, and see
Optional Settings, page
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.
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