C-M-G
Series
Manual
© TDT GmbH
Chapter 5: Network Configuration
Seite 72 von 136
5.12.1.2.4 UMTS/GPRS PPP Interface Parameter
Command
Description
Numeric Provider ID
Set a prefered mobile operator for the radio connection using the
»Mobile Network Code« of your prefered mobile operator.
This might be useful or necessary, if several providers are
available, to suppress a fluttering between two or more providers.
The Numeric Provider ID is a combination of the three-digit Mobile
Country Code (MCC) and the two-digit Mobile Network Code
(MNC) and is specified without separators or spaces. (see
5.12.1.2.5 General PPP settings
Command
Description
On Demand Calling
Specifies whether the connection will only be established when
data has been sent (yes), or it will be established automatically
during start up. (Default: No)
Idle time before disconnect
The connection will be disconnected after
n
seconds, when no
more data has been sent or received
LCP-Echo-Failure
Using this option, the PPP connection will be closed if ther is no
reply to
n
LCP echo requests.
This option can be used to automatically disconnect a connection
if there is no response to the peer or which is already physically
disconnected.
LCP-Echo-Interval
This option causes an LCP echo request to be sent every
n
seconds.
This option would be used in conjunction with the
LCP-Echo-
Failure
option.
Clamp MSS
This function sets the Maximum Segment Size (MSS). It is
necessary to connect networks with different MTU’s, and thereby
to avoid transmission errors due to a possible fragmentation.
For this, the MSS is either automatically determined based on the
»Path MTU« (PMTU, the smallest MTU for the active network
path), or reduced to a predefined value.
Passive Mode
With the LCP option »passive mode« the router tries to establish
a PPP connection. If the remote station does not answer, it will
passively wait until the remote station creates a valid LCP
connection instead of a connection disconnect. (Default: No)
Silent Mode
Using the Silent Mode option, no LCP packets will be transmittet
for a connection establishment, until a valid LCP packet is
received from the remote station. (Default: No)
Magic Number negotiation
Activates the transmission of the magic number, a randomly
generated number that is used in LCP to identify the PPP
connections end points. With this option a possible loop-back can
be recognized. (Default: Yes)