Specifications

Connection Charge Reduction and Limitation
10 AVM Access Server – 1 Welcome to the AVM Access Server
Connection Charge Reduction and Limitation
Thanks to intelligent line management, the AVM Access Server ensures
that the costs for ISDN connections to remote networks are kept to the
bare minimum. The following features minimize costs:
The AVM Access Server maintains a logical ISDN connection while
interrupting the physical connection. A logical ISDN connection
constitutes a record of all the connection information negotiated
at the initial connection set-up between the systems at either end
of an ISDN WAN link. This information includes the network proto-
cols used, authentication procedures, spoofing mechanisms and
channel bundling.
The physical ISDN connection is established when one or more
B channels are in use and accruing connection charges. When no
data is being transferred over the ISDN line, the AVM Access
Server can drop the physical connection automatically to save
connection costs. The logical connection is maintained for a time
specified in the remote network’s configuration in the AVM Access
Server, so that the remote user or network is still considered
present in the LAN, and any resources in use remain available. As
soon as data needs to be transported again, either the AVM
Access Server or the remote site can reestablish the physical
connection.
Proven filtering and spoofing mechanisms intercept certain over-
head data packets and prevent them from being transported un-
necessarily over the ISDN link. This reduces the total physical con-
nection up-time. These AVM Access Server features ensure that
the ISDN line is dialed up almost exclusively for user data, and
that most LAN overhead traffic is kept off the ISDN link.
Connection charges are kept under full control by configurable
budget limits (per day, week and month) on the charges them-
selves, on the connection up-time and on the number of outgoing
calls.
Budgets can be defined for each remote network or user individu-
ally.
Connection charges can be assigned using COSO (Charge One
Site Only) to ensure that all WAN costs are charged to the main of-
fice, for example.