Operation Manual

Leased Lines
30 NetWAYS/ISDN – 3 Remote Access with NetWAYS/ISDN
The following diagram illustrates the cost allocation function
using the “remote system” setting.
Call-back and cost allocation to the remote system by COSO (Charge
One Site Only)
Leased Lines
In addition to dial-up connections, ISDN is also used to pro-
vide leased lines. If the data traffic to the remote network is
so high that a leased line is more economical than dial-up
operation, NetWAYS/ISDN also supports ISDN leased lines.
No additional hardware is necessary.
NetWAYS/ISDN supports leased lines with one B channel
(Deutsche Telekom’s Digital 64S). Furthermore,
NetWAYS/ISDN also supports BRI lines which use one
B channel as a leased line and the other for dial-up connec-
tions.
D channel
Signal of connection
request
D and B channel
Transmission of
data packets in
both directions
Idle ISDN
connection
cleared
D and B channel
Transmission of
data packets in
both directions
AVM Access Server
Connection request
rejected.
Call-back with
costs carried by the
local end
Data packet for
the remote
site, e.g. e-mail
Remote site identified
by means of the D-
channel number
D and B channel
Remote Computer
Data packets for
the remote
network
Acceptance of the
incoming call
(after authentication,
if required)
Acceptance of the
incoming call
(after authentication,
if required)
D and B channel
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