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CardSaver: Quick Tour - Hardware
Topology
CardSaver
runs on a computer that connects to an IP/PSTN gateway
with IVR support. Cisco or Quintum Gateways are used
to support the IVR connection. The IVR interface enables
the system to relay and/or play voice messages to
customers, prompting them to input numeric information
using their phone's keypad.
This information can
include the caller's account number, PIN, and the
number the caller wishes to reach. The numbers that
the caller enters can therefore be transmitted by
the Gateway in RADIUS format over the IP network to
the CardSaver RADIUS compliant server. The server
can then use the inputted data to identify the customer,
verify their identity using the PIN code, check the
account status, and send back messages in RADIUS format
telling the Tenor switch whether or not to proceed
with the call.
When the call is made,
the PSTN routes the call to the VoIP Gateway. The
VoIP Gateway sends a RADIUS packet to the CardSaver
system and based on the number dialed, the CardSaver
asks the caller to enter the desired long distance
destination number and instruct the VoIP Gateway to
transfer the call. CardSaver then informs caller of
the amount of credit left on the account. CardSaver
calculates this amount by using a rate table created
by the administrator of the system. The connection
between caller and the dialed number is then made.
Once the call is disconnected, the VoIP Gateway sends
a Radius packet to the CardSaver system informing
that the call has been disconnected. The CardSaver
system then deducts the appropriate amount from the
caller's account.
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