Figure 6-4 Example Of A T3Pos Configuration; Protocol Summary - Lucent Technologies MAX 6000 Configuration Manual

Configuring X.25
Setting up ISDN D channel X.25 support
A typical use of T3POS is performing credit card authorization over the D channel while using
the B channels to transmit inventory control data and other traffic. Figure 6-4 shows an
example of a T3POS setup.
Figure 6-4. Example of a T3POS configuration
Retail outlet
Asynchronous lines
PPP/MPP traffic
(B channels)
The Lucent T3POS implementation supports the following T3POS features:
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Protocol summary

This section provides a brief summary of the T3POS protocol. For complete details about the
protocol and the MAX X.25 PAD, see to the documents listed in "References" on page 6-30.
The T3POS protocol provides reliable and efficient data interchange (transactions) between a
host (usually a transaction server) and a DTE (usually a client). The T3POS DTE is usually a
client device communicating through an asynchronous port, while the T3POS host is a
mainframe or server communicating through an X.25 packet network. The T3POS PAD (the
MAX) converts data arriving from a T3POS DTE to a format that can be transmitted over a
packet network. It also ensures reliability and efficiency as described in the protocol
specifications.
6-28
PC or terminal
server
X.25/T3 POS traffic
(D channel)
PSTN
Corporate site
Local, Transparent, Blind, and Binary-Local mode
T1-T6 timers
All the control characters, described in Bellcore GR-2803
Error recovery procedures, described in Bellcore GR-2803 and EIS 1075-V2.1
DTE-initiated calls
Host-initiated calls
Cash registers / kiosks
Ethernet
PSDN
Credit card
transaction center
MAX 6000/3000 Network Configuration Guide