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6-30 MAX 6000/3000 Network Configuration Guide
Configuring X.25
Setting up ISDN D channel X.25 support
Setting up ISDN D channel X.25 support
This section discusses support of nailed X.25 connection over the D channel, but T3POS,
X25/PAD, X25/IP, X25/PPP, and X25/MP (AO/DI) protocols are also supported over any
channel that supports nailed X.25 connections (for example, B channel and serial WAN).
Configuring ISDN D channel X.25 support
To configure the MAX to support X.25 over the signaling D channel:
1 Open Ethernet > X25 > any X25 profile.
2 Set TEI to the value specified by your X.25 carrier.
You can set TEI to any value from 1 to 63 for fixed TEI. The default is 21. If you set TEI
to 0 (zero), the MAX will use a TEI assigned by the network.
3 Set Call Type to D channel.
4 Exit the profile and, at the exit prompt, select the exit and accept option.
Customized X.25 T3POS support
MAX units with X.25 support X25 Transaction Processing Protocol for Point-of-Service
(T3POS), which can be used to send point-of-sale (POS) data over the ISDN D channel.
T3POS is a character-oriented, frame-formatted protocol designed for POS transactions
through an X.25-based packet switched network. T3POS enables you to send data over the
ISDN D channel while continuing to send traffic over both B channels. The T3POS protocol
involves three parties: the T3POS DTE (DTE), the T3POS PAD (PAD) and the T3POS Host
(host), as shown in Figure 6-6.
Figure 6-6. T3POS setup
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 6-7 shows an
example of a T3POS setup.
T3POS DTE
T3POS PAD
PSDN
T3POS Host
X.25 connection
Asynchronous
connection