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Chapter 3: Terminal Menu Operation and Structure
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Express L128/L128T User Manual
67
Authentication/Call ID 1
Write security: 1; Read security: 3
The caller identification from the ISDN incoming call is compared to this num-
ber, starting from the right digits.
Authentication/Call ID 2
Write security: 1; Read security: 3
The caller identification from the ISDN incoming call is compared to this num-
ber, starting from the right digits.
Connection List/IP
The IP menu contains the parameters for exchanging IP data with the PPP 
peer.  Static routes can also be created from here for IP dial-on-demand appli-
cations.
IP/Mode
Write security: 3; Read security: 5
Setting to On (def) will permit this connection profile to negotiate PPP IPCP 
with the PPP peer for exchanging of IP packets.
IP/NAT
Write security: 3; Read security: 5
The Express L128/L128T can perform Network Address Translation.  This fea-
ture is most widely used when connecting to the Internet.  The Ethernet net-
work can consist of private network numbers.  When this profile is connected, 
all IP addresses on the Ethernet side are translated into the one real IP address 
negotiated with the PPP peer (ISP).  Multiple stations on the Ethernet side can 
access the Internet simultaneously.  See the section IP/NAT on page 43 for 
more global options.  Setting this option to On will cause the Express L128/
L128T to perform NAT.  In the Off (def) position, the unit will route across the 
connection normally.
IP/Route
The IP parameters are configured in this menu.  Adjusting these parameters is 
only necessary for certain dial-on-demand applications.  Usually the Express L128/
L128T will automatically discover the PPP peer’s networks using PPP IPCP and/or RIP.