User Manual

Modems Terminal Adapters
9-12
9.4.9 Dialback
Dialback allows a system manager to set up a dialback of authorized users for incoming modem
connections. When a username matching one in the list is entered, the port will be logged out and the user
will be called back at the predefined number.
For a complete discussion of Dialback, see Dialback on page 11-6.
9.5 Terminal Adapters
ISDN Terminal adapters (TAs) are similar to modems. Modems convert asynchronous serial signals to a
form that can be transmitted via regular phone lines, while terminal adapters convert asynchronous serial
signals to a form that can be transmitted by ISDN phone lines. The main difference between using these
devices with the SCS is the complexity of TA setup, which varies by telephone service provider.
For the most part, the SCS interacts with a TA in the same way that it interacts with a modem. However,
two things must be taken into account when using a TA with the SCS:
◆ Although some TAs can autodetect certain settings, it is not always possible to auto-configure
information needed for the connection, such as the caller’s own phone number. Therefore, no TA
profiles are preconfigured for the SCS itself. TA users must edit the generic modem profile so that it
can be used with their specific TAs and ISDN service providers.
Note: Lantronix provides Tech Tips that outline the configuration needed for certain
specific terminal adapters. To find out if your TA’s configuration is included in
a Tech Tip, contact your dealer or Lantronix technical support.
◆ B-channel ISDN connections are much faster than modem connections. Those who wish to use the
SCS bandwidth-on-demand functionality should take this speed increase into consideration when
configuring bandwidth settings.
9.6 Caller-ID
Three commands provide the SCS with basic Caller-ID functionality, provided that Caller-ID is available
and the SCS is attached to a modem capable of decoding Caller-ID signals.
Define Ports Modem CallerID Enabled allows the SCS to parse Caller-ID information that it receives
from the attached modem.
Figure 9-13: Turning on Caller-ID
Note: The modem should be configured for either Single or Multiple Message Format;
the SCS cannot parse information in raw data format (ASCII coded
hexadecimal). See your modem’s documentation for configuration.
Local>> DEFINE PORT 2 MODEM CALLERID ENABLED