Introduction to Tandem X.25 Capabilities

Flexible Call-Setup
Tandem X.25 Features and Capabilities
065307 Tandem Computers Incorporated 2–9
Call Redirection with Notification
The call redirection facility redirects calls when the destination DTE is busy, is
out-of-order, or has requested a call redirection. This facility allows a call to be
rerouted to a backup DTE, so that problems and failures do not affect the end user.
Call redirection can also permit calls to be redirected to different parts of a country to
allow for time-zone differences.
Call redirection with notification informs the alternative DTE that the call is redirected
and contains the reason for the redirection as well as the address of the originally
called destination DTE .
This optional user facility is automatically provided by X25AM. The user application
can issue a procedure call to obtain the reason that the call was redirected or deflected.
Call Line Address Modified Notification
This facility permits the DCE to inform the calling DTE why the called address in a
call-connected or clear-indication packet is different from the address in the DTE’s
call-request packet.
This optional user facility is automatically provided by X25AM. The user application
can issue a procedure call to obtain the reason that the called address was modified.