Figure 1-4 Trs Communication Process - Nortel VT100 Development Manual

A Meridian IVR 2.0/I process called the Terminal Resource Server (TRS)
controls all VT100 sessions, as well as manages all host connections. The
TRS runs as a stand-alone process within the Meridian IVR 2.0/I architecture,
and starts when Meridian IVR 2.0/I is started. To use the TRS, place a COMI
cell in the Meridian IVR 2.0/I call flow at the point where you need to
establish a host connection. The COMI cell sends requests for information to
the TRS process, which then passes them on to the host. A COMO cell
retrieves the information sent to the TRS process by the host, and then ends
the transaction. A COMA cell aborts the host transaction in the case of a
hang-up or an error. This process is shown in Figure 1-4.
Figure 1-4
TRS communication process
Host
The TRS process uses template files (described in Chapter 2) to control the
communication process between the Meridian IVR 2.0/I application and the
host computer.
As illustrated in Figure 1-4, the TRS uses the data passed to it by the input
buffer as a signal to establish a terminal session. The TRS then controls the
screen display on the host computer.
Meridian IVR VT100 Gateway Development Guide Product release 2.0/I
Input
Buffers
TRS
process
Output
Buffers
About the VT100 Gateway 1-5
Cleanup
START
Handler
COMA
ANSW
GDAT
MENU
1 2
COMI COMI
COMO COMO
PDAT PDAT
HANG