Specifications

Keri Systems, Inc. Doors
TM
Users Guide
01914-001 Rev. 5.5 Section 1: Installation of Doors 1-7
7.0 COMTEST Serial Port Test
The Keri Systems, Inc. COMTEST program is a simple program. It is designed to send a string of
characters out the host computer's COM port output and see if they are echoed back to the host
computer's COM port input.
It is not designed to determine if the COM port has more serious problems such as conflicts with other
devices on the host computer. Troubleshooting by a computer technician is required to resolve these
types of problems.
7.1 The Loop-Back Plug
To use the COM Test utility program, unplug the connection made from the access control system to the
host computer's COM port. Plug in the loop-back plug. The loop-back plug routes the output signal
from the serial port back to the input signal.
7.2 Starting COMTEST
1. Open the Windows Explorer program.
2. Locate the COMTEST.EXE program. For a default software installation the program can be found
in the “\kerisys\Doors_vX.XX\utils” subdirectory (where X.XX is the revision of the Doors
program).
1
3. Double-click on the COMTEST.EXE program icon, or click on the COMTEST.EXE icon and then
click on the File ⇒ Run pull-down menu option. COMTEST now begins.
7.3 Running COMTEST
1. When the program begins, the following screen appears.
KERI SYSTEMS INC. COMM TEST UTILITY
Plug in the Keri Loopback Test plug before starting the test.
Type C to set COM port
Type T to test COM port
Use icon in upper left to quit the program
PORT: COM2
STATUS: Untested
1. Earlier versions of Doors may be found in the “\kerisys\Doors32_vX.XX\utils” subdirectory.