GuestWorks and DEFINITY ECS Release 9
Technician Handbook for Hospitality Installations
555-231-743 Issue 1
November 2000
Installing the System
5Additional Parts and Test Equipment
Additional Parts and Test Equipment
Other than the tools and test equipment noted in the installation manuals , you
should also have the following items available on site:
■RS232 mini-tester (comcode 407515139)
NOTE:
The mini-tester shows positive voltage with a green LED and
negative voltage with a red LED. This can be verified by
connecting the mini-tester to a printer’s EIA port, adding power
to the printer, and then putting the printer on-line. The Data
Terminal Ready (DTR) lamp should then light with a positive
(green) voltage. You may already have your own mini-tester that
shows positive voltage as red and negative voltage as green. If
this is true at your installation, the mini-tester result diagrams
shown in this handbook must be read from an “opposite”
perspective; that is, if the book shows that DTR should be green,
and you have a mini-tester that operates in an “opposite” mode,
your mini-tester will show DTR being red. This change in
perspective should be true for all data leads.
!CAUTION:

After using a mini-tester to check data leads, you MUST remove

the mini-tester from the connection. DO NOT leave the mini-

tester in-line during actual operation.

■RS232 gender changers and M25A or M25B RS232 cables
■Analog line used to place test calls.
See “Appendix A — Parts List” on page 242 for a list of the parts u sed for this
installation. Part numbers are provided in case replacements must b e ordered.