Casio TE-1500 Setup Manual page 7

Connecting Your Equipment
NOTE:
Before connecting anything to the cash register unplug the cash
register's power source. Connecting equipment together while power is still
being supplied can result in equipment damage (component & equipment
failure).
1) On the right hand side of your Casio cash register where power cord comes
out there is a cover. Between the cash drawer and the cabinet there is a small
slot, put your fingers in this slot to pull the cover off. Once the cover off you will
see the following:
2) Removing the cover exposes the Communication ports. There are two (2) DB
9, male connector COM ports that are labeled COM 1 (PC) and COM 2
(scanner). The PAX payment terminal will be connected to COM 1, the cable
with the 9 pin connector (see sample COM port picture below) will plug into this
connection.
COM2 / Scanner COM1 / PC
3) The PAX SP-30 device has a coiled Y-cable attached with two (2) RJ
connectors. There will be a second cable with a RJ-15 and DB-9 connector.
Connect the RJ-15 connector into the corresponding connector on the SP-30 and
the DB-9 connector on COM 1 of the cash register.
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