ZETRON 640 DAPT XTRA, Installation And Repair Manual

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Communications Setup
025-9416 35
Installation Procedure
To setup the system for local RS-232 connection, follow the steps below:
q 1. Determine the office computer’s serial communication port (usually COM1 or
COM2) and the connector type (DB-9 or DB-25).
q 2. Obtain or make an appropriate RS-232 connector cable. It should have a male 9-pin
connector at one end and a female 9-pin or 25-pin connector for the computer’s serial
port at the other end. A Zetron ZLINK (Part No. 709-7565) cable provides
connection to a 9-pin computer COM port.
If the office computer has a 25-pin COM port, a standard adapter (DB-9 male to DB-
25 female) can be used to mate the Zetron cable to the computer. Otherwise, a cable
can be constructed using the pinouts as described in Figure 11.
5
9
1
6
male
female
(1) DCD
(2) Rx
(3) Tx
(4) DTR
(5) GND
(6) DSR
(7) RTS
(8) CTS
(9) RING
shield (20) DTR
(2) Tx
(3) Rx
(8) DCD
(7) GND
(6) DSR
(5) CTS
(4) RTS
(22) RING
(1) shield (4) DTR
(3) Tx
(2) Rx
(1) DCD
(5) GND
(6) DSR
(8) CTS
(7) RTS
(9) RING
shield
Model 640
Computer (DB-25) Female DB-9
1
6
5
9
Figure 11. ZLINK Cable (Part No. 709-7565) Pin Configuration
q
3. Make the hardware connections between the computer and the Model 640 as shown
in Figure 12. Note that there are several 9-pin serial inputs on the back panel of the
paging terminal. The local connection port (labeled “COM PORT”) is located on the
lower right back panel of the Model 640 chassis.