ZETRON 640 DAPT XTRA, Installation And Repair Manual

Page: 66 / 210

Installation
54 025-9416
Note: Once the terminal block adapter is installed, the serial ports for trunks C and D (if a
second dual trunk card is installed) are partially blocked. This should not create a
problem as long as all alphanumeric serial input is directed to trunks A and/or B. Be
aware of this minor inconvenience when configuring the trunks in the database to
avoid extra work.
Telco Interface to the Terminal Block Adapter
Once the terminal block adapter is properly connected to the Model 640, the trunk lines can be
interfaced to the telco phone lines. Generally, each of the four phone jacks on the adapter are
connected to standard wall jacks with RJ14 cabling. However, some applications may require
different telco wiring.
Follow the steps below to connect the terminal block adapter to the telephone lines:
q 1. Power-down the paging terminal.
q Use the supplied telephone cords (Part No. 709-7000) or make an appropriate cable for
each of the active trunk interfaces (two or four, depending on the number of trunk cards
installed). One end of each cable should have an RJ14, 6-pin plug for the connection to
the terminal block adapter jacks. The other end should have whatever type of connector
is required for the specific application.
2.
Table 7 shows the pinouts for the jacks on the terminal block adapter (J1 - J4).
Table 7. Telco Interface (J1 - J4) Pin Configuration for Terminal Block Adapter
Pin # Wiring Connection
1 (top) E (ear) lead
2 Tip lead 2
3 Ring lead 1
4 Tip lead 1
5 Ring lead 2
6 (bottom) M (mouth) lead
q 3. Connect a clamp-on ferrite (Part No. 305-2025) to the Model 640 end of each tele-
phone cord as shown in Figure 21. Four ferrites are supplied with the installation
interface assembly option for suppressing RF noise interference.