User's Manual

56019201
Pag
e
© 2000 Telular Corporation
19
5.4 S
TEP
4: C
ONNECT
T
ELCO
L
INE AND
S
UPERVISORY
T
RIP
O
UTPUT
Now, you are ready to connect and test the incoming telco line and the supervisory trip output to the C/C.
Also, you must check to be sure that
there are no other phone devices connected in front, or in parallel, of
the RJ31X
.
TG3 Step 04 .VS D
HOST C/C
24 HOUR ZONE COMM ON
24 HOUR ZONE INPUT
TELCO DIALER
DETAILS ON JACK AND PIN ASSIGNMENTS,
TERMINAL STRIP, JUMPER, AND STATUS LEDS.
SEE APPENDICES A1.1 THROUGH A1.4 FOR
J2
FUSE 3A 3AG
T
R
1234
56
STC (COM)
STC (N.O.)
+ BATTERY 12V
- BATTERY
7
AC (16.5V 40VA)
AC (16.5V 40VA)
BLANK PIN
J1
EARTH GROUND
UNPLUG AND REPLUG J/J CABLE
(SUPPLIED) AT J1 AND VERIFY THAT
TELGUARD SWITCHES TO CELLULAR AND
BACK TO TELCO BY WATCHING THE STC
LED (3 flashes for LFC).
PROGRAM ZONE SHORTED FOR "SYSTEM TROUBLE".
E.O.L. RESISTOR
R
ANTENNA
TRANSCEIVER
RJ31X
PREMISE
PHONES
INCOM ING
TELCO
TELGUARD
LED MODE SELECT
J5
IN = RSSI
OUT = NORMAL
SIGNAL
STRENGTH
LEDS
AC POWER
SYSTEM TROUBLE
RADIO TX
OPERATION MODE
STATUS LEDS
(See Appendix A1.4)
BE SURE TELGUARD IS FIRST DEVICE ON INCOMING
PHONE LINE TO PREVENT
PHANTOM TRIPPING.
5.4.1 Be sure the Telguard is the first device on incoming phone line
The Telguard monitors voltage on the incoming phone line to decide when to switch transmission
paths. This requires that the Telguard
must be the first device on the telco line
. If not, a line fault
condition will be created (we call this a "phantom trip") each time the improperly connected device
goes off-hook. This happens because the Telguard‘s line fault monitor detects the parallel "taps" to
the street side of the RJ31X.
A phantom trip causes the Telguard to switch to cellular and if the STC trip-out is connected and
programmed to trip the C/C, the C/C will call the central station over the cellular network to report
the "Line Fault" (phantom trip). The result is a phone line trouble report although the incoming line
measurements are good at the RJ31X. Therefore, look over
Exhibit I
(
next page
) carefully and be
sure that there are no other phone devices connected to Tip and Ring on the incoming phone line.