Inter-Tel GMX-48 INSTALLATION & MAINTENANCE Manual

INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE TROUBLESHOOTING 
Issue 2, May 1990 
FIGURE 6-l. LIGHT-EMITTING DIODE (LED) INDICATIONS 
l!Js 
RUN 
DFSCRlPTlON 
Lit when the KSU is functioning normally. Flashes when the KSU is not operating 
properly. 
CO BUSY Lit when there is a C.O. call in progress. 
IC BUSY 
MINOR ALARM Lit when there is an intercom call in progress. 
Lit when a minor alarm has occurred. The light goes out when the alarm message is 
cleared (as described in FEATURES, page...

TROUBLESHOOTING Issue 2, May 1990 INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
4. ALARM MESSAGES AND FIELD (check wiring), defective station cable, or a de- 
SERVICE DIAGNOSTICS fective KCB or EXP 
4.1 Alarm messages can be programmed to appear 
on display keysets, in the SMDR printout, or as a 
separate error printout. When listed in a printout, 
alarm messages are preceded by + + + and the time 
of day when the alarm occurred. (2) #ll Write Protect Circuit Fail: The circuitry 
that prevents...

INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE TROUBLESHOOTING 
Issue 2, May 1990 
(12) #22 Accessory Port B - No 
Txt Int.: The APM 
RS-232-C port has no transmit interrupt func- 
tion. Replace the APM and return it 
for repair. 
(13) #23 Accessory Port B - No Clock: There is a 
problem with the clock on the APM. Replace 
the APM and return it for repair. 
.‘: 
.$’ 
, 
:; 
‘.: 
., C. MAJOR ALARMS THAT REQUIRE 
IMMEDIATE ATTENTION 
4.4 If a major alarm is detected by the system, the 
RUN LED...

TROUBLESHOOTING 
Issue 2, May 1990 INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
b. 
C. 
d. 
e. 
f. ?? $xX: The system has detected an invalid 
data byte from a keyset or DSS/BLF Unit. 
This message may occur when the line cord 
is removed from a keyset or DSS/BLF Unit 
and when the 25pair cable is removed 
from the KCB or an EXI? In these cases, no 
action is required. However, if the error oc- 
curs repeatedly for a station circuit or a 
group of station circuits for which the line 
cord or...

INTER-TEL PRACTICES TROUBLESHOOTING 
GMX-48 INSTALLATION 2% MAINTENANCE 
Issue 2, May 1990 
(6) 
(7) 
(8) 
The following messages indicate minor soft- 
ware errors. Although they detect inconsistent 
operation, they generally do not warrant a sys- 
tem reset. If any of these messages should oc- 
cur, note the circumstances under which they 
occurred and contact Customer Support. 
Invalid Input > Keyset: Xx State: XXX Input: XX 
Invalid Input >Keyset: XX State: Xxx Timer No.: XX 
Invalid Input >SL Set: XX...

TROUBLESHOOTING INTER-TEL PRACTICES 
Issue 2, May 1990 GMX-48 INSTALLATION & MAINTENANCE 
5. TROUBLESHOOTING CHARTS 
5.1 The troubleshooting charts located on the fol- 
lowing pages list symptoms, possible causes, and cor- 
rective actions for problems. Look up the problem in 
the appropriate chart and perform the corrective 
actions in the order given. The troubleshooting pro- 
cedures for correcting equipment failures have been 
divided into five categories: 
A. System 
B. C.O. Lines 
C. Features 
D....

INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
‘.. 
TROUBLESHOOTING 
Issue 2, May 1990 
E. SINGLE-LINE SETS 
5.6 The following problems are discussed in Figure 
6-6 on pages 6-34 through 6-37. 
0 
l 
_: 0 
--. 
a 
0 
l 
Single-line set is inoperative. 
A group of six single-line sets is inoperative. 
Cannot obtain intercom dial tone. 
Cannot place an intercom call. 
Cannot break C.O. dial tone. 
Cannot place off-hook voice announce calls. 0 Single-line sets not receiving message waiting in-...

TROUBLESHOOTING INTER-TEL PRACTICES 
Issue 2, May 1990 GMX-48 INSTALLATION & MAINTENANCE 
FIGURE 6-2. SYSTEM TROUBLESHOOTING CHART 
SYMPTOM 
Repeated occurrence 
of dropped calls 
J’ROBAf3L.F CAUSF 
AC line is not isolated 
and dedicated 
Defective power 
supply 
KSU located near a 
strong magnetic field 
or other potential 
source of interference 
(copy machines, power 
transformer, etc.) 
IC-CO/CO-CO discon- 
nect timer(s) need(s) 
adjustment 
Inter-ring silence timer 
value is set too sensitive...

INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE TROUBLESHOOTING 
Issue 2, May 1990 
FIGURE 6-2. SYSTEM TROUBLESHOOTING CHART (CONT’D) 
SYMPTOM 
Auto-answer modem 
for remote programming 
inoperative 
PROBABLE CAUSE 
Baud rate does not 
match RS-232-C port 
and/or the commu- 
nication parameters 
are not compatible Refer to page 2-16 for proper settings and 
complete specifications. 
Defective cable Replace the cable. 
Defective modem Refer to the manual included with the 
modem. 
Improper...

TROUBLESHOOTING 
Issue 2, May 1990 
I. 
INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
FIGURE 6-2. SYSTEM TROUBLESHOOTING CHART (CONT’D) 
SYMPTOM 
DISA inoperative 
PROBABLE CAUSE 
User error 
Telephone not User must dial in from a DTMF 
compatible telephone. 
Programming error Ensure that the DISA line is identified 
correctly as a day or night DISA line. 
Refer to PROGRAMMING, page 5-39. 
Perform network self test. Refer to 
PROGRAMMING, page 5-128.  Defective system 
channel or switching...