Rauland-Borg Telecenter IV Operating instructions

Troubleshooting
KI-1586A
Telecenter® IV
Troubleshooting
RAULAND-BORG CORPORATION l 3450 West Oakton Street, Skokie, Illinois 60076-2951 l [phone]
Table of Contents
DISPLAY PHONE DIAGNOSTICS
#73 Hardware I/O Diagnostics
..................................................................................
2
GeneralProcedures
..............................................................................................
2
System Halting and VoltageMeasurements
........................................................
6
Line Type Tests
C.O. and PBX Trunks
.................................................................................... 7
Speakers..
........................................................................................................8
Phone Lines
....................................................................................................
9
Call-In Switches
..............................................................................................
10
#744 Call-in Sensitivity (RP2) Adjustment
..................................................................
11
#75 LLM Line Link Tests
............................................................................................
12
COMPUTER AIDED DIAGNOSTICS
Computer Monitor Set-up
..........................................................................................
13
Serial Port Monitor Commands ..................................................................................
14
Other SerialPort Output ............................................................................................
15
TROUBLESHOOTING AND REPAIR
TCN Find-It Fix-It Procedures
Time Saving Hints and Suggestions
....................................................................
16
System Won’t Run or Locks-up
............................................................................
16
System Will Not Program
......................................................................................
16
Phone Won’t Ring
................................................................................................
17
Time Tones DoNot Work
....................................................................................
17
All-Page Problem
..................................................................................................
17
Phone Rings-back Upon Hanging-up
..................................................................18
System Misdials or Won’t Allow Access
(Intermittent)
...................................... 18
Talk Path Noisy or Dead (Intermittent)
..............................................................
18
Crosstalk On Lines
................................................................................................
18
Phone Rings When Call Should Go To Attendant
........................................ ..1
...
19
False Call-ins After All-Call or Time Tone
............................................................ 19
Supplementary Procedures
Finding Duplicate Numbers
................................................................................20
Phone Line TAP Functions (Transfer Capability and Cradle Switch Tests)
......20
Ground ResistanceMeasurement
........................................................................
2 1
Loss Measurement
................................................................................................ 21
Lockout (Line, Link, or Receiver)
........................................................................22
Statistics ................................................................................................................
23
Loop Sense Measurement
.................................................................................... 24
Line Rebalancing Procedure
................................................................................25
Console Interface Adapter
(TC4420)..................................................................27
LCD Display Problems (General)
........................................................................27
Single Link Staff Phone Problems
(General)
......................................................28
Speaker Intercom Problems(General)
................................................................28
Interconnect Problems(General)
........................................................................29
QUICK REFERENCE CHART
..............................................................
30
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)
Page 1 of 30

Troubleshooting
DISPLAY PHONE DIAGNOSTICS
#73 Hardware I/O Diagnostic
Summary: This is the primary diagnostic of the TC4 system. The #73 I/O Diagnostic is a powerful
method for exercising all of the features and functions of any physical number in the system
from one point, using a display phone. It provides direct access to TCIV hardware thru the
flat cable buses by reference to physical numbers, link numbers, and desired actions (relay
on, phone line connect, etc.). It can be used to verify physical number associations with
hardware and physical number addressing. Keep the following in mind when using the
#73 I/O Diagnostic.
Special characteristics enable dealing with in-use lines and when troubleshooting in
interconnect situations.
It bypasses all attributes, location codes and other software details.
A system halt feature permits direct measurements of d.c. voltages on flat cables
which control expansion modules.
Individual LLM lines and relays can be tested.
Caution: Perform the #73 diagnostic when the system is not busy: It will tie up a DTMF receiver and
may interfere with other system functions, or
vice versa It can also leave the system in a state
unknown to the processor (e.g., by leaving a speaker relay on or leaving a phone connected
to a link). To avoid this problem, reset the system after performing this diagnostic.
GENERAL PROCEDURES
Step 1. Dial #73 on a display phone. The display will ask for a Physical Number. When the number
is entered, the display phone will be connected via a link to a DTMF register. The display field
will appear as follows.
NNNN LL V HT AA
NNNN = The Subject physical number. This value can be incremented or decremented using
the telephone touch-key pad. The remaining displays fields provide a status report from the
main program on the hardware associated with the displayed Subject physical number. Any
commands entered through the touch pad will apply to the displayed Subject physical
number.
A special null procedure can be invoked for the Subject physical number. The null procedure
keeps the main program from interfering with tests on the associated hardware (e.g.: taking a
phone off-hook or grounding a call switch will not produce dial tone or a call-in).
The null procedure is normally deleted when the number is changed or when you hang up.
However, if the last keystroke before changing the Subject physical number or hanging-up
was a connect or relay on command (key
1, 2, or 3), version 102 software allows the proce-
dure to remain invoked. This allows conducting tests involving several lines and/or permits
hanging-up to release the receiver for
traffic handling.
Page 2 of 30 1989 Rauland-Borg Corporation (Orig. 10/88; Rev. t/89)

Troubleshooting
Always clear connections and procedures established by the diagnostic by resetting the
system or issuing the appropriate disconnect commands.
LL = Link Number (00 to 15). Upon
#73 initiation, this is the link used by the test phone
and its receiver. They will remain in this link. If the displayed link number is changed, all
future connect commands use the new link number. This allows connecting two phones to a
link which is not the test phone link and enables communication which is Inaudible to the
test phone or its receiver.
This display field also changes while checking in-use lines for audio and so forth. The link
number of the in-use line will be displayed when the test phone is connected to it, using the
connect command key [
1]. The test phone link number will reappear upon return to the test
link.
v=== Activate VCM Intercom. This display indicates that there is a minimum speaker load
across the
VCMs terminals, making it active. The V field information was not available prior to
version 102 software. To see the V displayed, select an SC25 line with a speaker and send the
relay on command (press key
[2]). Then, send the relay off command (press key [5]) and the
V will disappear.
HT = Hook switch (H) and Call-in switch (T) status for the Subject line. This field will
display some combination of two characters from the following lists (e.g.: +R).
H = Hook switch status character will be either +, -, or N:
+= An off-hook is detected for the Subject line.
- = An on-hook is detected for the Subject line.
N=
No LLM or no line hybrid is detected on for the subject line.
T= Call-in Switch status character will be either G, R, or N:
G
= A ground is detected on the SC25 T (call-In) terminal.
R= A resistor ground is detected on the T terminal
N= No connection is detected on the T terminal
The HT display field status indicators represent external inputs to the
TCIV. They do not
indicate whether the associated line is in use. In some cases service requests are ignored by
the system (e.g.: NNNN >5 11) and in some cases service is provided without a service
request (e.g. most in-use C.O. trunks will not show
+).
A two-digit hexadecimal figure will appear in the HT field in software versions prior to version
102. A table for Interpreting these hexadecimal values is provided with the procedures for
performing Line Type Tests. This information can be derived from Drawing KC1461.
AA = Number of Active Lines in the system (0 - 64). The probability that using the diag-
nostic will interfere with traffic increases directly with the number of lines in use.
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)
Page 3 of 30

Troubleshooting
Step 2. Refer to the following explanations of key functions and the keypad illustration on the following page
and perform keystrokes as required.
Function:
[1]
Connect the line associated with the Subject physical number (NNNN) to the LLM link (LL). If
the subject line is on-hook, the LLM will send a single ring burst to the phone.
[1]
Connect the Test Phone and its receiver to the link being used by the display line. This will
enable monitoring of ongoing voice and audio for test purposes. If a conversation is inter-
rupted, announce testing and press
[4] immediatly to return to the test link.
[2]
Turn on a speaker relay associated with the displayed physical number. If a speaker is at-
tached, this will connect the VCM (intercom amplifier) to the speaker’s terminals on the SC25
and a
V will appear in the display.
To hear the VCM, connect the telephone end of the VCM to the same link as the talk/listen
phone. Typically, the VCM is connected to line 2.
[3]
Connect the single link staff phone relay. This will connect the specified single link staff
phone to the LLM line which is shared by all single link staff phones.
[4]
If the LLM line is not in-use, it will be disconnected from a connection ma& with the #73 di-
agnostic.
[4]
If the displayed LLM line is in-use, the test phone and its receiver will be disconnected from it
and reconnected to the test link.
[5]
[6]
Turn off the speaker relay.
Disconnect the single link staff phone relay. This will disconnect the specified single link staff
phone from the LLM line which is shared by all single link staff phones.
[7]
Increment the NNNN display field to the next higher physical number.
If the last keystroke before doing this was 1, 2, or 3, a null active list record is invoked to
block the main programs normal scanning function for this line. This will prevent the system
from producing dial tone or call-ins and so forth, allowing lines to be connected and exer-
cised without disturbance from main system functions.
[8]
[9]
[0]
[*]
[#]
[#]
Increment the LL display field to the next higher link number. This will change the default
link used when an LLM connection is made. The new link becomes the default link
Start a 941 Hz tone signal which is on for 5 seconds and off for 5 seconds. This tone may be
used for crosstalk, signal to noise ratio, and loss measurements.
Decrement the LL display field to the next lower link number. This will change the default
link used when an LLM connection is made. The new link becomes the default link.
Decrement the NNNN display field to the next lower physical number.
Comments under
[7] apply here also.
Stop the 941 Hz tone.
If the 941 Hz tone is off, the # DTMF tone will be produced and can be used for making
measurements.
Page 4 of 30
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)

Troubleshooting
Notes:
1.
An on-hook LLM phone will ring each time a connect signal is sent to it. The ring
burst is hardware controlled by a logic hybrid and plug-in LLM line hybrid.
2. If you connect two LLM lines to the same link, they can communicate until one is
dis-
connected or the system is reset.
3.
Sending a speaker connect signal will cause an audible click on the SC25 as the relay
energizes. A V will appear in the display if a speaker is connected to the designated
circuit.
Caution: If you disconnect or change links on either your own (the display phone’s) physical number
or that of the line used for the DTMF register, use of the display phone for communication
and
testing will be terminated and the system will have to be RESET.
Test Tone A 941 Hz. test tone (5 seconds on and 5 seconds
off) can be obtained for performing audio
measurements or listening tests. The tone is available to the test phone or any phone in the
link with it. Little display interaction is required, so any phone can be used which has its
B:78
attributes set to on. Tone levels are affected by the phone’s impedance, the test phone line
hybrid, the number of phones in the test link, and component tolerance in the MI0 generator
circuits. Typically, tone levels are as follows:
.25 vrms, -10 dbm at the receiver connection to an LLM (0 or 1)
.10 vrms, -17 dbm across a phone line.
Note:
The telephone keys
operate as a two by
three matrix: Each
vertical pair (e.g.: 1
and 4, 8and 0, etc.,)
addresses a common
function (i.e.: LLM,
Speaker Relay, etc.).
The uppermost key
makes a connection
or increments a
numerical value and
the lower key of a
pair ends a connec-
tion or decrements a
numerical value.
Line Link No.
Decrement
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89) Page 5 of 30

Troubleshooting
System Halting and Voltage Measurements (#73)
Summary:
Voltage reading on flat-cable buses can be performed using the #73 diagnostic or the diag-
nostic disk program, which is simpler and does not require access to the MIO. Either method
requires halting the system, during which time no calls can be made or features accessed.
However, this test will not disturb calls in progress. These measurements are important trou-
bleshooting aids when the TCIV is operating intermittently or is unable to access certain
physical numbers.
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Dial
#73 and enter the physical number of the line to be tested, then ground pin 66 of the A
connector on the back of the MI0 (refer to Drawing KC1461). This ground halts the system
and produces a static condition on the flat-cable buses.
Using a one-megohm (or higher) digital meter, measure the voltages on the flat-cable pins.
For
TC4150 LLM’s, access may be gained at the end of the flat-cable. For TC4110 SC25’s or
TC4120 SCC25’s, access may be gained by unplugging the flat-cable from any board not
under test. For ease of testing, a flat cable connector (e.g.: 3M NO3399) can be crimped to the
flat-cable to provide test access.
Refer to the MI0 schematic (KC1461) to identify each pin/conductor number and verify the
voltage reading obtained represents the appropriate binary number.
If Physical Line 7were entered in the display, the binary number 7(0000000111) may be
verified by measuring 12 volts on LLM flat-cable conductors 18, 20, and 2 1 and 0 volts on
conductors 12, 13, 14, 15, 16, 17, and 19. The least significant four bits, measured on con-
ductors 19, 20, 18, 21 (Pin 18 is at binary position 2), represent the LLM circuit number (0 to
15). The remaining bits represent the DIP switch setting of the LLM.
For speakers, the flat cable is divided into two sections. Section one is a five-bit relay select
number (0 to
24), respectively representing relays 1 through 25. Section two is a six-bit binary
module select number which represents the DIP switch setting for the module under test.
Using a one-megohm (or higher) digital meter, measure the multiplex
(MPX) voltage from
the TC4150 LLM to verify the following for the specified line. This will require taking the
phone on and off-hook at the remote station associated with the physical number under test:
On-hook Less than 5 volts
Off-hook
Greater than 7 volts
Open circuit
6 volts (+/- 0.5 volts)
Note:
An open circuit condition may indicate that there is no LLM or no line-hybrid for the
specified circuit. If the open circuit voltage is outside the range shown, an LLM is loading the
MPX line and needs to be repaired or replaced.
Using a one-megohm (or higher) digital meter, measure the voltage between wires
A and B
on
the SC25 bus and verify the following by using the call-in switches at the target remote
location associated with the physical number under test:
No Call-in Less than 100 mvolts
Normal Call-in Over 600 mvolts
Emergency Call-in 200 mvolts
(Note: This is from a switch with a resistor.)
Note: Use appropriate troubleshooting techniques and schematics to progressively define any
problems in individual expansion modules, circuits, and components.
Step 6. Remove the jumper from pin
A:66.
Page 6 of 30
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)

Troubleshooting
Line Type Tests (#73)
Summary: The I/O hardware diagnostic requires different procedures on different line types for checking
out various hardware, including remotes and wiring. These procedures bypass all program-
ming by directly operating relays and circuits based upon physical numbers. Therefore, after
connecting a relay or phone line, disconnect it before proceeding to the next physical num-
ber.Reset the system after using this function or ensure no connections remain which will
interfere with service.
Note:
Practice these procedure on a demo or known good system before using it in an actual
troubleshooting situation.
C.O. & PBX Trunks
Step 1. Dial
#73, then enter the lowest or highest physical number of the type of trunk to be tested.
Step 2. Press
[1] and verily one of the following conditions exist:
Trunk busy: The system connects the test phone and its receiver to the link in use.
The
LL field of the display will reflect the change. and a conference-call will
exist between the trunk users and test phone.
Say,
“Testing” to announce your presence and immediately press [ 4] to dis-
connect from the link and return to the test phone link.
Caution: Do not
press
[ 4] again, it will disconnect the specified line from the trunk and the
call in progress will be cut-off.
Trunk idle: Dial tone is received at the test phone.
Press [4] to restore the trunk to idle.
Step 3. Press
[ 7] or [ *] to go to the next physical number and return to Step 2 until all trunks have
been tested.
Special Notes on Central Office Trunks:
Pressing
[1] to connect a trunk establishes loop current to the C.O. and lights the CO LED on
the associated COA module. However, if the C.O. trunk is held too long due to a defect in the
TCIV (software or other), the C.O. may cut-off or sharply reduce its d.c. feed to the trunk line.
If this happens, pressing
[1] will not get dial tone or turn on the CO LED. The trunk will
appear dead, even with a linemans test set.
Correct the condition by opening the loop for a few seconds and then closing it. Do
this by pressing
[ 4] twice . . . waiting a few seconds . . . and then pressing [ 1].
When a trunk line is ringing-in, there will be a + in the HT display field. When the ringing
stops, and after a several second delay, the + will change to a
-. If a special provision has
been made for an external service request, the + will remain as long as the external service
request is asserted.
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. t/89)
Page 7 of 30

Troubleshooting
Speakers
This test will identify open or grounded speaker lines via the VCM Speaker Sense current
(refer to Drawing KC1472). An alternative to the following test would be to place a meter or
meters across the D and E terminals of a target speaker to monitor dc resistance and/or
resis-
tance to ground.
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Note:
Dial #73, then enter the lowest or highest physical number of the group of speakers to be
tested.
Test Option: After entering #73, enter the physical number of the VCM, press [1] and
then increment or decrement to the desired physical number with
[ 7 or *] . This will allow
talk/listen audio from each speaker when tested.
Press [ 2] to turn on the speaker relay and note the following if a speaker is present:
A supervisory beep occurs at the remote location.
A V appears in the display if there is an SC25 relay and speaker and the speaker
station does not have an activated privacy switch.
If the test option was selected in Step 1, room sounds will be audible at the test
phone. If there is no audio, a ground or activated privacy switch may be present.
Press
[5] and verify the V goes off and the supervisory beep discontinues. If this doesn’t
happen, another relay and speaker may be on.
Press [ 7] and verily the physical number in the display increments by one.
Return to Step 3 and repeat the above steps until all speakers have been tested.
Some tests require monitoring the HT display field. If the software in use is prior to version
102, a two-digit hexadecimal value will be displayed instead of the characters noted in the
procedures. If a hexadecimal value appears, use the following #73 Hexadecimal Equivalents
Table to interpret the display.
Find the displayed hexadecimal value under HEX and then locate the equivalent character set
under HT. Note that each character set may be represented by either one of two different
two-digit hexadecimal values. The
H character represents the hook-switch status and the T
character is the Call-in Switch status.
#73 Hexadecimal Equivalents Table
HEX HT HEX
HT
HEX HT
00 80 --G 10 90 NG 18 98 +G
02 82 --R 12 92 NR lA 9A +R
03 83 --N 13 93 NN 1B 9B +N
Page 8 of 30
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)

Troubleshooting
Phone Lines
Method 1
This procedure can be used to test a series of lines very quickly. It is especially useful for
determining which keys of a key system are associated with which lines, as well as verifying
that lamp and audible ringing functions operate as wired or programmed. This test is not
in-
tended to test all LLM functions of all lines in all links: Use the #75 LLM Line Link Test for
that.
Step 1.
Step 2.
Step 3.
Note:
Dial #73, then enter the lowest or highest physical number of the type of phone line to be
tested.
Verify the HT display field hook switch status is correct:
+
if the subject phone is off-hook.
if the subject phone is on-hook.
Press
[1] and verify one of the following conditions exist:
Line in use: The system connects the test phone and its receiver to the link in use.
A conference-call situation exists between the line users and test phone.
The LL field of the display reflects the change.
Say, “Testing” to announce yourself and immediately press [4] to disconnect
from the link and return to the test phone link.
Press [7] or [ *] to go to the next physical number and return to Step 1 to
continue testing
Caution: Do not press [ 4] again: the specified line will be disconnected,
cutting-off the call in progress.
Line idle:
One ring burst occurs each time the [l] is pressed. If a key system, one or
more ring bursts starting immediately or after several seconds delay.
Take
the phone under test off-hook and verify that the - changes to +, in-
dicating the line hybrid detected the off-hook status of the line and transmit-
ted it to the CPU.
Verify two way communication between the test phone and the phone line
under test. If a
key system, place the line on hold and verify the + remains
on the display. Also verify that the correct visual and audible indications
occur.
Press
[ 4] to disconnect.
If a problem occurs in Step 3, do the following:
Check and correct any errors in the key system wiring and/or programming.
Try replacing the line hybrid in the suspect
LLM (TC4150).
Step 4.
Press [7] or [*] to go to the next physical number and return to Step 2 to continue testing.
1989
Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)
Page 9 of 30

Troubleshooting
Phone Lines
Method 2
Two phones can be connected to a link other than the test phone link to allow them to talk
or send tones without affecting test phone commands. This will allow the advanced trou-
bleshooter to perform additional tests (e.g.: voltage measurements, functional checks, etc.).
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
Dial
#73, note the display phone’s test LL Display Field; then, enter the physical number of
a phone line (phone
A) to be tested.
Press [0] or
[8] to change the LL Display Field to a value different than that being used by
the test phone.
Press
[1] to connect phone A to the selected link.
Press [ 7] or [ *] to display the physical number of another phone line to be tested (phone B)
Press [1] to connect phone B to the selected link and verify an audio connection between
phones A and B.
Using phones A and B, perform whatever tests are desired. During this time, the test phone
may be hung-up and phones A and
B will remain out of service.
Upon completion of testing, either disconnect phones
A and B by pressing [4] on the test
phone or reset the system.
Call-in
Switches
The main program detects the status of each call-in switch as a function of its relationship to
ground. This enables the system to distinguish different types of call-ins. In case of problems
perform the
#74 RP2 Adjustment Procedure.
step 1.
Step 2.
Step 3
Dial #73, then enter the lowest or highest physical number of the call-in switch lines to lx
tested
Note t he character displayed in the HT display field
G = ground on the T terminal, indicating an active normal call-in.
R = resistive ground on the T terminal, indicating an active emergency call-in.
N = no connection is detected on the
T terminal, indicating the switch is passive.
Place a normal or emergency call-in, or simulate one as follows.
Normal
Ground the call-in line.
Emergency Place a 1.5k resistor to ground on the call-in line.
Step 4.
Verify t he LIT display field changes and provides the correct indication (as defined in Step 2).
Step 5. Repeat steps
3 and 4 for any untested switch positions, ending with the N displayed. Then,
press [7] or [ *] to go to the next physical number and return to Step 2 to continue testing.
Page 10 of 30
1989 Rauland-Borg Corporation (Chg. 10/88; Rev. t/89)

Troubleshooting
Call-in Sensitivity (RP2) Adjustment (#74)
Summary: This test will prevent any new system activity from being initiated but will not interfere with
calls and functions already in progress.
Step 1. Dial
#74 from the display phone, then enter the physical number of the Speaker Control
board line to be tested and keep the phone off-hook.
Step 2. Place a
1.5K ohm resistor across the T and G terminals of the line under test.
Step 3.
Step 4.
Ground pin 66 of the A Connector on the back of the MIO.
Monitor the test phone receiver for a clear tone while adjusting RP2 (located at the front of
the MI0 near the CPU flat-cable) in the following manner:
Slowly turn RP2 counter-clockwise until the tone becomes scratchy.
Slowly turn RP2 clockwise until the tone just becomes clear again.
Step 5. Mark the position of RP2 and repeat Step 4 from the clockwise end of the adjustment range
and, again, mark the position of RP2.
Step 6.
Step 7.
Center RP2 between the two marks.
While monitoring the test phone receiver, remove the resistor installed in Step 2 and verily
the tone goes away. If it doesn’t, the resistor may be on the wrong terminal. If so, repeat the
entire procedure, starting at Step 2.

LLM Line Link Test (#75)
Summary:
Step 1.
Step 2.
Step 3.
Note:
Step 4.
Step 5.
Step 6.
This procedure is used to check out all the LLM functions for each line. These include: off-
hook sense, audio to each link, DC, and ringing. This test will interfere with anyone using the
system. Hang up the test phone to halt the test at any time.
Dial
#75 from the display phone, then enter the physical number of the first line to be tested.
Note that the following prompt, CONNECTION TIME?
, appears on the test phone display.
Enter a value (in
6Oths of a second increments) and press # (e.g.: 30# for l/2 second).
Verily a single ring occurs at the phone associated with the specified physical number.
Step
4 is complex. Before beginning it, prepare to note the time (in seconds) at which the
target phone is taken off-hook and be ready to send a DTMF tone from the target phone to
the test phone.
Take the target phone off-hook and
verify a clear communication path exists between it and
the test phone for a period of time equal to 16 times the time period specified in Step 2. (i.e.:
if Step 2 value is 120, this period is
32 seconds).
Note: During this time period, the system is making and breaking the connection between
the two phones via each link in the system, starting at 0 and proceeding sequentially
to 15. The length of each connection is determined by the value entered in Step 2.
The tone should be clearly audible and subdued clicks may be heard as each link is
made and broken. If the value in Step 2 is high enough the click will be slow enough
to count.
Verily a dead line exists for a few seconds after the time period identified in Step 4 and that
this is followed by another sequence as specified in Step 4.
If a link is faulty, the tone will be interrupted during the connection. To determine
which link is faulty, count the clicks, starting at 0. Use the Bus
I/O diagnostic to verify
your finding or to check the links individually.
If an on-hook phone is available on the line at the next physical number, hang up the first
phone and verify the next one rings; then, take it off hook and verify the results obtained in
Steps 4 and 5. This process can be quickly advanced down the line to test a
complete LLM
module.

COMPUTER AIDED DIAGNOSTICS
Computer Monitor Set-up
Summary:
With its serial port connected to the TCIV CPU, directly or through a modem, a computer
provides a powerful system analysis and troubleshooting tool. A dumb computer terminal or
one that can act dumb is required for these procedures. (See Drawing KM0873 for modem
connections.)
Caution: The TCIV does not supply the negative voltage required by RS232 standards; however, most
serial ports will still work with the TCN CPU. Ensure compatibility before procuring a system
for performing these procedures.
Step 1.
Build a cable to go between the computer serial port and the TCIV 4 pin connector on the
CPU Note: This cable is similar to the one required for connecting a modem to the TCIV. See
Drawing KM0873; if using a laptop, use 9pin connector pins 3, 2, and 5 instead of RS232 25
pin connector pins 2,
3, and 7, respectively.
Step 2.
Install a communication program in the computer and set it up in accordance with the
following checklist.
Baud rate = Jumper setting on TCIV CPU.
Com
Port =Serial Port (COMl, COM2, etc.).
8 bit, no parity.
Full Duplex (Input characters are displayed when returned from the TCIV.)
Step 3. Test the program by connecting the serial port cable connector Out jack to its In jack, start
the program, and type some characters. If it is operational, they will appear on the screen.
Remove the jack and type some characters; they should not appear on the screen if operating
in full duplex mode. (Out and In refer to the direction of signal flow and are always con-
ncctcd out to in; otherwise, the two outputs wilt compete for control of the voltage on the
terminal and the two inputs wilt wait for drive signals.)
Step 4. Install
the modem or serial port connector onto the CPU, ensuring Out goes to In and vice
versa .
step 5. Press the Reset button on the CPU and verify that T5 appears on the terminal screen. This
indicates the CPU self
test of memory, clock, and UART was successful. If it is not received,
check and
correct any problem with the following:
5 volts power at the CPU
Baud
rate and other settings as described in Step 2.
Serial port connection between the TCIV and the computer or modem.

Troubleshooting
Serial Port Monitor Commands
Summary:
The TClV’s built in monitor program responds to one-letter commands and hexadecimal
numbers. The principal commands are shown below in bold and quotes (i.e.:
“X”) variable
values which can be input with commands are not in bold and are outside quotation marks.
The quotation marks are never part of the command or variable. An example of each com-
mand is given along with an explanation of its use.
These commands are available to any terminal or computer with a communication program.
They are used by the TCIV diagnostic program for the personal computer to accomplish more
extensive diagnostic functions.
aaaa"=
"
bb’.“cc”.”
"Space"
“H”
"X"
dddd”S”
“R”
ee”0”
" "
I
PPPP A G
“return”
Set the reference address to the value defined by the hexadecimal input aaaa.
Use to establish communication with a port (e.g.:
5= or FOOO=)
Store bytes bb and cc in memory, starting at the reference address.
Use to change a value in RAM or EEPROM (e.g.:
5.E5. )
CPU must be switched to
ENable to change EEPROM.
Example: To set the Monitor Lock (Location Code 64100 which is FA64 in
hexidecimal notation) to zero, enter “FA64=0.0.”
Display the byte from the reference address and increment the address.
Halt the TCIV program (Location Code
64100 must have been set to 0).
Restart the TCIV program.
Send the data block (aaaa to dddd) to the serial port in the
INTEL hexadecimal format (Use to save an EEPROM Image.)
Data block includes all data from the reference address (aaaa)
to the ending address (dddd) .
Receive a file in the INTEL hexadecimal format and store it until the
End of File command is received. (Use to load an EEPROM image.)
Output byte (ee) to the port defined in the reference address.
Input the byte from the port defined in the reference address.
Call a function at the reference address.
Parameter pppp is an optional hexadecimal value for use by the function
located at the reference address.
h G means hold down the control key and press G.
(e.g.: OOOO= A G will reset the TCIV; reference address 0000 contains the
reset function and no parameters were required.
00005 =
h
G will call a TCIV function that computes and reports the TCIV
checksum value.)
Move the display cursor to the left margin of the next line and print the
current reference address.
Page
14 of 30
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)

Other Serial Port Output
Troubleshooting
Data Entry
Step 1.
Step 2.
Call in &
Answer
Logging
step 1.
step 2.
Keystroke
Monitoring
step
1.
step 2.
U SC to identify the architectural number and DTMF mcssagc of any administrative phone line.
Note: The Telecenter Diagnostic Program will time and date stamp input data and print or
save to disk.
See detailed description in the manual for the Diagnostic Disk Program.
Dial
#23: Upon hearing a long beep, hang up, or dial some additional digits (note the digits
and their scqucnce) and
then hang up.
Verify
that a message appears on the screen identifying the architectural number of the tested
line and
the dialed digits.
This
function logs the identity of any staff phone which places a call-in, as well as the type of
call-in
made. Various administrative functions such as paging and answering call-ins may also
be
reported.
Turn on
the function at Location Code 64206 (See Programming Section).
Place
several call-ins and verify that the correct architectural numbers and call-in type data is
displayed on the screen.
This function indicates which administrative phones are connected/disconnected with which
receiver and, if
tones are produced, what they are. It also reports Call Control Console
keystrokes.
Turn on the function by adding 8 192 to the Receiver Time Limit at Location Code 64012 (See
the Programming
Section).
Perform phone line tests while monitoring screen for keystroke monitoring data. Refer to the
following for valid
codes and their meanings. Codes are shown in bold and variable data is
not. Variable data is for illustration
only and may be any valid value.
CODE EXPLANATION
Ap123
Phys line 123 is connected to Rec 1.
A9
Rec 1 detected a DTMF digit 9.
a
Rec 1 is disconnected.
Bp201
Physical line 201 is connected to Rec 2.
B8 Rcc 2 detected a DTMF digit 8.
b
Rec 2 is disconnected.
K2
k2
kt
kh
kr
kx
Console Numeric pad key 2 was pressed (space after K is required).
Console Direct select key 2 was pressed.
Console Transfer key was pressed.
Console Hold key was pressed.
Console Release key was pressed.
Console page key was pressed.
Additional Codes in Version 102 and Later
$p23_15
Physical line 23 started ringing due to action from line 15.
-pl4
Physical line 14 hung-up.
+p13
Physical line 13 went from ringing to off-hook.
!p12 Physical line 12 is AAI or DIL and has detected an incoming call.
1989 Rauland-Borg Corporation (Orig. 10/88: Rev. l/89)
Page 15 of 30

Troubleshooting
TCIV TROUBLESHOOTING AND REPAIR
TCIV Find-It Fix-It
Summary: The following quick reference provides symptoms and procedures for troubleshooting them.
Just find your symptom and refer to the following procedure tom your problem. These are
tried and true find-it and fix-it methods based on a detailed list provided by Art Bickle of
Central California Electronics, Fresno Cal. Thanks from alI of us, Art!
Time Saving Hints and Suggestions
After making any program changes, use #71 to obtain the EEPROM checksum and record it.
Whenever a problem is reported, check this before doing any troubleshooting. If a user
program change has occurred, whether intentional
or not, the checksum will change and may
point out the problem. This can save lots of time, and headaches.
Use the Statistics Locations for information on how the system is performing. Be sure to zero
out any statistics after servicing the system.
System Won’t Run / Locks Up Isolate the MI0 and LLM-0 and try again (disconnect the flat cables
to any other
LLMs and speaker control boards).
Step 1.
Step 2.
Step 3.
Step 4.
Step
5.
Step 6.
Step 7.
System Will
Step 1.
Note:
Step 2.
Step
3.
Check outlet voltage and TCIV MI0 voltages +12 Vdc and +5 Vdc. A short from +5 volts to
ground can be caused by a shorted over voltage protection diode (Dl) on the CPU. This
diode protects 5 volt components on the CPU from damage by 12 volts in case of failure in
the 5 volt regulator, or a short.
Determine if the computer will talk to the TCIV. Reset the TCIV with the computer serial port
connected to the CPU connector and the communications program operating. A proper reply
is T5. If any other reply or none, suspect the CPU.
If TCN talks to computer, verify all connectors to expansion boards are secure and in proper
polarity.
Ensure all boards are properly installed and that no connector contacts are bent back.
Ensure that Location Codes and architectural number programming is per your work sheet.
A severely misadjusted RP2 pot will cause the system to lock up. Perform the adjustment pro-
cedure as described in the manual.
Use
#70 and verily the PROM version number and checksum are correct (refer to the latest
software revision sheet for proper values).
Not Program
Phone must have B:78 attributes on (7 for a display and 8 to allow programming).
Line 5 is best for a test phone because it is set-up as a display phone with each system reset.
Use
#20 to clear display and insure display integrity.
Make sure the EEPROM jumper on the CPU is set to the
ENable position.
Page 16 of 30
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)

Troubleshooting
Phone Won’t Ring
Step 1. Check the A: and B: attributes and the architectural number for the line and verify they are
correct (refer to the Programming Section).
Step 2.
Note:
Make sure pin 3 of the line hybrid is intact and the line hybrid is properly inserted.
For trunk lines, always cut pin
3 of the LLM serving a COA. Failure to do so will cause damage
to the COA.
Step
3.
The Direct Seizure Modification may be installed in Key systems with 4OOE cards. Check
wiring and ensure a common ground exists between the key system and the TCIV. Contact
Sales Engineering for more information on this modification. For new designs, consider using
the TCIV King Trip Adapter.
Step 4.
Step 5.
A faulty hybrid may be the problem, remove and replace it and then retest.
Another port may have the same architectural number, use the
#72 function to see if another
number appears (refer to the Programming Section).
Time Tones Do Not Work
Step 1.
Step 2.
Connect jumpers from the Z terminal to the zone inputs on MIO. If no time tone go to Step 3.
If the tone activates, check the master clock and ensure it activates input by going lower than
.6 vdc for .5 sec. If more than one zone, make sure the master clock activates all necessary
zones at the same time.
Step 3.
Insure programming of locations Codes for length of Time Tones (64082 through 64096) is
correct for each zone
.
Step 4. Check amplifier input level to ensure it is not turned off. Check circuit breaker on amplifier.
Step 5. If MTG is installed, try manual activation with
#ll thru #14.
All-Page
Problem
Amplifier audio in/out can be traced through MI0 relays (refer to detail on Drawing KC 1461).
Relays can be operated using the computer and monitor functions explained earlier in this
section.
Step 1. Check for output from the
LLM Port #2 and ensure the Fire Alarm Control Panel is reset, if a
USR2126 is installed.
Step 2.
Ensure the MI0 is properly seated into its rear connector and that no connector pins are
bent.
Step 3.
Step 4.
Step 5.
Check the amplifier input level control and circuit breaker.
If using an electronic key phone, make sure it allows # as a first digit.
Use the computer aided diagnostics program to check receivers for proper decoding.
1989 Rnuland-Borg Corporation (Orig. 10/88; Rev. l/89)
Page 17 of 30

Troubleshooting
Phone Rings-Back Upon Hanging Up
Step 1. User may have hook-flashed phone sometime during use and still had a trunk on soft hold
upon hanging-up.
Step 2.
If more than four beeps are heard when lifting receiver, an unanswered transfer call is
returning because the allowed timeout has expired.
System Misdials or Won’t Allow Access (Intermittent)
Step 1. There are 2 receivers in the TCIV each one decodes the tones and sends them to the CPU for
processing. If one receiver improperly decodes a digit a problem will occur only when that
receiver is used. The first phone to pick up always gets the first receiver. Use the diagnostics
in the laptop computer to check the receivers. If one is defective, replace the MIO.
Alternate Method: Temporarily turn off the Receiver Time Limit (Location Code 64012).
Leave a phone off hook to tie up one receiver and verify the remaining receiver operates by
picking up and using each key in turn to break the dial tone.
Interim solution: Lock out a receiver with software until repairs can be ma&.
Talk Path Noisy or Dead (Intermittent)
Step 1.
Use #75 diagnostic and test all 16 links in system, using a touch key to send a tone. Defects
with particular links can be further categorized as follows:
Defect on one line only: Suspect U2 or U3 on the affected LLM line.
Defect on all lines of 1 LLM: Suspect U7 or Connector 2 on the affected LLM.
Defect on multiple LLM’s:Try another source phone and check the LLM cable
from the MIO.
Step 2. Perform the Loop Check Procedure or tty replacing the LLM line hybrid Ul .
Crosstalk On Lines
Step 1.
Check wiring and ensure it is correct. All phone wiring must consist of twisted pairs to LLM T
and R terminals.
Step 2. If line amps are in use, verily the negative of the power supply is connected to TCIV common
as shown in Drawing KM0716.
Step 3. If repeater amps arc installed, verify the 28vdc power supply is grounded (negative side to
MI0 pin Z on the B strip).
Step 4. Go to the Supplementary Procedures and perform the Line Rebalancing Procedure to im-
prove the balance of TCIV lines from the typical 10% to 30% unbalance to 2% or less if the
crosstalk is associated with key phones and cables.
Note: Balance is most important where long multi-pair cables are used, such as with key systems.
Page 18 of 30
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)

Phone Rings When Call Should Go To Attendant
If an incoming call is detected while all attendant lines are busy, the TClV searches up
through physical numbers from the last Attendant line until an available administrative line
takes the call or it arrives at
the physical number of a line that is not administrative. Then it
will return to the first Attendant line and repeat the search process.
There are not enough Attendant lines to handle incoming call
traffic if overflow causes the
TCIV to send calls to administration phones other than the Attendant.
If the TCN fails to find an Attendant line or administrative phone to answer an incoming call,
it temporarily ignores the call and the caller will continue to hear ringing.
Location Code 64000 is not programmed to the proper physical number or a trunk is pro-
grammed with the A: attributes for DIL instead of
AAI.
False Call-ins After All-Call or Time Tones
step 1.
Check the amplifier gain adjustment. If too high, the amplifier will clip the signal and cause
this symptom.
Step 2.
Check each side of the amplifier to common signal ground. Make an all-call and press the
three bottom keys on the phone. Each side of the output must be within
1 volt ac of the
other. If not, a short or leakage to ground exists. Check each speaker line individually.
Alternative Method: Use the diagnostic function
#73. disconnect the VCM2 and insert
meters in its place. Advance 1 physical number at a time and check the readings.
step 3.
Step 4.
Step 5.
Check the amplifier for possible oscillations. Disconnect the amplifier input & repeat Step 2.
Perform RP2 adjustment procedure.
If the preceding steps don’t prevent the false call-ins, unplug the SC25 flat cable from the
MIO. If this eliminates
the false call-ins, plug the SC25’s in one at a time to find out which, if
any are defective.
1989 Rauland-Borg Corporation @rig. tO/88; Rev. l/89)
Page 19 of 30

Troubleshooting
Supplementary Procedures
Finding Duplicate Numbers
Summary
Architectural numbers should not be duplicated. If they are, the following symptoms may
appear.
Connections occur to speakers or phones which weren’t called.
Call-ins appear but cannot be answered or cleared.
Step 1. Dial
#72 and look-up the physical number associated with the suspect architectural number.
Step 2. Dial
#99 and change the suspect architectural number (refer to the Programming Section).
Step 3. Dial
#72 and look-up the physical number associated with the changed architectural num-
ber. If the architectural number is duplicated, a new physical number will be displayed, if not
the field will remain blank.
Step 4. Reconfigure the architectural number to physical number relationships as required.
Phone Line TAP Functions
The Comdial phones supplied with the TClV have a TAP function to help with transfers. This
is accomplished in two phases: First, the TAP function ensures that the person attempting to
transfer a call does not lose it by breaking the loop for too long; Second, that hanging-up on
one call and immediately picking-up the receiver to make another call does not initiate a
transfer. To pass this test, the timing setting of the
TClV and the built in timing of the phone
must both be correct and compatible.
Transfer Capability Test
Step 1. Dial a trunk and get C.O. dial tone; then, press TAP and verify
TCIV dial tone is received.
Repeat TAP if necessary to get dial tone.
Step 2. Dial another
TClV extension and verily double ring. If only single ringing occurs, the TCIV
interpreted the TAP as a hangup (disconnect) and one of the following actions is indicated:
Phone TAP period is too long (greater than 0.75 seconds). Replace phone.
TCIV’s hookflash time is too short (refer to Programming Section and check
location code 64014=65)
Step 3. Hang-up and repeat Step 1 and 2 five times in a row to assure repeatability.
Page 20 of 30
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)