Dantel 44124 User manual

CAUTION
•Install or remove modules from the shelf only when the power is off.
If you install a module in the shelf with the power on, the internal
circuitry may suffer damage and the product warranty will be void.
•Remove and install circuit boards only in a static-safe environment
(use antistatic wrist straps, smocks, footwear, etc.).
•Keep circuit boards in their antistatic bags when they are not in use.
•Do not ship or store circuit boards near strong electrostatic, electromag-
netic, magnetic, or radioactive fields.
•For more complete information on electrostatic discharge safety
precautions, refer to BellcoreTM Technical Reference # TR-NWT-000870.
Copyright 1998 by Dantel, Inc. • Dantel is a registered trademark of Dantel, Inc. • ISO 9001 Registered
Printed in the U.S.A.
INSTALLATION & OPERATION MANUAL
44124-0798 <90-00024>
44124
DATA CHANNEL
TERMINATION MODULE
About this Practice:
This practice has been reissued to:
• Update Fig. 3.
Issue date: July 1998
Reissued Practices: Updated and
new content can be identified by a
banner in the right margin.
UPDATED
Table of Contents
Ordering Information ........................................................................... 2
General Description.............................................................................. 2
Application Information ....................................................................... 2
Circuit Description ............................................................................... 3
Installation............................................................................................ 6
Operation ............................................................................................ 14
Technical Specifications ..................................................................... 15
Warranty ............................................................................................. 16

PAGE 2 44124-0798 <90-00024>
ORDERING INFORMATION
NOTE: This section lists the different options available for this product. To order any of the avail-
able options, contact Dantel Inside Sales through our toll-free number, 1-800-432-6835.
OPTION NUMBER FEATURES
B11-44124-00 Data Channel Termination
GENERAL DESCRIPTION
The 44124 Data Channel Termination Module (DCTM) is used to interface a metallic four-wire voice band/data chan-
nel line to a two-wire or four-wire modem when gain and equal-
ization control are required.
The 44124 DCTM provides:
♦Data channel line conditioning that includes:
• Impedance matching
• Selectable gain and attenuation control
• Adjustable 309B-type post equalization
♦A loopback capability that can be activated manually or by a
2713 Hz tone
♦Front panel LED indicators
The 44124 DCTM is a plug-in printed circuit module that fits
into any Dantel 400-type or similar equipment housing. It
operates on -21 to -56 VDC input power.
APPLICATION INFORMATION
The 44124 is most often used in Dantel’s 460 Alarm and Control System to interface mismatched data communication
lines between the 46033 E-System Adapter and a distant Alarm
Center. Refer to Fig. 1.

44124-0798 <90-00024> PAGE 3
FIG. 1 - EXAMPLE APPLICATION, 44124
APPLICATION INFORMATION
CIRCUIT DESCRIPTION
Afunctional schematic for the 44124 Data Channel Termina- tion Module is shown in Fig. 2. Here is a brief description of
each of the functional parts of the circuit:
Impedance Matching Transformers
Two of the impedance matching transformers (T1 and T3)
provide a switch selectable impedance of 150, 600, or 1200 ohms
(set with switch 6). The module line conditioning circuit couples
the line side receive and trasmit signals.
The drop side transformers provide a switch selectable applica-
tion of two-wire or four-wire lines (select with switch S10). Drop
side transformer impedance is fixed at 600 ohms.
Input Equalizer Circuit
The input equalizer circuit receives an incoming signal from the
impedance matching transformer (T1). The circuit adjusts slope,
bandwidth, and amplitude before the signal reaches the input
amplifier.
Set slope equalization with switches S8-1 to S8-5
♦Switch S8-1 sets the equalizer slope cable to loaded or
nonloaded.
♦Switches S8-2 to S8-5 have assigned values that determines
the total slope figure.
46020-XX
MAP
46023-1X
SMART MAC
46033-XX
ESA
44124-XX
DST
46020-XX
MAP
46023-1X
SMART MAC
460 ALARM AND CONTROL SYSTEM
DATA / TTL
1
8
RS-232
SUBASSEMBLY
EIGHT
RS-422
SERIAL PORT
DCP
TABS
MASTER
PORT
PRINTER
PORT
202 MODEM
SUBASSEMBLY
XMT OUT
RCV IN
DATA / TTL
1
8
RS-232
SUBASSEMBLY
EIGHT
RS-422
SERIAL PORT
DCP
TABS
MASTER
PORT
PRINTER
PORT
LOOPBACK
DETECT
LOOPBACK
DETECT
600 Ω
600 Ω
XMT IN
600 Ω
RCV OUT
600 Ω
RS-232
PORT TO
FMAC
NMA
TASC
ETC...
LINE
SIDE

PAGE 4 44124-0798 <90-00024>
FIG. 2 - FUNCTIONAL SCHEMATIC, 44124
13
7
41 47
9
43
1dB 2dB 4dB 8dB 1dB 2dB 4dB 8dB 1dB 2dB 4dB 8dB
1dB 2dB 4dB 8dB
49 55
15
5
MON
IN
IMPEDANCE
MATCHING
TRANSFORMER
2713 Hz LOOPBACK
DETECTOR & CONTROL
CIRCUIT
SEALING
CURRENT
SUPPLY
S6
AMBER
LED
SC
SXT
SC
S4
K2
LGLG
S2
K2
-48 VDC
S5
SXRV
NOR
SIDE B
LINE SIDE
C
SXT
SC
S4
SX
SX1
RCV
INPUT
R
T
35
17
-21 TO - 56 VDC
-BATT
GROUND
REGULATED
POWER
SUPPLY
T1
150Ω
1200Ω
600Ω
PWR
GREEN LED
INPUT EQUALIZER CIRCUIT
(ACCUMULATIVE SETTINGS)
2713 Hz LOOPBACK
DETECTOR & CONTROL
(ACCUMULATIVE SETTINGS)
INPUT AMPLIFIER CIRCUIT
(ACCUMULATIVE SETTINGS)
OUTPUT AMPLIFIER
(ACCUMULATIVE SETTINGS)
K1
LOOPBACK
RELAYS
S8 SLOPE S7 BANDWIDTH S7 AMPLIFIER (HT)
S12 LOOPBACK LEVEL S11 dB GAIN LOSS
S13
GAIN LOSS
NL
K1
T2
S1
2W 4W
.1dB .2dB .4dB .8dB 1.5dB 3dB 6dB 12dB
S1 LEVEL SETTINGS
S3
GAIN LOSS
IMPEDANCE
MATCHING
TRANSFORMER
T2
K1
S12-3
-20 VDC
RED LED
20Ω
LB
MLB
GROUND MLB (MANUAL LOOPBACK) TEK 6
LOOPBACK
19
1
23
TEK 5
21
RI/DRI RCV
OUTPUT
TI/DTI
R/DR
XMT
INPUT
T/DT
3
51
B/T2 SIMPLEX
A/T2 SIMPLEX
EQR
BYP
S9
SIDE A
DROP SIDE
MON
OUT
XMT
OUTPUT
T1
R1 T3
150Ω
1200Ω
600Ω
A to B
A to B B to A B to A
SXRV
NOR
NOR
S5
K1
NL
.1dB .2dB .4dB .8dB 1.5dB 3dB 6dB 12dB
B to A
OUT
A to B
IN/2W
NOR
CIRCUIT DESCRIPTION

44124-0798 <90-00024> PAGE 5
Set signal amplitude (height or HT) with switches S7-1 to
S7-4. Each switch has an assigned value that determines the
total signal amplitude.
Set equalizer height (HT) with switches S7-5 to S7-8. Each
switch has an assigned value that determines the total band-
width.
You can bypass the input equalizer by setting switch S9 to BYP.
Input Amplifier
The input amplifier supplies up to 24 dB of gain or loss in
0.1 dB increments.
♦Set the amplification level with switches S11-1 to S11-8.
♦Set the amplification as a gain or loss with switch S13.
Loopback and Control Circuit
The loopback and control circuit breaks the drop side receive
and transmit paths, then connects the output of the receive path
to the input of the transmit path. The loopback and control
circuit is enabled in two ways. These are listed on the next page.
♦The tone detector receives a 2713 Hz signal for at least
1.8 seconds. Tone detection provides remote testing of the
facility and its active components.
A guard circuit prevents signal frequencies near 2713 Hz
from enabling the loopback feature.
♦Set switch S12-3 to ON, or connect pin 1 to pin 19 (ground).
Set loopback amplifier gain to 0, 8, or 16 dB with switches
S12-4 and S12-5.
When the loopback and control circuit activates, the TEK 5 and
6 connection leads open and relay K2 removes the sealing
current.
The loopback and control circuit is disabled in two ways:
♦Set switch S12-2 to ON.
♦The circuit times out after 4 or 20 minutes. Set switch
S12-1 to ON for a 4 minute timeout, and OFF for a
20 minute timeout.
At the end of the timeout cycle, relay K1 is released and the
loopback and control circuit is disabled. Receive and transmit
paths reset to normal. A second 2713 Hz tone also resets the
paths.
Output Amplifier
The output amplifier supplies up to 24 dB of gain or loss in
0.1 dB increments. Set the amplification level with switches S1
and S3. The amplified output signal couples to connector pins 41
and 47 and the XMT OUT jack contacts.
CIRCUIT DESCRIPTION

PAGE 6 44124-0798 <90-00024>
Sealing Current Supply
Select the sealing current supply source with switch S2. The
source can be the facility side simplex leads from transformers
T1 and T3 or an on-board source.
Select the sealing current supply mode with switch S4. The
mode can connect simplex leads to pins 9 and 43 or to the drop
side A and B simplex leads.
A front panel LED indicates that sealing current is flowing. An
unlit LED indicates improper switching or reversed simplex lead
polarity. Set simplex lead polarity with switch S5.
Regulated Power Supply
The regulated power supply furnishes all 44124 DCTM power
requirements. It supplies sealing current when the source is
-48 VDC.
CIRCUIT DESCRIPTION
INSTALLATION
Installation consists of setting the switches, wiring for alarm acknowledgment, and installing the module in the shelf.
1. Set the switches.
To set switch options, refer to Fig. 3 and Table A.
2. Wire for alarm acknowledgment, if necessary.
Refer to Fig. 4 for module connector pin wiring assignments.
3. Install the module in the proper slot in the equipment
shelf.

44124-0798 <90-00024> PAGE 7
FIG. 3 - SWITCH LOCATIONS, 44124
TABLE A - SWITCH OPTIONS, 44124
INSTALLATION
* Default Settings Indicated
CONTINUED . . .
NOITCNUF NOITPO HCTIWS NOITISOP
ecnadepmIeniL
smho051
smho006
smho0021
6S
6S
6S
051
*006
0021
tceleSporDW4/W2 eriW-owT
eriW-ruoF
01S
01S
W2
*W4
kcabpooLzH3172 elbanE
elbasiD
2-21S
2-21S
*DTD
---
tuoemiTkcabpooLzH3172 setuniM4
setuniM02
1-21S
1-21S
*4
02
kcabpooLlaunaM delbanE
delbasiD
3-21S
3-21S
NO
*FFO
UPDATED
G
L
S2
G
L
S3
R
N
S5
S4
NOR
SXT
SC
S6
150 600 1200 S7
HT BW
OUT
IN
S8
S10
4W2W
EQR
S9
BYP
S11
S12
.1 .2 .4.8 1.5 3 6 12
L
S13
G
1 2 4 8 1 2 4 8
OPEN
ON
OPEN
ON
.1 .2 .4.8 1.5 3 6 12
1 2 4 8NL
OPEN
ON
4
DTD
81620
MLB
OPEN
OPEN
S1

PAGE 8 44124-0798 <90-00024>
TABLE A (CONTINUED) - SWITCH OPTIONS, 44124
INSTALLATION
niaGkcabpooL
Bd0
Bd8
Bd61
5&4-21S
4-21S
5-21S
4-21S
5-21S
*FFO
NO
FFO
FFO
NO
edoMxelpmiS
lacoL
noitanimreT
ssapyB
pooL
4S
4S
4S
*RON
TXS
CS
ytiraloPxelpmiS lamroN
desreveR
5S
5S
*N
R
tnerruCgnilaeS ecruoS
kniS
2S
2S
G
*L
rezilauqEtupnI ezilauqE
ssapyB
9S
9S
*RQE
PYB
elbaCepolSrezilauqE
tceleS
dedaoL
dedaolnoN
1-8S
1-8S
---
*LN
niaGleveLtupnI
tceleSssoL/
niaG
ssoL
31S
31S
G
*L
leveLtupnI
)evitalumucca,Bd(
ffollasitluafed*
1.0
2.0
4.0
8.0
5.1
0.3
0.6
0.21
1-11S
2-11S
3-11S
4-11S
5-11S
6-11S
7-11S
8-11S
NO
NO
NO
NO
NO
NO
NO
NO
niaGleveLtuptuO
tceffEssoL/
niaG
ssoL
3S
3S
G
*L
leveLtuptuO
)evitalumucca,Bd(
ffollasitluafed*
1.0
2.0
4.0
8.0
5.1
0.3
0.6
0.21
1-1S
2-1S
3-1S
4-1S
5-1S
6-1S
7-1S
8-1S
NO
NO
NO
NO
NO
NO
NO
NO
detacidnIsgnitteStluafeD*
NOITCNUF NOITPO HCTIWS NOITISOP

44124-0798 <90-00024> PAGE 9
FIG. 4 - PIN DESIGNATIONS, 44124
56 55
54 53
52 51
50 49
48 47
46 45
44 43
42 41
40 39
38 37
36 35
34 33
32 31
30 29
28 27
26 25
24 23
22 21
20 19
18 17
16 15
14 13
12 11
10 9
87
65
43
21
CIRCUIT SIDE
OF PC BOARD
COMPONENT SIDE
OF PC BOARD
RCV Input (Drop Side) TIP
A/T2 Simplex
RCV Input (Drop Side) RING
XMT Output (Line Side) TIP
SX1
XMT Output (Line Side) RING
-21 to -56 VDC
TEK 6
TEK 5
MLBG (Manual LoopBack Ground)
Ground
XMT Output (Drop Side) RING
RCV Input (Line Side) RING
SX
RCV Input (Line Side) TIP
XMT Output (Drop Side) TIP
B/T2 Simplex
MLB (Manual LoopBack)
INSTALLATION

PAGE 10 44124-0798 <90-00024>
CHECKOUT
Use the following equipment to test the 44124 DCTM:
♦A Dantel A15-00440-00 56-pin extender card or equivalent.
♦A Hewlett-Packard 3551 or equivalent voice frequency gen-
erator.
♦Test cables.
1. Mount the 44124 DCTM into the extender card.
1. Plug the card into the appropriately wired slot.
2. Set all the gain and equalization switches to OFF.
2. Use the transmission test set to record cable losses.
1. Have the distant end transmit a tone at a level of 0 dBmO.
2. Use the transmission test set programmed for bridged input level
measurement. Insert the test cord into the RCV MON jack (refer to
Fig. 5 for a 44124 DCTM front panel view). Record the cable losses
(in dB) at the receive line end for the 404 Hz, 1004 Hz, 2504 Hz,
and 3204 Hz frequencies.
3. Determine measurements and set switches.
1. Determine the difference (in dB) between cable loss measurements
at 404 Hz and 1004 Hz (the LF slope of the cable).
If the LF slope is equal to or greater than 3.0 dB, set S8-1 ON
(nonloaded cable). Set LF slope (SL) settings of switches S8-2 to
S8-5 using the Nonloaded Cable column of Table B.
If the LF slope is less than 3.0 dB, set S8-1 to OFF (loaded cable).
Set LF slope (SL) settings of switches S8-2 to S8-5 using the
Loaded Cable column of Table B.
2. Determine the difference (in dB) between cable loss measurements
at 1004 Hz and 3204 Hz (the height for the cable).
3. Set height with switches S7-1 to S7-4. Refer to Table C.
4. Determine the difference (in dB) between cable loss measurements
at 1004 Hz and 2504 Hz (the difference of the cable).
5. Set bandwidth with switches S7-5 to S7-8. Refer to Tables D and E.
4. Set gain or loss.
1. Set the input (receive) gain or loss as follows (Refer to Table A and
Fig. 3):
• Set the level meter to 600 ohms.
• Plug the test cord into the RCV OUT jack (Refer to Fig. 5).
• Have the far end transmit a 1004 Hz tone at 0 dBmO.
• Set switch S13 for gain or loss.
FIG. 5 - FRONT PANEL VIEW
INSTALLATION
CONTINUED . . .
B11-44124-00 REV__
44124-00
DATA STATION
TERMINATION
PWR
LB
SC
MON
OUT
IN/2W
MON
IN
OUT
A
T
O
B
B
T
O
A

44124-0798 <90-00024> PAGE 11
• Set switches S11-1 to S11-8 for the required level.
2. Set the output (transmit) gain or loss as follows (Refer to Table A
and Fig. 3):
• Set transmission to 600 ohms impedance.
• Plug the test cord into the IN/2W jack (Refer to Fig. 5).
• Send a 1004 Hz tone at 0 dBmO.
• Have the person at the far end measure the received level.
• Set switch S3 to gain or loss.
• Set switches S1-1 to 1-8 for the required far end receive level.
5. The procedure is complete.
♦Unplug all test cords.
♦Remove the module from the extender card.
♦Plug the module into its proper slot in the shelf or housing.
INSTALLATION
TABLE B - LF SLOPE (SL) SETTINGS FOR LOADED AND NONLOADED CABLES
NOTE: If the calculated values of Slope (SL) fall between settings, use the lower setting
indicated by the table.
LOSS AT 1004 HZ WITH 404 HZ FOR REFERENCE
LOW FREQUENCY SLOPE
(LFSL)
Loaded
Cable
(dB values)
0.00
0.35
0.85
1.35
1.65
1.90
2.05
2.20
2.35
2.50
2.60
2.65
2.70
2.75
2.80
2.85
Nonloaded
Cable
(dB values)
0.00
0.50
1.00
1.35
1.80
2.10
2.60
2.90
3.10
3.25
3.60
4.00
4.15
4.30
4.45
4.60
Reference
Total
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
S8-2(1)
ON(OUT)
OFF(IN)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
S8-3(2)
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
S8-4(4)
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
S8-5(8)
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

PAGE 12 44124-0798 <90-00024>
INSTALLATION
TABLE C - HEIGHT (HT) SETTINGS FOR 3204 HZLOSS
NOTE: If the calculated values of Height (HT) fall between settings, use the
lower setting indicated by the table.
Calculated
Loss
(dB values)
0.00
0.35
1.05
1.75
2.45
3.15
3.85
4.55
5.25
5.95
6.65
7.35
8.05
8.75
9.45
10.15
Reference
Total
OFF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
S7-1(1)
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
S7-2(2)
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
S7-3(4)
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
S7-4(8)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
LOSS AT 3204 HZ WITH 1004 HZ FOR REFERENCE
HT SETTING SWITCH

44124-0798 <90-00024> PAGE 13
TABLE D - BANDWIDTH (BW) SETTINGS FOR 2504 LOSS
INSTALLATION
NOTE: If the calculated values of Bandwidth (BW) fall
between settings, use the lower setting indicated by the table.
Reference
Total
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
S7-5(1)
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
S7-6(2)
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
S7-7(4)
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
S7-8(8)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
LOSS AT 2504 HZ WITH 1004 HZ FOR REFERENCE
BW SETTING SWITCH

PAGE 14 44124-0798 <90-00024>
INSTALLATION
TABLE E - BANDWIDTH (BW) SETTINGS FOR 2504 HZLOSS
LOSS AT 2504 HZ WITH 1004 HZ FOR REFERENCE
ACCUMULATIVE SWITCH SETTINGS S7-5 THROUGH S7-8
INSTRUCTIONS: Go down the left hand column to find the number (1 through 15) that matches the reference total amplitude
(HT) setting from Table D. Follow that row across until a figure is reached that corresponds to or is greater than the measured
bandwidth (BW) (“Checkout” section step number 10). If the BW falls between two numbers on the table, use the lesser
number. Follow that column to the top where it is headed by a number from 1 through 15. That is the reference total
bandwidth (BW) settings for switches S7-5 through S7-8 as given in Table E.
REFERENCE TOTAL BANDWIDTH (BW)
0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1
0.04
0.08
0.12
0.16
0.20
0.24
0.28
0.32
0.36
0.40
0.44
0.48
0.52
0.56
0.60
2
0.05
0.10
0.16
0.21
0.26
0.31
0.36
0.42
0.47
0.52
0.57
0.62
0.68
0.73
0.78
3
0.07
0.13
0.20
0.27
0.33
0.40
0.47
0.53
0.60
0.67
0.73
0.80
0.87
0.93
1.00
4
0.08
0.16
0.25
0.33
0.41
0.49
0.57
0.66
0.74
0.82
0.90
0.98
1.07
1.15
1.23
5
0.11
0.22
0.33
0.44
0.55
0.66
0.77
0.89
1.00
1.11
1.22
1.33
1.44
1.55
1.66
6
0.15
0.30
0.46
0.61
0.76
0.91
1.06
1.22
1.37
1.52
1.67
1.82
1.98
2.13
2.28
7
0.23
0.46
0.69
0.92
1.15
1.38
1.61
1.84
2.07
2.30
2.53
2.76
2.99
3.22
3.45
8
0.27
0.55
0.82
1.09
1.37
1.64
1.91
2.19
2.46
2.73
3.01
3.28
3.55
3.83
4.10
9
0.30
0.60
0.90
1.20
1.50
1.80
2.10
2.40
2.70
3.00
3.30
3.60
3.90
4.20
4.50
10
0.33
0.67
1.00
1.33
1.67
2.00
2.33
2.67
3.00
3.33
3.67
4.00
4.33
4.67
5.00
11
0.35
0.70
1.06
1.41
1.76
2.11
2.46
2.82
3.17
3.52
3.87
4.22
4.58
4.93
5.28
12
0.39
0.77
1.16
1.55
1.93
2.32
2.71
3.09
3.48
3.87
4.25
4.64
5.03
5.41
5.80
13
0.41
0.83
1.24
1.65
2.06
2.48
2.90
3.30
3.72
4.13
4.55
4.96
5.37
5.79
6.20
14
0.43
0.87
1.30
1.73
2.17
2.60
3.03
3.47
3.90
4.33
4.77
5.20
5.63
6.07
6.50
15
0.44
0.88
1.32
1.76
2.20
2.64
3.08
3.52
3.96
4.40
4.84
5.28
5.72
6.16
6.60
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Reference Total
Amplitude
Setting from
CHECKOUT
Section and
Table D (HT)
Total BW
Level to be Set
OPERATION
The 44124 Data Channel Termination Module operates when you apply power. For the most part, operation of the 44124
DCTM consists of observing the front panel LEDs or manually
enabling or disabling the loopback circuit.
You can manually enable the loopback circuit in two ways:
♦Set switch S12-3 to ON.
or
♦Interconnect edge connector pins 1 and 19 (ground).
The front panel of the 44124 DCTM has three LEDs (refer to
Fig. 5):
♦The green LED indicates applied power to the module.
♦The red LED indicates loopback and control circuit activity.
♦The amber LED indicates applied sealing current to the sys-
tem.

44124-0798 <90-00024> PAGE 15
TECHNICAL SPECIFICATIONS
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PAGE 16
16 PAGES 44124-0798 <90-00024>
LIMITED WARRANTY
The Seller warrants that the standard hardware products sold will be free from defects in material and work-
manship and perform to the Seller’s applicable published specifications for a period of 18 months for hardware,
and 3 months for software, from the date of the original invoice. The liability of the Seller hereunder shall be
limited to replacing or repairing, at its option, any defective products which are returned F.O.B. to the Seller’s
plant, (or, at the Seller’s option, refunding the purchase price of such products). In no case are products to be
returned without first obtaining permission and a customer return authorization number from the Seller. In
no event shall the Seller be liable for any consequential or incidental damages.
Equipment or parts which have been subject to abuse, misuse, accident, alteration, neglect, unauthorized
repair or installation are not covered by warranty. The Seller shall make the final determination as to the
existence and cause of any alleged defect. No warranty is made with respect to custom equipment or products
produced to the Buyer’s specifications except as specifically stated in writing by the Seller in the contract for
such custom equipment.
This warranty is the only warranty made by the Seller with respect to the goods delivered hereunder, and may
be modified or amended only by a written instrument signed by a duly authorized officer of the Seller and
accepted by the Buyer.
Warranty and remedies on products not manufactured by the Seller are in accordance with warranty of the
respective manufacturer. THE SELLER MAKES NO OTHER WARRANTY OF ANY KIND WHATSOEVER,
EXPRESSED OR IMPLIED; AND ALL IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PUR-
POSE WHICH EXCEEDS THE AFORESAID OBLIGATIONS IS HEREBY DISCLAIMED BY THE SELLER.
INCASE OF DIFFICULTY
If you experience difficulty with this equipment, check the following, as appropriate:
1. Switch settings
2. Signal levels
3. Software configuration
4. Connections between Dantel’s equipment and your equipment.
If there is still a problem, substitute equipment that is known to be good. For additional assistance, call
Dantel’s Technical Field Service Department weekdays, 6 A.M. to 5 P.M. pacific time:
1-800-4DANTEL(1-800-432-6835).
If a thorough checkout shows a piece of equipment has malfunctioned, you may return it to the factory. For
repairs and emergency replacements, obtain a Return Material Authorization (RMA) number from the Cus-
tomer Service Representative at 1-800-4DANTEL (1-800-432-6835).
To ensure expedient processing of your order, provide a purchase order number and shipping and billing
information when requesting an RMA number. Also, when the units are returned to Dantel, include a descrip-
tion of the failure symptoms for each unit returned. Send defective equipment to:
Dantel, Inc. • 2991 North Argyle Avenue • Fresno, California 93727-1388
P.O. Box 55013 • Fresno, CA 93747-5013 Phone [phone] Fax [phone] http://www.dantel.com
WARRANTY