Dantel 44202 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
44202-0898<90-00004>
44202
202 COMPATIBLE
MODEM
About this Practice:
This practice has been reissued to:
• Replace modem alignment
procedure and Table C, in Installa-
tion section, with new procedure.
Issue date: August 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
Circuit Description ................................................................................ 2
Application Information ......................................................................... 5
Installation ............................................................................................ 6
Operation ............................................................................................. 12
Technical Specifications ....................................................................... 14
Warranty ............................................................................................. 16
44202-00
202 MODEM
A11-44202-00 REV__
ON
TEST
MON
XMT
4W
2W
LINE
MON
LINE
ON
ABL
ON
DLB
TD RD
RTS CD
DTR CTS
XMT
LEVEL
RCV
GND
RCV

PAGE 2 44202-0898<90-00004>
ORDERING INFORMATION
NOTE: This section lists the different options available for this product. To order any of the available
options, contact Dantel Inside Sales through our toll-free number, 1-800-432-6835.
OPTION NUMBER FEATURES
A11-44202-00 202 Compatible Modem
GENERAL DESCRIPTION
T
his practice describes the Dantel 44202 202 Compatible
Modem and supports installation and maintenance to the
change-out level.
This module provides Bell type 202 (4-wire) or 103 (2- or 4-wire)
data communications between distant digital equipment locations.
It also provides on-board loop-back testing and multiple data
interface inputs.
The 44202 is a plug-in P.C. board module that fits into any
400-type or similiar equipment housing. The front panel has:
♦Jacks.
♦LEDs.
♦Switches.
♦Test points.
♦Level setting potentiometers.
The are no options for the 44202 and it is not equipped to accept
subassemblies.
CIRCUIT DESCRIPTION
The 44202s functional schematic is shown is Fig. 1. The circuit
consists of:
♦Multiple data interfaces.
♦Modem IC.
♦Transformers.
♦Adjustable transmit and receive amplifiers.
♦Regulated power supply.

44202-0898<90-00004> PAGE 3
FIG.1 - FUNCTIONAL SCHEMATIC, 44202 MODEM
CIRCUIT DESCRIPTION
31 32 30 29 28 27 26 25
5 6 7 8
12 11 10
9 3 4 2 1
DTR
RTS
TD
RD CD
CTS
DSR
SIGNAL
GROUND
TX+
TX-
RTS+
RTS-
RTS+
RX-
CD+
CD-
TX+
TX-
RX+
RX-
TTL/
CMOS
RS-422
RS-485
XMT
GAIN
LO HI
1
2 3 4 5
TRANSMIT
AMP
51 40 39 41 42 49
35
17
RECEIVE
AMP
RCV
GAIN
2W S1-C 4W
2W S1-A 4W S1-B
2W 4W
21 20 19 16 15 14 13
TD
RTS
DTR
CTS
CD RD
DSR
RS-232
45 47
DLB
ALB
TTL
I/O GATING
& DRIVERS
RTS
DLB
ALB
S4
S3
S2
NO TEST TEST
T
TO
O
TO
I/O GATING
& DRIVERS
I/O GATING
& DRIVERS
I/O GATING
& DRIVERS
DTR
RTS
CD
CTS
RD
TD
MODEM
IC
+5 VDC
I/O
LOGIC
18
19 21 22
17
+5 VDC
S5
MODEM
CONFIGURATION
SELECT
XTAL
XMT
LEVEL
+5 VDC MASTER
SLAVE
XMT
- +
- +
RCV
LEVEL
MASTER
SLAVE
RCV
REGULATED
POWER
SUPPLY
-5 VDC SOURCE
+5 VDC SOURCE
-12 VDC SOURCE
+12 VDC SOURCE
NOTES: 1. Only one interface can be active at a time. Having two data interfaces active will caue sporadic operation. 2. If the RS-485 is not used, edge connector pin 4 (TD) of the 44202 must be grounded. 3. If the RS-422 interface is not used, edge connector pins 5 (TD) and 8 (RTS) must be grounded. 4. If the RS-422 interface is used but hadshaking is not reguired, edge connector pin 8 RTS) must be grounded. 5. If the RS 485 and the RS-422 interface is not used , ground pins 4, 6 and 8.
SUM & DIST. XMT
LINE
MONITOR 4W
LINE
MONITOR 2W
SUM & DIST RCV
-21 TO -56 VDC
GROUND
RCV
GND
RCV
+5 VDC
HI
LO

PAGE 4 44202-0898<90-00004>
Data Interfaces
The multiple data interfaces provide Inout/Output (IO) ports for:
♦RS-232
♦RS-422
♦RS-485
♦TTL/CMOS
Each interface has dedicated edge connector pins. The desired
interface is selected by simply connecting leads to the appropriate
pins. Each interface has all the necessary logic, gating, line
drivers, and line receivers to interface to the data equipment.
Data activity activity is indicated by LEDs for:
♦Interface Transmit (TD)
♦Interface Receive (RD)
♦Carrier Detect (CD)
♦Clear To Send (CTS)
♦Data Terminal Ready (DTR)
♦Ready To Send (RTS)
Modem IC
The modem IC is an asynchronous FSK voiceband type with
clocking oscillator and supplimentary functions for:
♦Interface control and handshaking.
♦Signal processing.
♦Digital filtration
Transformers
The transformers are 600-to-600 ohm and provide facility-side to
circuit isolation with circuit-side zener diode protection on both
four-wire and two-wire applications. The facility-side is accessed
using edge connector pins or by front panel jacks (normal-through
and monitor).
Amplifiers
The transmit and receive amplifiers are place in the facility-side
circuitry between the transformers and the modem IC. They
provide separate transmit and receive gain adjustment using
individual front panel potentiometers and 20dB High/Low gain
straps. Front panel test points are provided for setting the receive
level. The transmit level is adjustable using the front panel
monitoring jack.
CIRCUIT DESCRIPTION
NOTE:
1. No strapping is required to
choose an interface. Data interfac-
es are selected by wiring to the ap-
propriate edge connector pins.
2. Only one interface can be active
at a time. Having two interfaces
active will cause sporadic opera-
tion.
3. If the RS-485 interface is not
used, edge connector pin 4 must
be grounded.
4. If the RS-422 interface is not
used, edge connector pins 6 and 8
must be grounded.
5. If neither RS-422 or RS-485 in-
terfaces are used, edge connector
pins 4, 6, and 8 must be grounded.
6. If the RS-422 interface is used,
but handshaking is not required,
edge connector pin 8 must be
grounded.

44202-0898<90-00004> PAGE 5
Power Supply
The regulated power supply provides:
♦+5 VDC
♦-5 VDC
♦+12 VDC
♦-12 VDC
These voltages are derived from a -21 to -56 VDC input source.
CIRCUIT DESCRIPTION
APPLICATION INFORMATION
A
pplications for the 44202 202 Compatible Modem consists of
digital data transmission service between distant equipment
sites. The 44202 can be used together with other manufacturers
equipment (alarm and control, for example) for transmitting and
receiving data between remote locations and a central location,
where the need for a DC powered modem exists. The 44202 does
not need to be interfaced with another 44202. It can be interfaced
to any modem operating under one of the following standards:
♦Bell 202 (4-wire only)
♦Bell 103 (2- or 4-wire)
♦CCITT V.23 (4-wire only)
♦CCITT V.21 (2- or 4-wire)
Example Application
Refer to Fig. 2. This application has one 44202 modem at a remote
location being used to transmit 460 Alarm and Control System
data to a 49013 202 Modem subassembly at a central data process-
ing location. Because the 44202 uses a DC power source, it can
provide stable operation when supplied by a battery that is inde-
pendent of AC power interruptions. The 44202 may also be used
with a 44124 Data Channel Termination Module, which provides
data channel line conditioning

PAGE 6 44202-0898<90-00004>
APPLICATION INFORMATION
INSTALLATION
I
nstallation consists of setting the switch and strap settings,
wiring the pin connectors, installing the module in the shelf,
and checking out the module.
Switches and Straps
Strapping options are selected by on-board mini-jumpers. Switch
selections are made with a on-board slide switch, mini-DIP or
recessed front panel slide switches. Refer to Fig. 3 and Tables A
and B.
46028
Control
Point
Module
49008
RS-485
Subassy
44202
202
Compatible
Modem
46022-20
Multiple
Alarm
Combiner
49013
202
Tone
Modem
46028
Control
Point
Module
49008
RS-485
Subassy
46028
Control
Point
Module
49008
RS-485
Subassy
46020
Multiple
Alarm
Processor
Central Location Remote Location
To Alarm
Center
To Alarm
System Shelf
To Alarm
System Shelf
To Alarm
System Shelf
16 Control
Point Outputs
16 Control
Point Outputs
16 Control
Point Outputs
FIG. 2 - EXAMPLE APPLICATION, 44202 MODEM

44202-0898<90-00004> PAGE 7
FIG. 3 - STRAP AND SWITCH LOCATIONS, 44202 MODEM
TABLE A - STRAP OPTIONS, 44202 MODEM
INSTALLATION
NOTE: Both XMT and RCV Master and Slave straps must correspond.
STRAP
TD422
RTS422
TD485
XMT
RCV
POSITION
O
T
O
T
O
T
MASTER
SLAVE
MASTER
SLAVE
DESCRIPTION
No termination at 422 Transmit Data input.
180 ohm termination at 422 Transmit Data input.
No termination at 422 Request To Send input.
180 ohm termination at 422 Request To Send input.
No termination at 485 Transmit Data input.
180 ohm termination at 485 Transmit Data input.
Modem is selected as transmit master for
use in summing and distribution applications.
Modem is selected as transmit slave for
use in summing and distribution applications.
Modem is selected as receive master for
use in summing and distribution applications.
Modem is selected as receive slave for
use in summing and distribution applications.
4W 2W
T
O
T
O
T
O
S5
1234
5
XMT
RCV
SLAVE MASTER
SLAVE MASTER
HIGH
LOW
RCV GAIN
HIGH
LOW
XMT GAIN
485 TD
422 RTS
422 TD
UPDATED

PAGE 8 44202-0898<90-00004>
INSTALLATION
SWITCH
2W/4W
RTS TEST
POSITION
2W
4W
UP
DOWN
DESCRIPTION
Selects 2-wire operation
Selects 4-wire operation
Turns on RTS and DTR. Carrier is transmitted. (Switch on front panel)
Disables TEST functions.
NOTE: When RTS TEST switch is ON, RTS and DTR LEDs on front panel are ON.
SWITCH
DLB
ALB
POSITION
UP
DOWN
UP
DOWN
DESCRIPTION
Enables digital loopback (DLB) functions.
Disables DLB functions.
Enables analog loopback (ALB) functions.
Disables ALB functions.
SWITCH S5 (5-POSITION MINI DIP)
S5-1
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
S5-2
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
S5-3
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
S5-4
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
S5-5
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
DESCRIPTION
Bell 103 Originate, 300 bps, Full Duplex
Bell 103 Answer, 300 bps, Full Duplex
Bell 202, 1200 bps, Half Duplex
Bell 202, 1200 bps, w/Amplitude Equalizer
CCITT V.21, Originate, 300 bps, Full Duplex
CCITT V.21, Answer, 300 bps, Full Duplex
CCITT V.23, Mode 2, 1200 bps, Half Duplex
CCITT V.23, Mode 2, 1200 bps, Half Duplex, w/Amplitude
Equalizer
CCITT V.23, Mode 1, 600 bps, Half Duplex
Bell 202, 1200 bps
Bell 202, 1200 baud, w/ Amplitude Equalizer
CCITT V.23, Mode 1, 600 bps, w/Soft Turn-Off
Reserved
CCITT V.23, Mode 2, 1200 bps, w/Soft Turn-1
CCITT V.23, Mode 2, 1200 bps, w/Amplitude Equalizer and
Soft Turn-Off
Bell 103, Originate Loopback
Bell 103, Answer Loopback
Bell 202, Main Loopback *
Bell 202, w/Amplitude Equalizer Loopback
CCITT V.21, Originate Loopback
CCITT V.21, Answer Loopback
CCITT V.23, Mode 2, Main Loopback
CCITT V.23, Mode 2, w/Amplitude Equalizer Loopback
CCITT V.23, Mode 1, Main Loopback
CCITT V.23, Back Loopback
Bell 202
TABLE B - SWITCH SETTINGS, 44202 MODEM
* NOTE: Normal setting is for Bell 202, Main Loopback.

44202-0898<90-00004> PAGE 9
INSTALLATION
Wiring
In most cases, the 56-pin edge connector is prewired at the factory.
If custom wiring is required, refer to Fig. 4 for module edge
connector pin designations, or contact Dantel. Wire the connector
in the shelf or housing as required.
FIG. 4 - PIN DESIGNATIONS, 44202 MODEM
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
Dist. Out
Sum In
ALB
DLB
4W RCV (600 ohm); 2W XMT-RCV4W RCV (600 ohm); 2W XMT-RCV
4W XMT (600 ohm)4W XMT (600 ohm)
DTR (TTL port)RTS (TTL port)
RXD (TTL port)TXD (TTL port)
CTS (TTL port)DCD (TTL port)
DSR (TTL port)
TD (RS-232 port)
DTR (RS-232 port)RTS (RS-232 port)
Ground
DCD (RS-232 port)CTS (RS-232 port)
DSR (RS-232 port)RD (RS-232 port)
RXD- (RS-422 port)RXD+ (RS-422 port)
CD- (RS-422 port)CD+ (RS-422 port)
RTS+ (RS-422 port)RTS- (RS-422 port)
TXD+ (RS-422 port)TXD- (RS-422 port)
TXD+ (RS-485 port)TXD- (RS-485 port)
RXD- (RS-485 port)RXD+ (RS-485 port)
-21 to -56 VDC
Signal Ground

PAGE 10 44202-0898<90-00004>
INSTALLATION
CONTINUED . . .
Install Module
Disconnect power to the shelf. Install the module in the proper slot
in the equipment housing by sliding the module along the guide
slots, then firmly seating connector in its receptacle.
Checkout
Checkout of the 44202 202 Compatible Modem is done by setting
the transmit and receive levels and testing the analog and digital
circuit sides using the digital and analog loopback functions. Refer
to Fig. 5 (in the Operation section of this manual) and the
following procedure.
ALIGNMENT AND CHECKOUT PROCEDURE
Alignment
1. Action: Configure the 44202 module for the appropriate application.
Ensure that power is removed from the equipment shelf. Install the
module in the designated slot.
2. Action: Apply power to the shelf.
3. Action: Connect a Transmit Measure Set (TMS) to the XMT LINE
jack on the front panel. Configure the TMS for 600 ohm terminated
measurment. A db meter can be used to make a bridged measure-
ment by connecting to the XMT MON jack.
NOTE: The XMT MON jack does not open the jack normals and the
1200 hz tone will be transmitted to a connecting circuit,
interrupting data communication.
4. Action: Place the TEST switch in the on, or up, position.
Result: The RTS and DTR LEDs are lit. A 1200 hz tone is trans-
mitted to the test set.
NOTE: A failure in step 4 indicates a lack of power or a defective
module.
5. Action: Adjust the XMT LEVEL potentiometer to reach the engi-
neered data level. Turn clockwise to raise the level; counterclockwise
to lower the level.
NOTE: If the desired level cannot be reached, remove power from the
shelf and unplug the module. Place the XMT GAIN strap in
the HIGH position to add 20dB of gain. Replace the module,
reconnect power, and adjust the XMT LEVEL pot for the
desired level.
Result: The transmitted tone is set to the desired level.
UPDATED