Applied Systems Engineering Bell-202 User manual

Applied Systems Engineering, Inc.
SM Series Bell-202, Bell-202T, V.23 Modems
Configuration and User’s Guide
Version 1.10
Applied Systems Engineering, Inc.
1671 Dell Avenue, Suite 200
Campbell, California 95008
USA
E-mail: [email protected]
Tel: (408) 364-0500
Fax: (408) 364-0550

Applied Systems Engineering, Inc.
ii

Applied Systems Engineering, Inc.
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Property of Applied Systems Engineering, Inc.
This document and its associated distribution media contain proprietary
information of Applied Systems Engineering, Inc. and may not be used,
copied, or distributed in any form without the written permission of
Applied Systems Engineering, Inc.
Copies of this documentation may be made for internal use by the
legally licensed owner only.
© 2002 Applied Systems Engineering, Inc. All rights reserved

Applied Systems Engineering, Inc.
iv
Table of Contents
FEATURES................................................................................................................................................... 1
PACKAGING ............................................................................................................................................... 1
SWITCH SETTINGS................................................................................................................................... 2
JUMPER SETTINGS FOR BOX MOUNT (5006) MODEM (REV C)................................................... 3
JUMPER SETTINGS FOR RACK MOUNT (5008) MODEM (REV C)................................................ 4
POWER CONNECTION ............................................................................................................................ 5
RJ-11 CABLING .......................................................................................................................................... 5
RS-232 CABLING........................................................................................................................................ 5
COMMON PROBLEMS AND SOLUTIONS ........................................................................................... 5
PRODUCT CODES...................................................................................................................................... 6
DIAGRAM: RACK MOUNT MODEM BOARD ..................................................................................... 7
DIAGRAM: BOX MOUNT MODEM BOARD ........................................................................................ 8
DIAGRAM: RACK MOUNT ENCLOSURE BACKPLANE .................................................................. 9

Applied Systems Engineering, Inc.
Page 1
Features
Power
•5 VDC or 12 to 160 VDC, draws less than 500 mw
•Power cable can be removed/inserted with power on
•"Hot Card Swap" on rack mount configuration
Timings
•Carrier detect on delay: 2 to 30 msec.
•RTS/CTS delay: 0 to 254 msec. or constant CTS
Levels
•Transmit Gain: 0 to –31 dB, switch selectable, 1dB increments
•Receiver Gain: –35 or -45 dB, switch selectable
Isolation
•1,500 VAC Telco
•1,800 VAC Power Supply
LEDs
•LEDs for transmit (TD) and receive (RD) data, RTS, CTS, carrier detect (CD), and power
Connections
•Analog side via 4-wire RJ-11
•Digital side via DB-25 RS-232
Other
•2-wire or 4-wire (2-wire with optional 156 msec. receiver squelch)
•Constant or switched carrier
•900Hz soft carrier turn-off
Packaging
The modem dimension is based on a VME form-factor PC card (100 x 160mm) that can be mounted in an
optional metal box (Model 5006), inserted into a VME-style rack (Model 5008), or mounted in a customer
enclosure (Model 5006) with 4 4-40 screws. The metal box dimensions are 7.35 x 4.14 x 1.42” (187 x 105
x 36 mm) and include flanges with 4 mounting holes. For the rack mount version, power is provided
through the backplane connector. For the Model 5006, power connection is via a 3-position terminal block.

Applied Systems Engineering, Inc.
Page 2
Switch Settings
•Settings Apply to Both Rack Mount (5008) and Box Mount (5006) Modem
•Bold Italics indicates factory settings
Switch Usage Notes Position Value if ON
1 -1 dB
2 -2 dB
3 -4 dB
SW1 Transmit gain •0 to –31 dB
•Add values for all switches in the ON position and add
0 to sum of switch values if JP7 is installed and add
–16 if JP7 is removed. 4 -8 dB
JP7 JP7 (See Jumper Settings) installed
1 2 msec
2 4 msec
3 8 msec
CD On Delay •Delay in setting RS-232 “CD” signal after carrier is
detected, 2 to 30 milliseconds
•Add values for all switches in the ON position
•At least one switch must be ON 4 16 msec
5 1 msec
6 2 msec
7 4 msec
SW3
900Hz soft-
carrier turn-off
•Soft-carrier turnoff duration, 1 to 15 milliseconds
•Add values for all switches in the ON position.
•At least one switch must be ON
8 8 msec
1 0 msec
2 2 msec
3 4 msec
4 8 msec
5 16 msec
6 32 msec
7 64 msec
SW4 RTS/CTS •Delay between requesting RTS and granting CTS, 0 to
254 milliseconds or constant
•If switch 1 is OFF, add values for all switches (2 to 8)
in ON position.
•If all switches are OFF, CTS is constantly enabled
8 128 msec

Applied Systems Engineering, Inc.
Page 3
Jumper Settings for Box Mount (5006) Modem (Rev E)
•Bold Italics indicates factory settings
Jumper Usage Notes Jumper Meaning
1-2 DTR
JP1 DTR/DSR
•Uses DTR as “clear-to-send” signal, instead of CTS
•Uses DSR as “request-to-send” signal instead of RTS
•Normal mode (RTS/CTS) has no jumpers installed 3-4 DSR
1-2 -45 dBJP2 Receiver
gain
•Sets receiver gain to –35 or –45 dB
•Exactly one jumper must be installed 3-4 -35 dB
JP3 Receiver
squelch
•For half duplex mode, adds 156 millisecond delay between
end of transmitted message and enabling receiver
•Receiver constantly enabled if not installed
1-2 156 msec
1-2
3-4 2-wire
5-6
JP4 2W/4W
•Selects 2-wire (half duplex) or 4-wire (full-duplex) operation
•Exactly 2 jumpers must be installed
7-8 4-wire
JP5 Carrier
•Selects switched or constant carrier
•Remove jumper for switched carrier 1-2 Removed
JP6 900Hz soft
carrier
turn-off
•Installed if 900Hz-carrier turn-off is not required.
•Removed if 900Hz-carrier turn-off is required.
•Note: Must be installed for V.23 CCITT operation
1-2 Installed
JP7 Transmit
level range
selection
•If installed, SW1 settings interpreted as 0 to –15 dB
•If removed, SW1 settings interpreted as –16 to –31 dB 1-2 Installed
1-3
2-4 5V
3-5
JP8 Power
Supply
•If 1-3 and 2-4, input power must be regulated 5 VDC
•If 3-5 and 4-6, input power can be 12 to 160 VDC
4-6
12-160 V
3-5
JP9 Reserved
•These jumpers are factory installed and must not be altered
after shipment. 4-6
Installed
JP10 Earth •Jumper inserted connects (-) power input to (S) shield on
terminal block 1-2 Removed

Applied Systems Engineering, Inc.
Page 4
Jumper Settings for Rack Mount (5008) Modem (Rev A)
•Bold Italics indicates factory settings
Jumper Usage Notes Jumper Meaning
1-2 DSR
JP1 DTR/DSR
•Uses DTR as “clear-to-send” signal, instead of CTS
•Uses DSR as “request-to-send” signal instead of RTS
•Normal mode (RTS/CTS) has no jumpers installed 3-4 DTR
1-2 -45 dBJP2 Receiver
gain
•Sets receiver gain to –35 or –45 dB
•Exactly one jumper must be installed 3-4 -35 dB
JP3 Receiver
squelch
•For half duplex mode, adds 156 millisecond delay between
end of transmitted message and enabling receiver
•Receiver constantly enabled if not installed
1-2 156 msec
1-2
3-4 2-wire
5-6
JP4 2W/4W
•Selects 2-wire (half duplex) or 4-wire (full-duplex) operation
•Exactly 2 jumpers must be installed
7-8 4-wire
JP5 Carrier
•Selects switched or constant carrier
•Remove jumper for switched carrier 1-2 Removed
JP6 900Hz
soft
carrier
turn-off
•Installed if 900Hz-carrier turn-off is not required.
•Removed if 900Hz-carrier turn-off is required.
•Note: Must be installed for V.23 CCITT operation
1-2 Installed
JP7 Transmit
level
range
selection
•If installed, SW1 settings interpreted as 0 to –15 dB
•If removed, SW1 settings interpreted as –16 to –32 dB 1-2 Installed
3-5
JP9 Reserved
•These jumpers are factory installed and must not be altered
after shipment. 4-6
Installed

Applied Systems Engineering, Inc.
Page 5
Power Connection
View the end of the board with the RJ-11 connector at your left and the three-position power connector at
your right. The three power connector pins are as follows:
Location Pin Label Description
Leftmost 1 + Power Positive
Middle 2 - Power Negative (return)
Rightmost 3 S Earth ground (not normally used)
RJ-11 Cabling
The standard RJ-11 jack terminates in 4 spade lugs. The following table contains the cabling options for
both 4-wire and 2-wire operation.
RJ-11 Cable 4-wire mode (full duplex) 2-wire mode (half duplex)
Red
Green
Transmit Transmit/Receive
Yellow
Black
Receive Unused
RS-232 Cabling
The following table itemizes RS-232 pins utilized. Pins not listed are not used.
Pin Description Pin Description
1 Frame Ground 5 Clear To Send (CTS)
2 Transmit Data (TD) 7 Signal Ground
3 Receive Data (RD) 8 Carrier detect (CD)
4 Request To Send (RTS)
Common Problems and Solutions
Description of Problem Recommended Solution
Messages sent by the ASE modem are
not received at the other modem
Make sure that the RTS/CTS time (SW4) on the ASE modem
is longer than the carrier detect time on the other modem.
Messages sent by another modem are not
received at the ASE modem
Make sure that the RTS/CTS time on the other modem is
longer than the “CD On Delay” time (SW3) on the ASE
modem.
Frequent communication errors in
messages received at non-ASE modem
The ASE modem supports two methods for disabling the
carrier, selected by the jumper at JP6. Try the alternate setting.

Applied Systems Engineering, Inc.
Page 6
Product Codes
Product codes are of the form SM-MMM-P-K
202 Bell-202 B PC board only
MMM Modem
type V23 V.23 CCITT V
VME chassis
mounting bracket
I 12 to 160 VDC
P Power
Option X 5 VDC
KPackaging
M Metal box
For example:
SM-202-X-V specifies a Bell-202 modem with the 5 V power option and VME mounting bracket.

Applied Systems Engineering, Inc.
Page 7
Diagram: Rack Mount Modem Board
JP2
JP9
Loopback
Switch
RTS
CTS
TX
RX
CD
PWR
Jumper and Switch Locations
Models SM-202-X-V
Models SM-V23-X-V
Applied Systems Engineering, Inc
Revision 1
March 12, 2002
Single Channel Modem
File: \\wsw\c\drawings\SingChanModemRevA-Rack.vsd
Rack Mount Enclosure
SW4
1
8
7
6
5
4
3
2
JP5
SW3
1
8
7
6
5
4
3
2
1
65
2
43
SW1
1
4
3
2
Part: AD341-5008, Revision A
JP6
JP7
JP3
1
24
3
JP1
1
24
3
JP4
3751
4628

Applied Systems Engineering, Inc.
Page 8
Diagram: Box Mount Modem Board
JP9 DB25
Serial Connection
RJ11
Connection
Power
Connection
Loopback
Switch
RTS
CTS
TX
RX
CD
PWR
Jumper and Switch Locations
Models SM-202-x-M, SM-202-x-B
Models SM-V23-x-M, SM-V23-x-B
Models SM-202-I-V, SM-V23-I-V
Applied Systems Engineering, Inc
Dwg: Revision 4
September 12, 2002
Single Channel Modem
File: \\wsw\c\drawings\SingChanModemRevE.vsd
Box Mount Enclosure or Board Only
8
1
65
2
43
Part: AD341-5006, Revision E
SW4
1
8
7
6
5
4
3
2
JP5
SW3
1
8
7
6
5
4
3
2
JP4
3751
462
SW1
1
4
3
2
JP2
12
43
JP3
JP6
JP7
JP1
12
43
JP8
1
6
5
24
3
JP10
S

Applied Systems Engineering, Inc.
Page 9
Diagram: Rack Mount Enclosure Backplane
Communication Line
and
Power Connections
Models SM-202-X-V
Models SM-V23-X-V
Applied Systems Engineering, Inc
Revision 4
March 12, 2002
Single Channel Modem
Notes:
None
File: \\wsw\c\drawings\SingChanModemRevC-Chassis.vsd
Rack Mount Enclosure
Backplane Connections
RX- RX+ TX+TX-
Transmit Data +
Receive Data -
Receive Data +
Transmit Data -
DB-25 Female
Screw
Down
Connection
Rear View
Logic Ground
+ 5 Volts
AC Low (Neutral)
Earth Ground
AC High (Hot)
(115 Volt AC Section)
(5 Volt DC Section)
+5VA GND B +5VB
PS 1 PS 2
Ground Power Supply 1
+ 5 Volts Power Supply 2
Ground Power Supply 2
+ 5 Volts Power Supply 1
GND A
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
RX- RX+ TX+TX-
GND A +5VA GND B +5VB
GND GND
+5V
A
+5V
B
This manual suits for next models
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Table of contents