Patton electronic Modem 1005 User Manual

USER  
MANUAL  
MODEL 1005 and  
1005S  
Async. Carrier Sense  
Short Range Modem  
SALES OFFICE  
(301) 975-1000  
TECHNICAL SUPPORT  
(301) 975-1007  
Part #07M1005-C  
Doc. #052031UC  
Revised 4/29/98  
An ISO-9001  
Certified Company  
 
2.0 GENERAL INFORMATION  
3.0 CONFIGURATION  
Thank you for your purchase of this Patton Electronics product.  
This product has been thoroughly inspected and tested and is  
warranted for One Year parts and labor. If any questions or problems  
arise during installation or use of this product, please do not hesitate to  
contact Patton Electronics Technical Support at (301) 975-1007.  
The Model 1005 is designed to be easy to use. There are no  
internal jumpers or configuration switches to set, so there is no need to  
open the case to configure the unit (you may need to open the case for  
wire connection—refer to Section 4.0). The only configuration  
necessary for operation is proper setting of the external DCE/DTE  
switch.  
The figure below shows the location of the DCE/DTE switch on the  
PC board, as well as the location of the terminal block and surge  
suppressors (“S” model only).  
2.1 FEATURES  
• Ideal for UNIX operating systems  
• Range to 17 miles (27.2 km)  
• Data rates to 19,200 bps  
• No AC power or batteries required  
• Carrier sense handshaking  
DCE/DTE  
Switch  
Surge  
Suppressors  
• Useful for troubleshooting or monitoring a line  
• Very thin case for closely spaced computer ports  
• Available with RJ-11, RJ-45 or terminal block with strain relief  
• External DCE/DTE switch  
(1005S only)  
• Connects directly to the RS-232 port  
• Compatible with Patton Models 1000, 1004, 1009 and 1015  
• Made in USA  
Terminal  
Block  
2.2 DESCRIPTION  
The Patton Model 1005 Carrier Sense Short Range Modem  
allows RS-232 UNIX systems to communicate up to 17 miles (27.2 km)  
over two unconditioned twisted pair cable. Supporting data rates to  
19.2 Kbps, the Model 1005 requires no AC power or batteries.  
3.1 SETTING THE DCE/ DTE SWITCH  
For your convenience, the Model 1005 has an externally  
accessible DCE/DTE switch (see diagram below). If the device  
connected to the Model 1005 is a modem or multiplexer (or is wired like  
one), set the switch to “DTE”. This setting causes the Model 1005 to  
behave like Data Terminal Equipment and transmit data on pin 2.  
The Model 1005 has a unique carrier sense feature, which  
automatically detects the presence of a carrier on the line. This is  
particularly useful in UNIX environments, where the host must see a  
carrier before it sends a logon screen to the terminal. This feature also  
plays an important role in troubleshooting, where the presence or  
absence of a carrier indicates positive or negative line integrity.  
Measuring only 2.66” x 2.10” x .73” (6.76 x 5.33 x 1.85 cm), the  
Model 1005 is housed in a pop-open ABS plastic case. The Model  
1005 comes with a male or female DB-25 connector and a choice of  
interfaces (RJ-11 jack, RJ-45 jack, or terminal blocks with strain relief).  
For surge handling capability, the Model 1005S is compliant with IEC  
801.5 level 2, 1kV.  
If the device connected to the Model 1005 is a PC, terminal, or  
host computer (or is wired like one), set the switch to “DCE”. This  
setting causes the Model 1005 to behave like Data Communications  
Equipment and transmit data on pin 3.  
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4.0 INSTALLATION  
RJ- 11  
SIGNAL  
RJ- 45  
SIGNAL  
Once you have properly configured the DCE/DTE switch, you are  
ready to connect the Model 1005 to your system. This section tells you  
how to connect the Model 1005 to the twisted pair and RS-232  
interfaces, and how to operate the Model 1005.  
1----------------GND†  
2----------------RCV-  
3----------------XMT+  
4----------------XMT-  
5----------------RCV+  
6----------------GND†  
1----------------N/C  
2----------------GND†  
3----------------RCV-  
4----------------XMT+  
5----------------XMT-  
6----------------RCV+  
7----------------GND†  
8----------------N/C  
4.1 CONNECTION TO THE TWISTED PAIR INTERFACE  
The Model 1005 supports data-only communication between two  
RS-232 devices at distances to 17 (27.2 km) miles and data rates to  
19.2 Kbps. There are two essential requirements for installation:  
When connecting two Model 1005s, it is necessary to use a  
“crossover” cable. The diagram below shows how a crossover cable  
should be constructed for an environment where both Model 1005s use  
a 4-wire RJ-11 connector. Similar logic should be followed when using  
RJ-45 connectors or a combination of the two.  
1. These units work in pairs. Therefore, you must have one Model  
1005 at each end of a two twisted pair interface.  
2. To function properly, the Model 1005 needs two twisted pairs of  
metallic wire. The pairs must be unconditioned, dry metallic wire,  
between 19 and 26 AWG (the higher number gauges may limit  
distance). Standard dial-up telephone circuits or leased circuits  
that run through signal equalization equipment are not acceptable.  
SIGNAL PIN# COLOR  
COLOR  
PIN# SIGNAL  
GND†  
RCV-  
XMT+  
XMT-  
RCV+  
GND†  
1
2
3
4
5
6
Blue---------------------White  
Yellow------------------Red  
Green ------------------Black  
Red ---------------------Yellow  
Black -------------------Green  
White-------------------Blue  
6
4
5
2
3
1
GND†  
XMT-  
RCV+  
RCV-  
XMT+  
GND†  
For your convenience, the Model 1005 is available with three  
different twisted pair interfaces: RJ-11 jack, RJ-45 jack and terminal  
blocks with strain relief.  
Connection to ground is optional  
Standard color codes—yours may be different  
4.1.1 TWISTED PAIR CONNECTION USING RJ- 11 OR RJ- 45  
The RJ-11 and RJ-45 connectors on the Model 1005's twisted pair  
interface are pre-wired for a standard TELCO wiring environment (see  
Figure 1). The table on the following page shows the signal/pin  
relationships.  
4.1.2 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS  
If your RS-232 application requires you to connect two pairs of  
bare wires to the Model 1005, you will need to open the case to access  
the terminal blocks. The following instructions will tell you how to open  
the case, connect the bare wires to the terminal blocks, and fasten the  
strain relief collar in place so that the wires won't pull loose.  
1 - Blue  
1 - Blue  
2 - Orange  
3 - Black  
4 - Red  
2 - Yellow  
3 - Green  
4 - Red  
5 - Green  
6 - Yellow  
7 - Brown  
8 - Slate  
5 - Black  
6 - White  
Figure 1. AT&T standard modular color codes  
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1. Open the unit by gently inserting a screwdriver between the  
DB-25 connector and the lip of the plastic case (see below).  
You don't have to worry about breaking the plastic, but be  
careful not to bend the D-sub connector.  
4. Connect one pair of wires to XMT+ and XMT- (transmit  
positive and negative) on the terminal block, making careful  
note of which color is positive, and which color is negative.  
Once the unit has been opened, you will be able to see the  
terminal blocks located at the rear of the PC board.  
5. Connect the other pair of wires to RCV+ and RCV- (receive  
positive and negative) on the terminal block, again making  
careful note of which color is positive and which color is  
negative.  
Ultimately, you will want to construct a two pair crossover  
cable that connects the two short hauls as shown below:  
XMT +  
XMT -  
G
RCV -  
RCV +  
RCV+  
RCV -  
G
XMT -  
XMT +  
One Pair  
One Pair  
}
}
To Shield (Optional)  
6. If there is a shield around the telephone cable, it may be  
connected to “G” on the terminal block. To avoid ground  
loops, we recommend connecting the shield at the computer  
end only. A ground wire is not necessary for proper operation  
of the Model 1005.  
7. When you finish connecting the wires to the terminal block, the  
assembly should resemble the diagram below:  
2. Strip the outer insulation from the twisted pairs about one inch  
from the end.  
3. Strip the insulation on each of the twisted pair wires about .25”.  
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8. Place the 2 halves of the strain relief assembly on either side  
of the telephone wire and press together very lightly. Slide the  
assembly so that it is about 2 inches from the terminal posts  
and press together firmly. If your cable diameter is too small  
or too large for our strain relief, please contact our technical  
support. We have strain relief assemblies to accommodate  
most cable diameters.  
10. TIP the top half of the case as necessary to place it over the  
strain relief assembly. Do not snap the case together yet.  
11. Insert one captive screw through a saddle washer and then  
insert the entire piece through the hole in the DB-25 end of the  
case. Snap that side of the case closed. Repeat the process  
for the other side. This completes the cable installation  
process.  
4.2 CONNECTION TO THE RS- 232 INTERFACE  
9. Insert the strain relief assembly with the wire going through it  
into the slot in the bottom half of the modem case and set it  
into the recess in the case.  
Once you have configured the Model 1005 for DTE or DCE and  
connected the twisted pair wires correctly, simply plug the 1005 directly  
into the DB-25 port of the RS-232 device. After doing so, remember to  
insert and tighten the two captive connector screws.  
Note: If you must use a cable to connect the Model 1005 to the  
RS-232, make sure it is a straight through cable of the shortest possible  
length—we recommend 6 feet or less. The Model 1005 requires a  
cable that incorporates pins 2, 3, 4, 5, 6, 7, 8 and 20.  
4.3 OPERATING THE MODEL 1005  
Once the Model 1005 is properly installed, it should operate  
transparently—as if it were a standard cable connection. Operating  
power is derived from the RS-232 data and control signals; there is no  
“ON/OFF” switch.  
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APPENDIX A  
APPENDIX B  
PATTON MODEL 1005 SPECIFICATIONS  
PATTON MODEL 1005 CABLE RECOMMENDATIONS  
Transmission Format: Asynchronous  
The Patton Model 1005 operates at frequencies of 20kHz or less  
and has been performance tested by Patton technicians using twisted-  
pair cable with the following characteristics:  
Data Rate: 0 to 19,200 bps (no strapping)  
Control Signal: DCE Mode: CTS (Pin 5) turns ON immediately after  
the terminal raises RTS (Pin 4); DSR (Pin 6) turns on when is  
powered-up (connected); DCD (Pin 8) turns ON after detecting the  
receive signal from the line; DTE Mode: RTS (Pin 4) turns “ON”  
immediately after the modem raises CTS (Pin 5); DTR (Pin 20)  
turns "ON" after recognizing the receive signal from the line; Pins  
11, 19 and 20 are hardwired together on the DB-25 side of the  
DCE/DTE switch  
Wire Gauge  
Capacitance  
Resistance  
19 AWG/.9mm 83nf/mi or 15.72 pf/ft.  
22 AWG/.6mm 83nf/mi or 15.72 pf/ft.  
24 AWG/.5mm 83nf/mi or 15.72 pf/ft.  
.0163 Ohms/ft.  
.0326 Ohms/ft.  
.05165 Ohms/ft.  
To gain optimum performance from the Model 1005, please keep  
the following guidelines in mind:  
Transmit Line: 4-wire, unconditioned line  
Transmit Mode: Full duplex, 4-wire  
Transmit Level: 0 dBm  
Always use twisted pair wire—this is not an option.  
• Use twisted pair wire with a capacitance of 20pf/ft or less.  
• Avoid twisted pair wire thinner than 26 AWG (i.e. avoid higher  
AWG numbers than 26)  
Connection: Either a male or female DB-25  
Line Connection: RJ-11 or RJ-45 jack or 5 screw terminal posts  
(4 wires and 1 ground) and a strain relief insert  
• Use of twisted pair with a resistance greater than the above  
specifications may cause a reduction in maximum distance  
obtainable. Functionality should not be affected.  
Power Supply: No additional power required, uses ultra low power  
from EIA data and control signals; additional power can be added  
at pin 9 for +V DC when DB-25 is below the RS-232 standard  
requirements  
• Environmental factors too numerous to mention can affect the  
maximum distances obtainable at a particular site. Use “maximum  
distance” figures as a general guideline only.  
Surge Protection: Compliant with IEC 801.5 level 2, 1kV (Model  
1005S Only)  
Model 1005 Distance Table in Miles (km)  
Size: 2.66” x 2.10” x 0.73” (6.76 x 5.33 x 1.85 cm)  
Wire Gauge  
Data Rate  
(bps)  
19 AWG  
( 0.9 mm)  
24 AWG 26 AWG  
(0.5 mm) (0.4 mm)  
19,200  
9,600  
4,800  
2,400  
1,200  
6.2(10.0) 3.7(6.0) 1.2(1.9)  
7.5(12.1) 4.9(7.9) 2.5(4.0)  
8.7(14.0) 5.6(9.0) 3.7(6.0)  
11.8(19.0) 8.0(12.9) 4.9(7.9)  
17.0(27.4) 11.8(19.0) 8.0(12.9)  
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APPENDIX C  
APPENDIX D  
PATTON MODEL 1005 PIN/ SIGNAL ASSIGNMENTS  
PATTON MODEL 1005 BLOCK DIAGRAM  
DIRECTION  
STANDARD “DCE” SETTING  
DIRECTION  
1- (FG) Frame Ground  
2- (TD) Transmit Data  
To Model 1005  
3- (RD) Receive Data  
4- (RTS) Request to Send  
5- (CTS) Clear to Send  
6- (DSR) Data Set Ready  
7- (SG) Signal Ground  
From Model 1005  
To Model 1005  
From Model 1005  
From Model 1005  
To Model 1005  
Data Term. Ready (DTR) - 20  
8- (DCD) Data Carrier Detect From Model 1005  
DIRECTION  
STANDARD “DTE” SETTING  
DIRECTION  
1- (FG) Frame Ground  
2- (TD) Transmit Data  
3- (RD) Receive Data  
From Model 1005  
To Model 1005  
From Model 1005  
To Model 1005  
To Model 1005  
4- (RTS) Request to Send  
5- (CTS) Clear to Send  
6- (DSR) Data Set Ready  
7- (SG) Signal Ground  
8- (DCD) Data Carrier Detect  
From Model 1005 Data Term. Ready (DTR) - 20  
To Model 1005  
Copyright © 1998  
Patton Electronics Company  
All Rights Reserved  
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