USER
MANUAL
MODEL 2500RC Series
Models 2500RC, 2510RC
and 2520RC:
All-Rate CSU/DSU
Rack Mount Card
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
http://www.patton.com
Part# 07M2500RC--D
Doc# 099011U
, Rev. E
Revised 1/23/08
CERTIFIED
An ISO-9001
Certified Company
1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 2500RC Series
components to be free from defects, and will—at our option—repair or
replace the product should it fail within one year from the first date of
shipment.This warranty is limited to defects in workmanship or
materials, and does not cover customer damage, abuse, or
unauthorized modification. This product contains no serviceable parts;
therefore the user shall not attempt to modify the unit in any way. If this
product fails or does not perform as warranted, your sole recourse shall
be repair or replacement as described above. Under no condition shall
Patton Electronics be liable for any damages incurred by the use of
this product. These damages include, but are not limited to, the
following: lost profits, lost savings and incidental or consequential
damages arising from the use of or inability to use this product. Patton
Electronics specifically disclaims all other warranties, expressed or
implied, and the installation or use of this product shall be deemed an
acceptance of these terms by the user. In the event the user detects
intermittent or continuous product malfunction due to nearby high
power transmitting radio frequency equipment, the user is strongly
advised to take the following steps: use only data cables with an
external outer shield bonded to a metal or metalized connector; and,
configure the rear card as shown in section 3.3. of this manual.
1.1 RADIO AND TV INTERFERENCE
The Model 2500 Series generates and uses radio frequency
energy, and if not installed and used properly—that is, in strict
accordance with the manufacturer's instructions—may cause
interference to radio and television reception. The Model 2500 Series
has been tested and found to comply with the limits for a Class A
computing device in accordance with the specifications in Subpart J of
Part 15 of FCC rules, which are designed to provide reasonable
protection from such interference in a commercial installation.
However, there is no guarantee that interference will not occur in a
particular installation. If the Model 2500 Series does cause
interference to radio or television reception, which can be determined
by disconnecting the cables, the user is encouraged to try to correct the
interference by one or more of the following measures: moving the
computing equipment away from the receiver, re-orienting the receiving
antenna, and/or plugging the receiving equipment into a different AC
outlet (such that the computing equipment and receiver are on different
branches).In the event the user detects intermittent or continuous
product malfunction due to nearby high power transmitting radio
frequency equipment, the user is strongly advised to take the following
steps: use only data cables with an external outer shield bonded to a
metal or metalized connector; and, configure the rear card as shown in
section 3.3.1 of this manual.
2
1.4 SERVICE
All warranty and nonwarranty repairs must be returned freight
prepaid and insured to Patton Electronics. All returns must have a
Return Materials Authorization number on the outside of the shipping
container. This number may be obtained from Patton Electronics
Technical Support: (301) 975-1007; http://www.patton.com; or,
support@patton.com.
Notice: Packages received without an RMA number will not be
accepted.
Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Patton Model 2500RC. Technical Service hours: 8AM to 5PM EST,
Monday through Friday.
2.3 SUPPORTED APPLICATIONS
The Model 2500RC Series includes three units: the Model 2500RC
All-Rate CSU/DSU, the Model 2510RC Switched 56 CSU/DSU and the
Model 2520RC All-Rate/Switched 56 CSU/DSU. Depending upon the
unit selected, the Mode 2500RC Series supports three distinct modes
of operation. These are outlined in the descriptions and table below:
Dedicated DDS/Clear Channel Operation (Models 2500RC, 2520RC)
The unit can be easily configured for dedicated DDS/Clear Channel
operation by means of the dip switches on the bottom of the enclosure,
or by means of the software control port. Set the Line Rate to match
the rate of service to which you subscribe. Set the Mode switches for
Network Clocking. The Rate Converter and the Data Format options
should be set as required for your application. The remaining options
may need to be set depending on your terminal equipment and your
application.
Switched-56 Operation (Models 2510RC, 2520RC)
The unit can be used in Switched 56 applications. Set the Line
Rate to 56 Kbps. Set the Mode switches for Switched 56, and enable
Force RTS and Circuit Assurance. Dial or store a number using the
control port. The Rate Converter and the Data Format options should
be set as required for your application. The remaining options may
need to be set depending on your terminal equipment and your
application.
Campus Area Short Haul Operation (Models 2500RC, 2520RC)
The unit can also be used for campus area point-to-point short-haul
applications on private twisted-pair wires. Set the Line Rates the same
on both units. Set the Mode switch for the appropriate Transmit Clock
Mode for your application. Internal, External and Looped Clock Modes
are available. Set the remaining options as needed by your terminal
equipment or your application.
6
MODEL 2500RC SERIES APPLICATIONS
2500RC 2510RC 2520RC
Line Rate Switches All line rates 56 Kbps only All line rates
Supported Supported
Mode Switches Supports all modes Switched 56 only All modes
except Sw-56 Supported
Not Supported Supported Supported
Dialing
Commands
3.1.1 Switch Set “S1”
The configuration switches on switch set S1 allow you to specify
Line Rate, Circuit Assurance, RTS, Character Length, Data Format and
DSR Loop Status. The table below summarizes S1 switch settings,
including the factory defaults. Following the table are descriptions of
each switch setting.
Switches S1-1. S1-2 and S1-3: Line Rate
These switches control the signalling rate on the line or RJ-48S
port of the unit. They should be set to match the speed of your digital
service.
S1-1
S1-2 S1-3 Setting
On On On 2.4 Kbps
On On Off 4.8 Kbps
On Off On 9.6 Kbps
On Off Off 19.2 Kbps
Off On On 56 Kbps
Off On Off 64 Kbps
Off Off Off Force configuration
pointer to default to
Hardware Switches
(See Section 3.2)
For line rates of 56 and 64 kbps, it is possible to operate the DTE
interface at a lower rate. To do this, set these switches to 56 or 64 kbps
and set the Rate Converter/DTE Rate switches as required.
87
SWITCH SET S1 SUMMARY TABLE
56,000 bps
}
Position Function Factory Default Exceptions
S1-1 Line Rate Off
S1-2 Line Rate On
S1-3 Line Rate On
S1-4 Circuit Assurance Off Disabled
Model 2510:Enabled
S1-5 RTS Off Forced On
S1-6 Character Length Off 10-Bit
S1-7 Data Format Off Synchronous
S1-8 DSR Loop Status Off DSR Off
Switch S1-7: Data Format
The data format selection controls whether an async-to-sync
conversion is performed.
S1-7
Data Format
On Asynchronous
Off Synchronous
Switch S1-8: DSR System Status
The behavior of the DSR output during performance of a local loop
can be controlled.
DSR
S1-8 Loop Status Description
On DSR On DSR remains high (On) during the
Analog Loop
Off DSR Off DSR goes low (Off) during the
Analog Loop
3.1.2 Switch Set “S2”
The configuration switches on switch S2 control the Rate
Adapter/DTE Rate, Clock Mode, Anti-Stream Timer and RTS/CTS
Delay. The table below shows factory default settings for Switch S2.
Following the table are descriptions of each switch setting.
SWITCH SET S2 SUMMARY TABLE
Position Function Factory Default Exceptions
S2-1
Rate Adapter
Off
S2-2
Rate Adapter
Off
S2-3 Rate Adapter Off
S2-4 DTE
Loop Control
Off Disabled
S2-5 Clock
Mode
Off Off
S2-6 Clock Mode Off On
S2-7
Anti-Stream Timer
On Disabled
S2-8 RTS/
CTS Delay
Off Normal
Model 2510
Switched 56
}
Network
Clock
}
DTE Rate
}
Switch S2-7: Anti-Stream Timer
The anti-stream timer protects multidrop networks from a drop that
is continuously transmitting. If the terminal keeps RTS raised for more
than 30 seconds, the timer forces RTS off internally. This allows the
rest of the multidrop network to resume operation. The CSU/DSU
remains in the forced-off condition until the terminal drops RTS.
T
imer Value in Sec at Various Line Rates
S2-7 Timer 56 19.2 9.6 4.8 2.4
On Disabled
Off Enabled 2 4 8 15 30
Switch S2-8: RTS/CTS Delay
The RTS/CTS turn-on delay can be set to Normal or Extended.
Delay in mSec at V
arious Line Rates
S2-8 CTS Delay 56 19.2 9.6 4.8 2.4
Off Normal 0.3 0.9 1.9 3.8 7.5
On Extended 1.3 3.8 7.5 15 30
3.1.3 Setting the Reversible Interface Driver Board
The Model 2500RC Series supports both RS-232 and V.35
electrical interfaces for the terminal connection port. Which electrical
interface is active is determined by the orientation of the small
reversible daughter board on the front card (see Figure 3, below). The
daughter board is clearly marked “THIS SIDE UP FOR RS-232” and
“THIS SIDE UP FOR V.35”. Note: When plugging the daughter board
into the socket, the arrow should always point toward the front
of the
PC board.
1211
Figure 3. Closeup of Model 2500RC Interface Driver Board
ON
12345678
ON
12345678
Interface
Driver
Board
FRONT THIS SIDE UP FOR V.35
2. Power up the terminal and set its RS-232C port as follows:
9600 baud
8 data bits, 1 stop bit, no parity
local echo
CR = CR/LF on inbound data
ANSI, VT-100 emulation
3. Press [CTRL+B] on the terminal, then enter the address of the
card you wish to configure (see Section 3.1.4), and press
[RETURN]. (Note: Do
not
use the universal address [99].
Configure only
one
card at a time.) The Model 2500RC Series
Main Menu should then display on the terminal screen (see
below).
3.2.2 Using the Software Menu System
The Model 2500RC Series Menu System operates as follows:
1All
selections must be followed by [RETURN].
2 To make a selection from any menu, enter the option number
at the prompt and press [RETURN].
3. To exit any menu without making a selection, press [ESC]
followed by [RETURN]. (Note: You can also exit by just
pressing [RETURN]. However, doing this in the Store Phone
Number Menu will clear the buffer of the currently stored
number.)
For each screen described below, selecting a numbered option and
pressing [RETURN] stores that option setting and returns you to the
Software Switch Menu (Note: All lettered options must be entered in
lower case)
Line Rate
Choosing option 1 in the Software Switch Menu takes you to the
Line Rate Menu (below). This option controls the signaling rate on the
line. Set it to match the speed of your digital service. For line rates of
56 or 64 Kbps, it is possible to operate the DTE interface at a lower
rate. To do this , set the line rate to 56 or 64 Kbps. Then set the DTE
Speed as required (Software Switch Menu option 7).
Circuit Assurance
Choosing option 2 in the Software Switch Menu takes you to the
Circuit Assurance Menu (below). On dedicated (DDS) circuits, the
transmitter and the CTS output can be configured to go ON only when
a working communication circuit is established. If you use Circuit
Assurance with DDS services, enable it on only one end of the
communication link. For Switched-56 service, enable Circuit Assurance
on both ends of the circuit. When Circuit Assurance is disabled, the
transmitter and CTS operate without regard to the receiver state.
DTE Data Format
Choosing option 5 in the Software Switch Menu takes you to the
Data Format Menu (below). This option controls whether an async-tosync conversion is performed between the DTE and the Model 2500RC
Series. (Data is always transferred synchronously between two Model
2500RC Series units.) For an
asynchronous
DTE, select the
asynchronous data format
1,2
; for a
synchronous
DTE, select the
synchronous data format.
NOTE
1
: The async rate of 57.6 kbps is supported at the 56 kbps
line rate, provided the DTE equipment is configured to transmit two
stop bits. The extra stop bit reduces the DTE’s effective data rate
to allow synchronization with the 56 kbps line speed.
Set the
Model 2500RC Series for two stop bits by selecting “11 bit
character length” in the Character Length Menu.
NOTE2: You can use the Model 2500RC Series to transmit lowerspeed asynchronous data (up to 9.6 Kbps) over synchronous
circuits by simple over-sampling. To do this, select the
synchronous data format and set the line Line Rate (Software
Switch Menu option 1) to at least four times that asynchronous
data rate you wish to send. For example, use a Line Rate of 9.6
Kbps or higher for 2.4 Kbps async data.
NOTE: For DTE data rates of 56 kbps or 64 kbps, set the rate
adapter to “Line Rate = DTE Rate”, and set the Line Rate to 56 or
64 kbps, respectively. For DTE rate of 57.6 kbps, set rate adapter
to “Line Rate = DTE Rate”, set line rate to 56 kbps, set DTE for two
stop bits, and set CSU/DSU character length to “11 bits”.
DTE Loop Control
Choosing option 8 in the Software Switch Menu takes you to the
DTE Loop Control Menu (below). The local and remote loopbacks on
the Model 2500RC Series can be controlled from the DTE interface by
raising or lowering the LL and RL signals. To allow the DTE to control
these loopbacks in this manner, enable this option. Disable if you want
the Model 2500RC Series to ignore these signals.
Clock Mode
Choosing option 9 in the Software Switch Menu takes you to the
Clock Mode Menu (below).
22
RTS/CTS Delay
Choosing option “b “ in the Software Switch Menu takes you to the
RTS/CTS Delay Menu (below). This option lets you set the RTS/CTS
turn-on delay to Normal or Extended. The delay interval decreases as
the line rate increases.
3.3.1 Model 1000RCM12548 Strap Settings
Figure 7 shows strap locations for the Model 1000RMC12548
(DB-25/RJ-48S) rear cards. These straps determine various grounding
characteristics for the terminal interface and twisted pair lines.
The table below provides an overview of interface strap functions
for the rear interface cards. Following this overview is a detailed
description of each strap’s function.
DTE Shield (Pin 1) & FRGND (JB3)
In the connected position, this strap links DB-25 pin 1 & frame
ground. In the open position, pin 1 is “lifted” from frame ground.
JB3
Position 1&2 = DTE Shield (Pin 1) and FRGND Connected
Position 2&3 = DTE Shield (Pin 1) and FRGND Not Connected
24
Figure 7. DB-25/RJ-48S strap locations
JB2
(NOT USED)
JB3
(peg 1 on top)
JB4
(peg 1 on left)
INTERFACE CARD STRAP SUMMARY TABLE #1
Strap Function Position 1&2 Position 2&3
JB3 DTE Shield (Pin1) & FRGND Connected Open*
JB4 FRGND & SGND Connected Open*
26
4.0 INSTALLATION
This section describes the functions of the Model 1000R16 rack
chassis, tells how to install front and rear Model 2500RC Series cards
into the chassis, and provides diagrams for wiring the interface
connections correctly.
4.1 THE MODEL 1000R16 RACK CHASSIS
The Model 1000R16 Rack Chassis (Figure 9, below) has sixteen
short range modem card slots, plus its own power supply. Measuring
only 3.5” high, the Model 1000R16 is designed to occupy only 2U in a
19” rack. Sturdy front handles allow the Model 1000R16 to be
extracted and transported conveniently.
4.1.1 The Rack Power Supply
The power supply included in the Model 1000R16 rack uses the
same mid-plane architecture as the modem cards. The front card of
the power supply slides in from the front, and the rear card slides in
from the rear. They plug into one another in the middle of the rack.
The front card is then secured by thumb screws and the rear card by
conventional metal screws.
(continued)
Figure 9. Model 1000R16 Rack Chassis with power supply
WARNING! There are no user-serviceable parts in the
power supply section of the Model 2500RC Series.
Voltage setting changes and fuse replacement should only
be performed by qualified service personnel. Contact
Patton Electronics Technical support at (301)975-1007 for
more information.
5.0 OPERATION
Once the Model 2500RC Series unit is installed and configured
properly it is ready to operate. This section describes the function of
the LED indicators, the status displays, the use of loopback test modes,
and Switched 56 dialing procedures (Models 2510RC and 2520RC
only).
5.1 LED DESCRIPTIONS
The Model 2500RC Series is equipped with nine LED indicators that
monitor the status of communication. Figure 12 (below) shows the
location of the LEDs on the Model 2500RC Series front panel. Note
also the location of the test mode switches and RS-232 control port
(used in Switched 56 dialing as well as software configuration).
Following Figure 12 is a description of each LED’s function.
• “TD” and “RD” will glow red to indicate an Idle condition or
Binary “1” data on the respective terminal interface signals.
Green indicates Binary “0” data.
(continued)
Figure 10. The Model 2500RC Series' front panel LEDs
Model 2500RC
Power
TD
RD
OS
CTS
ER
Analog
511
Remote
511/E
CD
NS
TM
DTR
5.2.1 Displaying Configuration Settings
To display the current settings of the hardware and /or software
switches, go to the Main Menu and select item 2, “Read Configuration”.
This will take you to the Read Configuration Menu (below).
In the Read Configuration Menu, you may select item 1 to read the
hardware switch configuration or item 2 to read the software switch
configuration. A sample screens is shown below:
(continued)
LAL Test Activation
The LAL test may be activated in one of three ways:
1. Toggle the front panel “Local/Normal/Remote” switch to the
right hand side to the “Local” position.
2. Activate the LL lead from the DTE (Note: in order to use this
option, the DTE Loop Control option must be enabled–see
Section 3.2.4). If you are not sure which pin is the LL lead,
please refer to the pinout diagrams in Appendix D.
3 From a terminal, first go to the Main Menu and select item 3 to
display the Software Switch Menu (Section 3.2.4) In the
Software Switch Menu, select item “e” to go to the Local Line
Loop Menu (see below). To activate LAL, select item 1.
LAL Test Procedure
Once LAL is activated, the Model 2500RC Series transmit output is
connected to its own receiver. The “Test” LED should be lit. Follow
these steps to complete the test:
1. Verify that the data terminal equipment is operating properly
and can be used for a test. If a fault is indicated, call a
technician or replace the unit.
2. Perform a BER (bit error rate) test on each unit using a
separate BER tester (The Model 2500RC Series has a built-in
BER tester–see Section 5.4). If the BER test equipment
indicates no faults but the data terminal indicates a fault, follow
the manufacturer's checkout procedures for the data terminal.
Also, check the interface cable between the terminal and the
Model 2500RC Series.
RDL Test Procedure
Once LAL is activated, the “Test” LED should be lit. Perform a BER
(bit error rate) test on the system, using BER testers on both ends. If
the BER test equipment indicates a fault and the Local Analog
Loopback test was successful for both Model 2500RC Series units, you
may have a problem with the line between the CSU/DSUs. You should
inspect the line for proper connections.
5.3.3 Telco Testing
The digital service provider’s central office can perform CSU Loop
and DSU Loop diagnostic testing. These diagnostics allow the central
office to evaluate circuit operation without making visits to a customer’s
premises.
CSU Loop
The CSU Loop is activated when the central office reverses the DC
sealing current that flows between the TX pair and the RX pair. In this
case, the Model 2500RC Series recognizes this and loops signals on
the RX pair back to the central office on the TX pair (see Figure 13,
below). While the CSU Loop is activated by the central office, the TM
light is illuminated.
DSU Loop
The DSU Loop is activated when the central office sends a DSU
loop signal over the twisted pair wire. The Model 2500RC Series
senses this signal and loops the digital data back to the central office
(see Figure 14, below). While the DSU Loop is activated, the TM light
is illuminated.
CSUDSU Digital Network
Figure 13. CSU loop
CSUDSU
Digital Network
Figure 14. DSU loop
5.5 SWITCHED 56 DIALING COMMANDS (MODELS 2510RC &
2520RC)
To access the Switched 56 dialing capabilities of the Mode 2500RC
Series, go to the Main Menu (see Section 3.2.4) and select item 5, “Set
Switched 56 Dialing Parameters”. This will take you to the Switched 56
Menu (see below). The following paragraphs describe the commands
in the Switched 56 Menu.
Store Phone Number (Enable DTR Dialing)
Selecting item 1 in the Dial Menu lets you activate the Model
2500RC Series’ “DTR Dialing” feature by storing a phone number in the
unit’s non-volatile memory. The Model 2500RC Series automatically
dials this number when the DTE raises the DTR lead. When you issue
this command, the Model 2500RC Series responds with this prompt:
Enter up to 12 digits (without hyphens or other alphabetic characters),
followed by [RETURN]. For example: “13015551212.”
NOTE: To disable DTR dialing, press [RETURN] (and nothing
else) when asked to enter the number to be stored.
CAUTION! Pressing [RETURN] by itself will erase any
previously stored number from the unit’s non-volatile memory
and cannot be undone. This will also disable DTR dialing.
CAUTION! For proper Switched 56 operation, you must enable
the Circuit Assurance and Force RTS options as described in
Section 4.0. Failure to do so may prevent the Model 2500RC
Series unit from answering incoming Switched 56 calls.
APPENDIX A
SPECIFICATIONS
DDS Type: Dedicated
Transmission Format: Asynchronous, synchronous
Interface: RS-232 and V.35
Standards: AT&T 62310 compliant
DDS Line Rates: 2.4, 4.8, 9.6, 19.2, 56 and 64 Kbps
DTE Rates: 2.4, 4.8, 9.6, 19.2, 38.4, 56, and 64
Kbps; 57.6 Kbps, async, 2 stop bits
Control Port: Configuration and diagnostics
Transmission Line: 4-wire
Applications: DDS point-to-point or multipoint;
campus-area point-to-point
Indicators: LED indicators for TD, RD, CTS, CD,
DTR, No Signal, Out-of-Service, Error
and Test Mode
Diagnostics: V.54 compliant local and remote
loopback tests; V.52 compliant
511/511E BER test, TELCO CSU and
DSU loops
Connectors: DB-25 and M/34
Power Supply: 115V or 230V AC
Dimensions: 7.3” x 6.6” x 1.6”
38
Data
Rate
64 Kbps 7.1 4.9 3.4
56 Kbps 7.6 5.2 3.6
19.2 Kbps 8.7 6.2 4.5
9600 bps 10.4 7.7 5.8
4800 bps 13.7 10.6 9.7
2400 bps 15.1 14.2 9.1
Model 2500RC Series Distance Table (miles)
Wire Gauge
22 24 26
40
APPENDIX C
FACTORY REPLACEMENT PARTS
AND ACCESSORIES
Patton Model #
Description
10-2500RC......................DDS Cable, RJ48 - RJ48, 6 foot
10-561S...........................Control Port Cable, EIA-561, 6ft, shielded
12M-561 ..........................Adapter, EIA-561 to DB-25 Male
12F-561...........................Adapter, EIA-561 to DB-25 Female
082R2..............................Fuse 5x20mm, 200mA, 250V, Time-lag
Little Fuse P/N 239.200
1000RPEM......................120/240V Rear Power Entry Module
1000RPSM-2 ..................120/240V Front Power Supply Module
1000RPEM-DC................DC Rear Power Entry Module
1000RPSM-48A ..............48V Front Power Supply Module
1000RPEM-V ..................120/240V CE Compliant Rear Power
Entry Module
1000RPSM-V ..................120/240V CE Compliant Front Power
Supply Module
0805US ...........................American Power Cord
0805EUR.........................European Power Cord CEE 7
0805UK ...........................United Kingdom Power Cord
0805AUS.........................Australia/New Zealand Power Cord
0805DEN.........................Denmark Power Cord
0805FR............................France/Belgium Power Cord
0805IN.............................India Power Cord
0805IS.............................Israel Power Cord
0805JAP..........................Japan Power Cord
0805SW...........................Switzerland Power Cord
(APPENDIX D - Continued)
DB-25 CONNECTOR, TERMINAL INTERFACE
Pin #
Signal
1 Frame Ground
2TD
3RD
4RTS
5CTS
6DSR
7 SGND (Signal Ground)
8CD
15 TC
17 RC
18 LL (Local Loop)
20 DTR
21 RL (Remote Loop)
24 XTC
25 TM (Test Mode)
CONTROL PORT INTERFACE
8 Position modular connector compliant with EIA-561.
Pin #
Signal
4 Signal Ground
5 RD (Output)
6 TD (Input)
42
Dear Valued Customer,
Thank you for purchasing Patton Electronics products! We do
appreciate your business. I trust that you find this user manual helpful.
We manufacture one of the widest selections of data communications
products in the world including CSU/DSU's, network termination units,
powered and self-powered short range modems, fiber optic modems, interface
converters, baluns, electronic data switches, data-line surge protectors,
multiplexers, transceivers, hubs, print servers and much more. We produce
these products at our Gaithersburg, MD, USA facility, and can custom
manufacture products for your unique needs.
We would like to hear from you. Please contact us in any of the
following ways to tell us how you like this product and how we can meet your
product needs today and in the future.
Web: http://www.patton.com
Sales E-mail: sales@patton.com
Support E-mail: support@patton.com
Phone - Sales (301) 975-1000
Phone - Support (301) 975-1007
Fax: (301) 869-9293
Mail: Patton Electronics Company
7622 Rickenbacker Drive
Gaithersburg, MD 20879 USA
We are committed to a quality product at a quality price. Patton
Electronics is ISO 9001 certified. We meet and exceed the highest
standards in the industry (CE, UL, etc.).
It is our business to serve you. If you are not satisfied with any
aspect of this product or the service provided from Patton Electronics or its
distributors, please let us know.
Thank you.
Burton A.Patton
Vice President
P.S. Please tell us where you purchased this product.
_________________________________________________________
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