Patton 2500RC User Manual
USER
MANUAL
MODEL 2500RC Series
Models 2500RC, 2510RC
and 2520RC:
All-Rate CSU/DSU
Rack Mount Card
CERTIFIED
An ISO-9001
Certified Company
Part# 07M2500RC--D
Doc# 099011U
Revised 1/23/08
, Rev. E
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
http://www.patton.com
TABLE OF CONTENTS
Section Page
1.0 Warranty Information .............................................................2
1.1 Radio and TV Interference
1.2 FCC Information
1.3 CE Information
1.4 Service Information
2.0 General Information...............................................................5
2.1 Product Features
2.2 General Product Description
2.3 Supported Applications
3.0 Configuration .........................................................................7
3.1 Front Card Configuration - Hardware Switches
3.2 Front Card Configuration - Software Switches
3.3 Rear Card Configuration
4.0 Installation ...........................................................................26
4.1 The Model 1000R16 Rack Chassis
4.2 Installing the Model 2500RC Series into the Chassis
4.3 Wiring the Model 2500RC Series
5.0 Operation.............................................................................28
5.1 LED Descriptions
5.2 Status Displays
5.3 Loopback Test Modes
5.4 The V.52 BER Test Pattern Generator
5.5 Switched 56 Dialing Commands (Models 2510RC & 2520RC)
Appendix A - Specifications
Appendix B - Cable Recommendations
Appendix C - Factory Replacement Parts and Accessories
Appendix D - Interface Pin Assignments
Appendix E - Transmitter Clock Source During Test Loops
1
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
1.2 FCC INFORMATION
The Model 2500 Series has been tested and registered in
compliance with the specifications in Part 68 of the FCC rules. A label
on the equipment bears the FCC registration number. You may be
requested to provide this information to your telephone company.
Your telephone company may make changes in its facilities,
equipment, operations or procedures that could affect the proper
operation of the Model 2500 Series. If this happens, the telephone
company should give you advance notice to prevent the interruption of
your service.
The telephone company may decide to temporarily discontinue
your service if they believe your Model 2500 Series may cause harm to
the telephone network. Whenever possible, they will contact you in
advance. If you elect to do so, you have the right to file a complaint
with the FCC.
If you have any trouble operating the Model 2500 Series, please
contact Patton Technical Support at (301) 975-1000. The telephone
company may ask you to disconnect the equipment from the telephone
network until the problem has been corrected or until you are certain
that the Model 2500 Series is not malfunctioning.
The following information may be required when applying to your
local telephone company for leased line facilities:
Service Digital Facility Service Order Network
T
ype Interface Code Code Jacks
2.4 Kbps Digital Interface 04DU5-24 6.0F RJ48S
4.8 Kbps Digital Interface 04DU5-48 6.0F RJ48S
9.6 Kbps Digital Interface 04DU5-96 6.0F RJ48S
56 Kbps Digital Interface 04DU5-56 6.0F RJ48S
NOTE: As of this publication date, 19.2 and 64Kbps digital
services have not been assigned Digital Facility Interface Codes.
1.3 CE NOTICE
The CE symbol on your Patton Electronics equipment indicates
that it is in compliance with the Electromagnetic Compatibility (EMC)
directive and the Low Voltage Directive (LVD) of the Union European
(EU). A Certificate of Compliance is available by contacting Technical
Support.
3 4
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.
2.0 GENERAL INFORMATION
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 arise during
installation or use of the unit, contact Patton Electronics Technical
Support: (301) 975-1007; http://www.patton.com; or,
support@patton.com.
2.1 PRODUCT FEATURES
• Operates over 4-wire dedicated digital lines
• Supports rates of 56 Kbps and 64 Kbps and all sub rates
• Supports Switched 56 dialing
• Both RS-232 and V.35 rear interface cards available
• Features V.52 and V.54 compliant tests
• Nine easy-to-read LED indicators to monitor data signals
• Internal, external or received loopback clocking
• AT&T 62310 compliant
• Can be used as a high speed modem for private twisted pair
• Fits in Patton’s rack chassis and Cluster Boxes
• Made in the USA
2.2 GENERAL PRODUCT DESCRIPTION
The Model 2500RC Series CSU/DSUs operate either
synchronously or asynchronously over 4-wire circuits up to 64 Kbps.
Rate conversion allows operation with a variety of DTE devices.
Diagnostics include V.54 and V.52 loopback tests, as well as CSU
loops. Configuration is accomplished by either internal DIP switches or
RS-232 software switches (user provides terminal). Nine easy-to-read
function card LED indicators monitor data and control signals. Two rear
interface cards are available: DB-25 and RJ-48 or M/34 and RJ-48.
The Model 2500RC Series is AT&T compliant and supports DDS,
Switched 56, Clear Channel 64 and other digital services available from
major service providers including AT&T, Sprint and MCI. Dedicated
models can also be used as a high speed modem for private twisted
pair. The Model 2500RC Series is available in standalone or in rackcard versions (only rack card versions are covered in this manual).
5
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.
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
Dialing
Commands
Not Supported Supported Supported
6
3.0 CONFIGURATION
Before you can install and operate your Model 2500RC Series
CSU/DSU, you must configure both the front and rear cards. The
Model 2500RC Series has two sets of eight switches (S1 and S2), a
reversible interface driver board and two Rotary Address switches
(MSD and LSD). The 2500RC also has software switches which may
be configured with the Patton Model 1000CC control card (not
supplied), using a VT-100 type RS-232 terminal. Rear card
configuration is accomplished by means of hardware straps.
3.1 FRONT CARD CONFIGURATION - HARDWARE SWITCHES
The Model 2500RC Series front card defaults
to the use of
hardware switches for configuration. Hardware switches consist of
two eight-position DIP switches, and two rotary switches (see Figure 1,
below).
Rotary Address
Switches
LSD
MSD
SW2
ON
12345678
SW1
ON
12345678
Interface
Driver
Board
FRONT
THIS SIDE UP FOR V.35
Figure 1. Model 2500RC Series front card, showing location of switches
The two sets of DIP switches on the Model 2500 Series are referred to
as S1, S2. As Figure 2 shows, the orientation of all DIP switches is the
same with respect to “ON” and “OFF” positions.
ON
NOTE: The ON position is oriented toward the front of the Model 1092RC.
ON
12345678
Figure 2. Close up of DIP switches showing ON/OFF positions.
OFF
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.
SWITCH SET S1 SUMMARY TABLE
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
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
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.
56,000 bps
}
Model 2510:Enabled
S1-1
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
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.
S1-2 S1-3 Setting
pointer to default to
Hardware Switches
(See Section 3.2)
87
Switch S1-4: Circuit Assurance
The transmitter and the CTS output can be configured to go On
only when a working communication circuit is established. If Circuit
Assurance is used, enable it on only one end of the communication link.
Circuit Assurance should be enabled in Switched 56 mode.
Circuit
S1-4
Assurance Description
On Enabled CTS will go low and the transmitter
will be held off if the receiver is in
the No Signal state or CD is low
Off Disabled The transmitter and CTS will
operate without regard to the
receiver state
Switch S1-5: RTS
The RTS input can be forced on, ignoring the terminal’s RTS
signal. RTS controls the transmitter by either sending the user’s data
or sending an idle code.
S1-5
RTS Description
Off Forced On An On (high) condition is trans-
mitted regardless of the state of
this unit’s RTS input
On Follows DTE The RTS input controls the
transmitter
Switch S1-6: Character Length
In asynchronous data format, 10 and 11 bit characters are
supported. This setting is ignored in synchronous data format.
Character
Character Description
S1-6 Length Start Data bits Parity Stop bits
Off 10-bit 1 8 None 1 or more
1 7 1 1 or more
1 7 None 2
On 11-bit 1 8 1 1 or more
1 9 None 1 or more
9 10
Switch S1-7: Data Format
The data format selection controls whether an async-to-sync
conversion is performed.
S1-7
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.
S1-8 Loop Status Description
On DSR On DSR remains high (On) during the
Off DSR Off DSR goes low (Off) during the
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.
Position Function Factory Default Exceptions
S2-1
S2-2
S2-3 Rate Adapter Off
S2-4 DTE
S2-5 Clock
S2-6 Clock Mode Off On
S2-7
S2-8 RTS/
Data Format
DSR
Analog Loop
Analog Loop
SWITCH SET S2 SUMMARY TABLE
Rate Adapter
Rate Adapter
Loop Control
Mode
Anti-Stream Timer
CTS Delay
Off
DTE Rate
Off
}
Off Disabled
Off Off
Network
Clock
}
On Disabled
Off Normal
Model 2510
Switched 56
}
Switches S2-1, S2-2 and S2-3: Rate Adapter/DTE Rate
The Model 2500RC Series includes a rate adapter that allows the
unit to be used with DTE devices that support rates lower than 56/64
kbps. All switch settings below are valid for line rates of 56 or 64 kbps.
S2-1
S2-2 S2-3 DTE Rate
On On On 2.4 kbps
Off On On 4.8 kbps
On Off On 9.6 kbps
Off Off On 19.2 kbps
On On Off 38.4 kbps
Off Off Off Line Rate = DTE Rate
NOTE: for DTE devices that operate at 57.6 kbps, set the Line
Rate to 56 kbps (see Section 3.1.1 4.1.1), set the rate adapter for
“Line Rate=DTE Rate”, and configure your DTE device for two
stop bits (set character length accordingly).
Switch S2-4: DTE Loop Control
The local loop and remote loop can be activated from the DTE
interface using signals “LL” and “RL”.
S2-4
On Enable LL and RL inputs
Off Disable
Switches S2-5 and S2-6: Clock Mode
The appropriate transmitter clocking modes can be selected for
Dedicated DDS, Switched-56 or campus-area (private) operation.
S2-5
S2-6 Mode Description
On Off External Clock Mode Transmit Clock
derived from terminal
interface
Off Off Network Clock Mode Transmit clock derived
(Looped Clock Mode) from the received line
signal; Use this mode
for Dedicated DDS
operation
On On Internal Clock Mode Transmit Clock
derived internally
Off On Switched 56 (Model 2510, 2520)
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.
imer Value in Sec at Various Line Rates
T
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.
ON
ON
12345678
12345678
FRONT THIS SIDE UP FOR V.35
Interface
Driver
Board
Figure 3. Closeup of Model 2500RC Interface Driver Board
1211
3.1.4 Setting Rotary Address Switches
If you plan to use the software control port to configure or dial the
Model 2500RC Series unit, you will need to configure each front card
with a unique address. This is done by using a small screw driver to
set the two rotary switches, as shown in Figure 4, below. The switches
are set individually for a number from 0 - 9, forming a two digit address
(00 - 98). Software commands set to a particular address will be
recognized by the card with that address, and ignored by other cards.
Note: Address “99” is universal. All units respond to address “99”
no matter how the rotary switches are set.
Rotary Address
Switches
LSD
MSD
ON
12345678
678
Figure 4. Setting the rotary address switches
3.2 FRONT CARD CONFIGURATION - SOFTWARE SWITCHES
The Model 2500RC Series has an internal control port that allows
software configuration. Control port signals are carried to each card in
the rack along the power bus board inside the rack chassis. Access to
all rack card control ports is provided by a single Patton Model 1000CC
control card. For instructions on installation and use of the Model
1000CC, please refer to the Model 1000CC User Manual.
3.2.1 Accessing the Software Control Port
Once you have set each Model 2500RC’s address (see Section
3.1.4), plugged each front card into the rack chassis (see Section 4.0),
and properly installed the Model 1000CC control card (see Model
1000CC User Manual), you are ready to access the Model 2500RC
Series Main Menu. Follow these steps:
1. Connect the serial RS-232C port of a VT100 terminal (or
similar RS-232 DTE with terminal emulation) to the EIA-561
control port on the Model 1000CC control card.
13 14
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
not
[RETURN]. (Note: Do
Configure only
Main Menu should then display on the terminal screen (see
below).
one
use the universal address [99].
card at a time.) The Model 2500RC Series
3.2.2 Using the Software Menu System
The Model 2500RC Series Menu System operates as follows:
1All
2 To make a selection from any menu, enter the option number
3. To exit any menu without making a selection, press [ESC]
selections must be followed by [RETURN].
at the prompt and press [RETURN].
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.)
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