USER
MANUAL
MODEL 2711 Series
MicroLink-T1™
T1/Fractional T1 CSU/DSU
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
http://www.patton.com
Part# 07M2711-UM
Doc# 08606U2-001,
Rev. D
Revised 10/26/06
CERTIFIED
An ISO-9001
Certified Company
Copyright © 2006
Patton Electronics Company
All Rights Reserved.
1
TABLE OF CONTENTS
Section Page
1.0 General Information...............................................................2
1.1 Warranty Statement
1.2 CE Notice
1.3 Radio and TV Interference
1.4 FCC Information
1.4.1 FCC Compliane
1.5 Industry Canada Notice
1.6 Service
2.0 General Information ..............................................................6
2.1 Features
2.2 General Product Description
2.3 Supported Applications
3.0 Configuration ........................................................................8
3.1 Configuration Using DIP Switches
3.1.1 DIP Switches SW1 - SW8
4.0 Installation ..........................................................................15
4.1 DTE Interface Connection
4.2 Network Interface Connection
4.3 Power Connection
5.0 Operation.............................................................................16
5.1 LED Descriptions
5.2 Central Office Loops
Appendix A - Specifications ........................................................19
Appendix B - Cable Recommendations......................................20
Appendix C - Factory Replacement Parts and Accessories ......21
Appendix D - Interface Pin Assignments....................................22
Appendix E - Power Supply Interface ........................................24
2
1.0 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 or problems arise
during installation or use of this product, please do not hesitate to contact Patton Electronics Technical Support at (301) 975-1007.
1.1 WARRANTY STATEMENT
Patton Electronics warrants all Model 2711 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 use only
data cables with an external outer shield bonded to a metal or metalized connector.
1.2 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). ACertificate of Compliance is available by contacting Patton
Technical Support.
WARNING! This device is not intended to be con-
nected to the public telephone network.
3
1.3 RADIO AND TV INTERFERENCE
The Model 2711 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 2711 Series has been tested and
found to comply with the limits for a Class Acomputing 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
2711 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).
1.4 FCC INFORMATION
The Model 2711 Series has been tested and registered in compliance with the specifications in Part 68 of the FCC rules. Alabel 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 2711 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 2711 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 2711 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 2711 Series is not malfunctioning.
The following information may be required when applying to your
local telephone company for leased line facilities:
Facility
Interface Service Network
Service Code Code Connection
1.544 Mbps SF format without line power 04DU9-BN 6.0N RJ48C
1.544 Mbps SF and B8ZS without line power 04DU9-DN 6.0N RJ48C
1.544 Mbps ANSI ESF without line power 04DU9-1KN 6.0N RJ48C
1.544 Mbps ANSI ESF and B8ZS w/o line power 04DU9-1SN 6.0N RJ48C
4
1.4.1 FCC Compliance:
The Model 2711 has been tested and found to comply with the
specifications found in Part 68 of the FCC rules and regulations. A
label on the equipment bears the FCC registration number. You may
be requested to provide this information to your telephone company.
The Telephone Company may decide to temporarily discontinue
your service if they believe that the Model 2711 may cause harm to the
telephone network. Whenever possible the telephone company will
attempt to notify you in advance. You have a right, if you so choose, to
file a complaint with the FCC.
In accordance with FCC rules and regulation CFR 47 68.218(b)(6),
the user must notify the telephone company prior to disconnection.
The Universal Service Order Code (USOC) is RJ48.
The Facility Interface Codes (FIC) are 04DU9-BN, 04DU9-DN, 04DU91KN, and 04DU9-1SN.
The Service Order Code (SOC) is 6.0N
1.5 INDUSTRY CANADA NOTICE :
The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets
certain telecommunications network protective , operational and safety
requirements. The Department does not guarantee the equipment will
operate to the user's satisfaction.
Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company. The equipment must also be installed using an acceptable method of connection. In some cases, the companies inside
wiring associated with a single line individual service may be extended
by means of a certified connector assembly (telephone extension
cord). The customer should be aware that compliance with the above
condition may not prevent degradation of service in some situations.
Repairs to some certified equipment should be made by an
authorized maintenance facility designated by the supplier. Any repairs
or alterations made by the user to this equipment , or equipment malfunctions, may give the telecommunications company cause to request
the user to disconnect the equipment.
Users should ensure for their own protection that the ground connections of the power utility, telephone lines and internal metallic
water pipe system, are connected together. This protection may be
particularly important in rural areas.
CAUTION: Users should not attempt to make such connections
themselves, but should contact the appropriate electric inspection
authority, or electrician, as appropriate.
5
1.6 SERVICE
All warranty and non-warranty 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 at:
tel: (301) 975-1007;
email: support@patton.com
www: http://www.patton.com.
NOTE: 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 2711. Technical Service hours: 8AM to 5PM EST,
Monday through Friday.
6
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 Services at
(301) 975-1007.
2.1 FEATURES
• Operates over 4-Wire T1 (DS1) Circuits
• Supports Unstructured Rates at 1.544 Mbps
• Supports Common Framed nx56/64 rates up to 1.536 Mbps
• Seven Easy-to-Read LED Indicators Monitor Data & Diagnostics
• Internal or Receive Loopback Clocking
• Also Works as a High-Speed Point-to-Point Modem
• Compact Size Plugs Directly into a Router, Switch or other DTE
• Made in USA
2.2 GENERAL PRODUCT DESCRIPTION
The Model 2711 Series T1 CSU/DSUs continue Patton’s tradition
of high quality,
miniature
access products. The Model 2711 Series
CSU/DSUs plug directly into the WAN port of a switch, router or multiplexer. The 2711
MicroLink T1™
supports a single T1 or FT1 connection at data rates of 1.544 Mbps (unstructured), nx64, and nx56 (n=1,
2, 3,....24). Moreover, the starting channel can be set to any value from
1 to 24.
The Model 2711 Series is easily configurable using pc-board
mounted DIP switches. Use the DIP switches to set D4 and ESF framing modes, AMI or B8ZS line coding, clocking modes, Line Build Out,
Data Rate, and starting channel. Connecting directly to the V.35 interface, the ultra-compact Model 2711 attaches without using additional
cables. Twisted-pair line connections are facilitated by a modular RJ48S jack on the rear of the unit.
Seven easy-to-read LED indicators monitor data, network, test signals, and proper setup. Model 2711 is also available for 120 VAC or
100-240 Universal Interface (UI), or even DTE Interface power operation.
7
2.3 SUPPORTED APPLICATION
The Model 2711 CSU/DSU is supplies the interface between the
telephone company and customer premises equipment (CPE) such as
a router. The 2711 can also be used as a high-speed short haul
modem for campus applications.
2.3.1 The 2711 as the Interface between the Telco and CPE
The Model 2711 Series provides the interface between the telephone company and customer equipment, such as a router or switch
(See below).
2.3.2 The 2711 as a High-Speed Short Range Modem
The Model 2711 Series can also be installed into high-speed campus applications. In this application, a pair of Model 2711 Series units
operate as short range modems (See below).
RXD
LOS
ALM
ERR
T/L
PWR
TXD
Model 2700
RXD
LOS
ALM
ERR
T/L
PWR
TXD
Model 2700
Model 2711
Model 2711s
Router
Bridge/Router
Bridge/Router
1.544Mbps
or nx56/64
1.544MBps
or nx56/64
LAN
LAN
LAN
T1
Network
8
3.0 CONFIGURATION
Before placing the Model 2711 into service, the unit must be configured to match both the DTE and Network interface parameters.
Configuration may be accomplished using pc board mounted DIP
Switches or via software using the RS-232 control port.
3.1 CONFIGURATION USING DIP SWITCHES
Configure the Model 2711 using a DIP switch package located on
the bottom side of the printed circuit board (See Figure 1, below).
The Model 2711 DIP switches can be configured as either “On” or
“Off”. Figure 2 (below) shows the orientation of the DIP switches with
respect to ON/OFF positions.
Figure 1. Model 2711 Series bottom view, showing location of DIP switches
ON
12345678
DIP Switches SW1 & SW2
12345678
ON
OFF
ON
Figure 2. Close up of DIP switches showing ON/OFF positions.
ON
OFF
12345678
ON
12345678
ON
SW2 SW1
9
3.1.1 DIP Switches SW1 - SW8
The configuration switches on the DIP switch pack will allow you to
specify data rates, line framing and coding, DSO rate, clock mode and
Line Build Out (LBO). Factory default settings of all switches are
shown in the table below.
* In unframed mode, SW2.2 is used with SW2.1 to determine the
clocking mode. In framed modes (ESF or D4) only network and internal
clocking are available. In unframed mode, where the DTE data rate is
1.544 Mbps, a third clocking option is available-external clocking, in
which the CSU derives its transmit timing source from the DTE (See
Appendix D for external timing pin data).
SWITCH SETTING SUMMARY TABLE
1.536 Mbps
(DTE Rate)
Position Function Factory Default Selected Option
SW1.8
Data Rate On
SW1.7
Data Rate On
SW1.6
Data Rate
Off
SW1.5
Data Rate Off
SW1.4
Data Rate Off
SW1.3 Starting Channel Off
SW1.2 Starting Channel Off
SW1.1 Starting Channel Off
SW2.8 Starting Channel Off
SW2.7 Starting Channel Off
SW2.6 Line Build Out Off
SW2.5 Line Build Out Off
SW2.4 Line Code Off
SW2.3 Frame Off
SW2.2 DS0 Rate/Clock* On
SW2.1 Clock Off
Starting From
Channel 1
ESF
64 kbps
Network
B8ZS
0dB
Function SW2.2 SW2.1 Clocking Mode
Don’t Care Off Network
Don’t Care On Internal
Don’t Care Off Network
Off On Internal
On On External
CLOCKING MODE
Framed Mode (ESF/D4)
Unframed Mode
10
Switches SW1.8, SW1.7, SW1.6, SW1.5 & SW1.4
These switches set the DTE date rate. Each setting represents
an nx56/nx64 setting. The chart below shows the switch settings and
the acheived DTE data rate.
MODEL 2711 DTE DATA RATE
SW1.8 SW1.7 SW1.6 SW1.5 SW1.4 DTE Data Rate
Off Off Off Off Off 1544 kbps (unframed)
Off Off Off Off On 56/64 kbps (n=1)
Off Off Off On Off 112/128 kbps (n=2)
Off Off Off On On 168/192 kbps (n=3)
Off Off On
Off Off
224/256 kbps (n=4)
Off Off On Off On 280/320 kbps (n=5)
Off Off On On Off 336/384 kbps (n=6)
Off Off On On On 392/448 kbps (n=7)
Off On Off Off Off 448/512 kbps (n=8)
Off On Off Off On 504/576 kbps (n=9)
Off On Off On Off 560/640 kbps (n=10)
Off On Off On On 616/704 kbps (n=11)
Off On On Off Off 672/768 kbps (n=12)
Off On On Off On 728/832 kbps (n=13)
Off On On On Off 784/896 kbps (n=14)
Off On On On On 840/960 kbps (n=15)
On Off Off Off Off 896/1024 kbps (n=16)
On Off Off Off On 952/1088 kbps (n=17)
On Off Off On Off 1008/1152 kbps (n=18)
On Off Off On On 1064/1216 kbps (n=19)
On Off On Off Off 1120/1280 kbps (n=20)
On Off On Off On 1176/1344 kbps (n=21)
On Off On On Off 1232/1408 kbps (n=22)
On Off On On On 1288/1472 kbps (n=23)
On On Off Off Off 1344/1536 kbps (n=24)
11
Switches SW1.1 SW1.2, SW1.3, SW 2.7 & SW2.8
These switches set the starting channel. The starting channel is
the first channel that carries valid data. This channel can be set to any
value between 1 and 24. If the starting channel is other than 1, then
the maximum possible bandwidth will be less than 1536 kbps. For
example, if the starting channel is set to be 12, then the maximum
bandwidth is limited to 13x64 kbps (channels 12~24), or 832 kbps. This
must be kept in mind when setting the starting channel. The Model
2711 will flash the ERR indicator LED if the switch setting is invalid.
Refer to section 5.1 for a more detailed explanation of the ERR LED
function.
T1 STARTING CHANNEL
T1 Starting Channel
SW1.3 SW1.2 SW1.1 SW2.8 SW2.7 (maximum value of n)
Off Off Off Off Off 1 (24)
Off Off Off Off On 2 (23)
Off Off Off On Off 3 (22)
Off Off Off On On 4 (21)
Off Off On Off Off 5 (20)
Off Off On Off On 6 (19)
Off Off On On Off 7 (18)
Off Off On On On 8 (17)
Off On Off Off Off 9 (16)
Off On Off Off On 10 (15)
Off On Off On Off 11 (14)
Off On Off On On 12 (13)
Off On On Off Off 13 (12)
Off On On Off On 14 (11)
Off On On On Off 15 (10)
Off On On On On 16 (9)
On Off Off Off Off 17 (8)
On Off Off Off On 18 (7)
On Off Off On Off 19 (6)
On Off Off On On 20 (5)
On Off On Off Off 21 (4)
On Off On Off On 22 (3)
On Off On On Off 23 (2)
On Off On On On 24 (1)
12
Switches SW2.6 & SW2.5 Line Build Out
These switches are used to set the line build out (LBO). The LBO
controls the pulse shape and attenuation of the signal sent to the network. The amount of LBO depends on the distance to the nearest
repeater. The telephone company providing the T1 service will advise
you of the required LBO setting.
SW2.6 SW2.5 LBO
Off Off 0 dB, 0-133 ft
Off On -7.5 dB
On Off -15.0 dB
On On -22.5 dB
Switch SW2.4 Line Coding
This switch is used to set the line code. There are two line coding
options available through the DIP switches: B8ZS and AMI. The line
code refers to the way that the signal-the sequence of ones and zeros
sent to the network-is encoded. AMI reverses the polarity of consecutive pulses. B8ZS is identical to AMI, except that, under certain circumstances, the alternate polarity rule is deliberately violated.
AMI: This stands for "Alternate Mark Inversion." The CSU/DSU
transmits data as a sequence of ones and zeros. Ones are
usually sent as pulses, and zeros as spaces (no pulse). In
order to maximize transmission range, every pulse is of the
opposite polarity of the preceding pulse. AMI does nothing
else. Maintaining network integrity requires a minimum pulse
density (ones desity) of the signal being transmitted on the
network. AMI does not inherently provide for this feature.
Thus, if a long sequence of zeros happen to be sent, the network may suffer. To meet this requirement using AMI requires
one of two methods: Reduce the rate of each time slot (DS0)
to 56 kbps, so that the last bit can be used to guarantee the
minimum ones density. Or, make sure that the DTE sends
data in such a way that ones density is always maintained.
For this reason, B8ZS may be preferred over AMI.
13
B8ZS: This stands for "Bipolar 8 Zero Substitution." This line code
ensures minimum ones density. Long sequences of zeros are
specially encoded. This line code allows any data pattern to
be transmiited without causing ones density problems. Thus,
it allows the use of 64 kbps timeslots.
SW2.4 Line Code
Off B8ZS
On AMI
Switch SW2.3 Line Framing
This switch is used to set the frame. There are three framing
modes available in the Model 2711 Series: ESF, D4 and Unframed.
When SW1.8~SW1.4 are turned off, the unit is set to unframed operation, and SW2.3 is ignored. Otherwise, SW2.3 is used to set the frame
to either ESF or D4.
SW2.3 Frame
Off ESF
On D4
Line Framing Options
D4/Superframe: The D4 framing format, as specified in AT&T TR62411
is the standard in which twelve frames make up a superframe. All signaling and synchronization is done in-band.
Extended Superframe: Extended Superframe, as specified in AT&T TR
54016, consists of twenty-four (24) T1 frames. The framing bits are
now used for framing, CRC and the Facility Data Link (FDL). The FDL
allows maintenance messages and information to be passed between
the 2711 and the Central Office.
14
Switch SW2.2 DS0 Channel Rate
This switch is used to set the DS0 rate in framed modes; in
unframed mode, this switch is used with SW2.1 to set the clocking
mode.
SW2.2 DS0 Rate
Off 56 kbps
On 64 kbps
Switch SW2.1 Clock Mode
This switch is used to select the timing source for transmitting data
to the network. External clocking is available only in unframed mode
(DTE data rate of 1544 kbps).
NOTE: When using the Model 2711 to terminate the telephone
company's T1 service, the 2711 must be set to network clock.
When using the Model 2711 as a high-speed short range
modem, one unit of the link must be configured for Internal
Clock mode, and the unit on the opposite end must be
configured for Network Clock mode.
Function SW2.2 SW2.1 Clocking Mode
Don’t Care Off Network
Don’t Care On Internal
Don’t Care Off Network
Off On Internal
On On External
CLOCKING AND FRAMING MODES
Framed Mode (ESF/D4)
Unframed Mode
15
4.0 INSTALLATION
The Model 2711 is equipped with a DTE, network, and power
interface. This section briefly describes connection to each.
4.1 DTE INTERFACE CONNECTION
The DTE interface is a V.35 DCE presented as an M/34 male connector. This interface is designed to plug directly into a DTE interface
(See Appendix D for V.35 interface pin assignments).
4.2 NETWORK INTERFACE CONNECTION
The Network Line Interface is an eight position keyed modular jack
configured as a RJ-48C. This interface will need to be configured to
match the line parameters (i.e. framing, line coding) supplied by the
Central Office.
NOTE: If the Model 2711 Series is being used for private short
range modem applications, the twisted pair cable connected to its
port will need to be a cross-over cable. See Appendix D for
Interface pin assignments.
4.3 POWER CONNECTION
The Model 2711 Series is powered via a supplied external transformer and is factory configured for either 120VAC or 100-240VAC
operation. This connection is via the barrel jack on the rear of the
2711. The Model 2711 can also be powered via the DTE interface
when supplied with +5VDC @ 300mA to Pin KK. See Appendix D for
more information.
DC Power Supply
The 36-60 VDC DC to DC adapter is supplied with the DC version
of the Model 2711. The black and red leads plug into a DC source
(nominal 48VDC) and the barrel power connector plugs into the barrel
power supply jack on the 2711.
16
5.0 OPERATION
Once the Model 2711 is installed and configured properly it is
ready to place into operation. This section describes the function of
the LED indicators, the use of the loopback test modes and the control
port.
5.1 LED DESCRIPTIONS
The Model 2711 Series is equipped with seven LED indicators that
monitor the status of communication. Figure 3 (below) shows the location of the LEDs on the Model 2711 Series front panel.
TXD (Transmit Data) glows green to indicate
data flow to Model 2711 from the DTE.
RXD (Receive Data) glows green to indicate data
flow from the Model 2711 to DTE.
LOS (Loss of Sync) glows red to indicate a net-
work Loss of Frame or Loss of Signal condition.
RXD
LOS
ALM
ERR
T/L
PWR
TXD
Model 2711
Figure 3. Top of Model 2711, Showing LED Indicators
To Power
Supply Jack
To -48VDC
Source
-Vin
+Vin
SWITCHING POWER SUPPLY
MODEL : SYD1106-0505
INPUT : 36-60V 0.2A MAX
OUTPUT : +5V 1.0A
OUTPUT POWER : 5W MAX
S/N: G01234567890
MADE IN CHINA BY SUNNY
Black lead (-V)
Red lead (+V)
Barrel power connector
17
ALM (Alarm) glows red to indicate that one of
several alarm conditions exist. These conditions may be local alarms or remote alarm
conditions. Alarms may occur due to:
•
Loss of Synchronization
• Loss of Frame
• AIS (Blue Alarm)
• Yellow Alarm
ERR
(Error) flashes to indicate errors. There are
several flashing patterns to indicate the type
of error.
Invalid Switch Configuration: It is possible
to request more bandwidth than is possible.
For instance, if you set the starting channel
to 12, and you select a number of timeslots
exceeding 13, the unit will not be able to
satisfy your request. In that case, the ERR
LED will flash once a second (fi second on,
fi second off). When the unit detects an
invalid setting, it will ignore the setting and
default to a full T1 (bandwidth = 24 channels, starting channel = 1). This will continue until you set the switches to a valid setting. The invalid switch configuration condition overrides other error conditions. Thus, if
•
Errored Second: In ESF or SF framing, if
the unit detects a frame error, the ERR LED
will flash briefly once a second.
•
Framing Mismatch: the ERR LED flashes
briefly once a second when framing modes
are mismatched.
•
Loss of Signal: When there is no signal
at the network interface, the ERR LED will
flash briefly once a second.
TST (Test/Loop) glows yellow to indicate that the
unit is in a test mode. The unit may be in
any one of the following modes:
• D4 Line Loop (CO initiated)
• ESF Line Loop (CO Initiated)
• ESF Payload Loop (CO Initiated)
PWR (Power) glows green to indicate that the unit
is receiving power.
18
5.2 CENTRAL OFFICE LOOPS
The 2711 also responds to central office initiated loop commands.
When in D4 framing mode, the 2711 will implement the “loop up” command when it recognizes the pattern “10000” in the data stream for a
minimum of 5 seconds. The “loop down” command is implemented by
the pattern “100” in the data stream for a minimum of 5 seconds.
When operating in ESF framing mode, loopback commands are
issued via the Facility Data Link (FDL). The line loop message will
cause a loop back before data enters the framer portion of the CSU.
The payload loop message will cause the 2711 to loop data after the
framer portion of the CSU.
The 2711 will respond to Universal Loopback Deactivate to clear
all central office loops.
19
APPENDIX A
PATTON MODEL 2711 SERIES SPECIFICATIONS
WAN Speed:
1.544 Mbps
WAN Connection: RJ-48C
Nominal Impedance: 100 Ohms
DTE Interface: Integral V.35, M/34 male or RS-422/RS-
530 (DB-25 Male)
Line Coding: AMI/B8ZS
Line Framing D4/ESF
Receive LBO: Automatic
Transmit LBO: Selectable - 0, 7.5,
15, or 22.5 dB
Clock Options: Internal, external and network clock
Diagnostics: Responds to CO initiated D4 loopup
and loopdown codes, ESF line loop
and payload loop FDL messages,
Universal Loopback De-activate message.
Standards: AT&TTR62411, ANSI T1.403, TR54016
Power Supply: 120VAC, 60 Hz to +5VDC 300mAwall-
mount transformer or UI 100-240VAC,
50 Hz to +5 VDC, 3A wall-mount transformer
Dimensions: 3.5”Lx 2.1”W x 0.78”H (9.0 x 5.3 x 1.9
cm)
20
APPENDIX B
PATTON MODEL 2711 SERIES CABLE RECOMMENDATIONS
The Patton Model 2711 Series operates at frequencies of 20kHz or
less and has been performance tested by Patton technicians using
twisted-pair cable with the following characteristics:
Wire Gauge Capacitance Resistance
19 AWG 83nf/mi or 15.72 pf/ft. .0163 Ohms/ft.
22 AWG 83nf/mi or 15.72 pf/ft. .0326 Ohms/ft.
24 AWG 83nf/mi or 15.72 pf/ft. .05165 Ohms/ft.
To gain optimum performance from the Model 2711 Series, please
keep the following guidelines in mind:
•
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)
• 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.
• Many environmental factors can affect the maximum distances
obtainable at a particular site.
21
APPENDIX C
PATTON MODEL 2711 SERIES FACTORY REPLACEMENT PARTS
AND ACCESSORIES
Patton Model # Description
2711/CM/120...................T1 Nx64 CSU/DSU(M/34 Male, 120VAC)
2711/CM/UI.....................T1 CSU/DSU (V.35 M/34 Male, UI)
07M2711..........................User Manual
22
APPENDIX D
PATTON MODEL 2711 SERIES INTERFACE PIN ASSIGNMENT
RJ-48C T1 (DS0) Network Interface
(RJ-48S Female Modular Jack)
Pin # Signal
1 RX Data (RING)
2 RX Data (TIP)
4 TX Data (RING)
5 TX Data (TIP)
}
}
From Network
To Network
23
APPENDIX D
(continued)
PATTON MODEL 2711 SERIES INTERFACE PIN ASSIGNMENT
M/34 Connector, Terminal Interface
Pin # Signal
A GND (Earth Ground/Shield)
B SGND (Signal Ground)
D CTS (DCE Source)
E DSR (DCE Source, Always On)
F CD (DCE Source)
L LL (Local Loop, DTE Source)
M TM (Test Mode Indicators, DCE Source)
N RL (Remote Loop, DTE Source)
P TD (Transmit Data +, DTE Source)
R RD (Receive Data +, DCE Source)
S TD/ (Transmit Data -, DTE Source)
T RD/ (Receive Data -, DCE Source)
U XTC (Transmit Clock +, DTE Source)
V RC (Receive Clock +, DCE Sourcce)
W XTC/ (Transmit Clock -, DTE Source)
X RC/ (Receive Clock -, DCE Source)
Y TC (Transmitter Clock +, DCE Source)
AA TC/ (Transmitter Clock -, DCE Source)
KK Aux. Power Input (+5VDC @ 300mA)
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APPENDIX E
PATTON MODEL 2711 SERIES POWER SUPPLYINTERFACE
Main 5VC power jack (J1)
Center Pin: +5VDC @ 300 mA
Outer Barrel: Ground
Auxillary Power: Supplied to Pin KK on V.35 connector
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