USER
MANUAL
MODEL 1088/K
mDSL Modem with fixed
G.703/G.704 Interface
Part# 07M1088/K-B
Doc# 033141UB
Revised 02/22/00
SALES OFFICE
(301)975-1000
TECHNICAL SUPPORT
(301)975-1007
http://www.patton.com
An ISO-9001
Certified
Company
TTAABBLLEE OOFF CCOONNTTEENNTTSS
Section Page
1.0 Warranty Information.............................................................2
1.1 Radio and TV Interference
1.2. CE Notice
1.3 Service
2.0 General Information ...............................................................4
2.1 Features
2.2 Description
3.0 Configuration .........................................................................5
3.1 Configuring the Hardware DIP Switches
3.1.1 Configuration DIP Switch Set “S1”
3.1.2 Configuration DIP Switch Set “S2”
3.2 NetLink Plug ‘n’ Play
4.0 Installation ...........................................................................13
4.1 Connect G.703 Network
4.2 Jumper Configuration
4.2.1 Connect Twisted Pair (120 ohm) to G.703 Network
4.2.2 Connect Dual Coaxial Cable (75 ohm) to G.703 Network
4.3 Connect Twisted Pair DSL Interface
4.4 Power Connection
5.0 Operation.............................................................................18
5.1 Power-Up
5.2 LED Status Monitors
5.3 Test Modes
5.3.1 Overview
5.3.2 Loops and Patterns
5.3.3 Using the V.52 (BER) Test Pattern Generator
Appendix A - Specifications........................................................29
Appendix B - Factory Replacement Parts and Accessories.......30
Appendix C - Transmission Distance Chart ...............................31
Appendix D - Led Descriptions....................................................32
1
11..00 WWAARRRRAANNTTYY IINNFFOORRMMAATTIIOONN
Patton Electronics warrants all Model 1088 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. 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.
1.1 RADIO AND TV INTERFERENCE
The Model 1088 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 1088 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 1088 does
cause interference to radio or television reception, which can be determined by disconnecting the unit, 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).
1.2 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 European Union
(EU). A Certificate of Compliance is available by contacting Technical
Support.
2
1.3 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 Service at:
tel: (301)975-1007
email: support@patton.com
www: http://www.patton.com
Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 1088. Technical Service hours: 8AM to 5PM EST, Monday
through Friday.
3
22..00 GGEENNEERRAALL IINNFFOORRMMAATTIIOONN
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.
2.1 FEATURES
• Multi-Rate Symmetric DSL
• Supports DTE Speeds from 64 kbps to 2.048 Mbps
• 2-wire Operation
• 120 ohm (RJ-45)
and
75 ohm (dual coax) G.703/G.704 termina-
tions
• 2Mbps G.703 Clear Channel (Unframed) or nx64 G.704 (Framed)
Operation
• SNMP Manageable as the CP (Customer Premises) modem when
connect to Model 1095RC
• Selectable AMI or HDB3 Line Coding
• LED indicators for DSL Link, E1/FE1 Link, LOS, TM, ER and NS
2.2 DESCRIPTION
The Patton Electronics
mDSL Rocket
offers the ability to extend
G.703/G.704 service over Multi-rate Symmetric Digital Subscriber Line
technology. Multi-rate DSL offers the ability to deliver the maximum bit
rate that a twisted pair line can accommodate. Now, ISPs, CLECs and
corporate enterprises can terminate G.703/G.704 (E1) service and
either extend nx64 G.703/G.704 service orprovide a remote serial
connection to a router or switch when paired with Model 1088/C (V.35)
or 1088/D (X.21).
As Model 1088/K receives data from E1 line, it extracts the E1
clock, and delivers smooth clock and data to the remote DSL modem
over a two-wire DSL span. In a network extension application, a
remote 1088/K delivers nx64kbps to 2 Mbps G.703 data and clocking
to device with an E1 interface. In a network termination application,
a remote Model 1088/C or 1088/D accepts this data and clock stream
and provides nx64kbps data to CPE with a V.35, or X.21 interface.
As a symmetric DSL NTU, Model 1088/K offers the same data
rates in both directions over a single pair of regular telephone lines
using Carrierless Amplitude and Phase (CAP) modulation. Equipped
with both 75 ohm (dual coax) and 120 ohm (RJ-45), the Model 1088/K
is easy to configure and install. DSL line connection is via RJ-45 jack.
Standard versions of Model 1088 are powered by a 100/230VAC
(Universal) supply. A DC power supply option supports any DC input
between 36-72VDC.
4
IMPORTANT: The Model 1088 is equipped with flash
upgrade. Please refer to Patton website, or contact Technical
Support for the latest version of the software.
NOTE: Packages received without an RMA number will not be
accepted.
33..00 CCOONNFFIIGGUURRAATTIIOONN
The Model 1088/K is equipped with two sets of eight DIP switches,
which allow configuration of the unit for a wide variety of applications.
This section describes switch locations and explains all possible configurations.
3.1 CONFIGURING THE HARDWARE DIP SWITCHES
The 16 external switches are grouped into two eight-switch sets,
and are externally accessible from the underside of the Model 1088/K
(See Figure 1, below).
The two sets of DIP switches on the underside of the Model 1088/K
will be referred to as S1 and S2. As Figure 2 shows, the orientation of
all DIP switches is the same with respect to “ON” and “OFF” positions.
5
Figure 2. Close Up of Configuration Switches (all sets are identical in appearance)
Figure 1. Underside of Model 1088/K, Showing Location of DIP Switches
Front
Rear
On
S1
S2
Off
3.1.1 Configuration DIP Switch Set “S1”
Switches S1-1 through S1-8 may be used to configure CO/CP
operation, line framing and coding, CRC-4 operation, and DTE initiated
loop diagnostics. Default settings of S1 Switches are shown in the
table below.
Switch S1-1: CO/CP
Use Switch S1-1 configure the CO (located at the Central Office or
or G.703/G.704 demarcation point) or CP (located at the Customer
Premises) mode of the 1088/K.
S1-1
CO/CP Mode
Off CO = located at the Central Office
On CP = located at the Customer Premises
CO/CP Configuration:
The Model 1088/K does not use clock mode settings as described
in other Patton mDSL products. Instead, the Model 1088/K will
always recover the clocking from the G.703/4 network and use this
clock to send data across the DSL span to the remote DSL
modem, which will use the incoming to send data out to G.703/4
network. Therefore, one unit must be set for CO mode (located at
the G.703 demarcation), and the other unit must be set for CP
mode (located at the customer premises). This type of clocking
method was employed for two reasons:
1) To allow two independent networks to use the modems as independent clocking paths.
2) To allow the user to independently specify the timing source for
the network based on external equipment.
6
Position Function
S1-1 CO/CP Setting On CP Mode
S1-2 Line Coding Off HDB3
S1-3 CRC-4 Enable Off Disabled
S1-4 Reserved Off
S1-5 Reserved On
S1-6 Reserved Off
S1-7 Reserved On
S1-8 Reserved Off
Factory Default
S1 SUMMARY TABLE
OFF
ON
7
CO/CP and Using the 1088/K with other Patton mDSL modems
Other Patton mDSL modems allow the option of specifying the
clock mode, but not the CO/CP designation. This is already done internally within the unit. When connecting a 1088/K to an mDSL modem
(e.g. Model 1088/C, 1088/D or 1095) other then a Model 1088/K,
determine the source of the system clock and then determine the
Model 1088/Ks CO/CP designation based upon the following chart.
*Reminder: In each DSL modem pairing, one unit must act as the CO unit, the other must
act as the CP unit.
Switch S1-2: Line Coding
Use Switch S1-2 to configure the G.703/G.704 network line coding. The line coding must be the same line coding prescribed by the
NAP (Network Access Provider). Most applications will use HDB3
SW4 Line Framing & Coding
Off HDB3
On AMI
Line Coding Options:
High Density Bipolar 3 (HDB3): In HDB3 coding, the transmitter
deliberately inserts a bipolar violation when excessive zeros in the
data stream are detected. The receiver recognizes these special
violations and decodes them as zeros. This method enables the
network to meet minimum pulse density requirements. Use HDB3
unless AMI is required in your application .
Alternate Mark Inversion (AMI): AMI coding does not inherently
account for ones density. To meet this requirement, you should
ensure that the data inherently meets pulse density requirements.
Switch S1-3: CRC-4 Multiframe
CRC-4 Multiframe uses Time Slot zero to carry CRC-4 information. When CRC-4 is enabled (ON), the unit synchronizes to the CRC4 multi-frame protocol.
S1-3
Option
Off Disabled
On Enabled
NOTE: When the DTE rate is set to 2048 Kbps, Model 1088/K
transmits user data on all 32 timeslots, ignoring framing information. In this case, Switch S1-3 will need to be in the disabled (Off)
position.
Switches S1-4, S1-5, S1-6, S1-7 and S1-8: Reserved
Switches S1-4, S1-5, S1-6, S1-7, S1-8 are reserved for factory
usage and must remain in the default configuration,
except when using
the Netlink Plug-and-Play feature
.
S1-4 S1-5 S1-6 S1-7 S1-8 Default Setting
Off On Off On Off Only Valid Setting
8
MDSL Modem Clock
Mode
MDSL Modem Unit
Designation
1088/K setting required
External CO CP
Internal CO CP
Receive Recover CP CO
109X
109X
9
3.1.2 Configuration DIP Switch Set “S2”
Use the eight DIP Switches in Switch S2 to enable the DTE connection rate. The following table summarizes default positions of DIP
Switch S3. Detailed descriptions of each switch follow the table.
Switch S2-1: DTE Rate
Use Switch S2-1 through S2-6 to set the DTE bit rate.
S2-1
S2-2 S2-3 S2-4 S2-5 S2-6
DTE Rate (kbps)
Off Off On On On On 64
On On Off On On On 128
Off On Off On On On 192
On Off Off On On On 256
Off Off Off On On On 320
On On On Off On On 384
Off On On Off On On 448
On Off On Off On On 512
Off Off On Off On On 576
On On Off Off On On 640
Off On Off Off On On 704
On Off Off Off On On 768
Off Off Off Off On On 832
On On On On Off On 896
Off On On On Off On 960
On Off On On Off On 1024
Off Off On On Off On 1088
On On Off On Off On 1152
Off On Off On Off On 1216
On Off Off On Off On 1280
Off Off Off On Off On 1344
On On On Off Off On 1408
Off On On Off Off On 1472
10
On Off On Off Off On 1536
On On Off Off Off On 1600
Off On Off Off Off On 1664
On Off Off Off Off On 1728
Off Off Off Off Off On 1792
On On On On On Off 1856
Off On On On On Off 1920
On Off On On On Off 1984
Off Off On On On Off 2048
Switch S2-7: Reset Software Defaults
Switch S3-7 allows the user to reset the software configured factory defaults. This will only be needed when using the Model 1001MC to
SNMP manage your units. For more information, please refer to the
Model 1001MC Operations Manual.
S3-7
Setting
On Normal Operation
Off Reset
Switch S2-8: Transmit Data (TD) Sampling Point
Switch 3-8 controls the Transmit Data (TD) sampling point.
S3-8 Setting Description
On Normal TD sampled on the falling
edge of the 1088 Transmit
Clock (TC)
Off Invert TD sampled on the rising
edge of the 1088 Transmit
Clock.
S2 SUMMARY TABLE
Position Function Factory Default
S2-1 DTE Rate Off
S2-2 DTE Rate Off
S2-3 DTE Rate On
S2-4 DTE Rate On
S2-5 DTE Rate On
S2-6 DTE Rate Off
S2-7 Reset Software Defaults On
Normal Operation
S2-8
Transmit Data Sample Point
On Normal Operation
}
2048 kbps
NOTE: Based on the DTE rate chosen, the Model 1088/K will
automatically select the optimum line rate for the distance. This
selection is based on the lowest line rate that will support the
DTE rate.
11
3.2 NETLINK PLUG-AND-PLAY
The NetLink Plug-and-Play feature allows ISPs, carriers and PTTs
to quickly upgrade the link speed for a customer without requiring a
visit to re-configure the Customer Premise (CP) Model 1088. This feature also allows service providers to set up all of the configurations at
the Central Office (on the rack cards) before installing the stand alone
units, saving time spent configuring or re-configuring DIP switches.
The NetLink Plug-and-Play feature allows the user to configure the
DTE rate (bandwidth allocation, see Switches S2-1 through S2-6) of
the CP unit from the rack card at the Central Office (CO). The stand
alone unit at the Customer Premise (CP) site will automatically configure itself to the DTE rate (Bandwidth Allocation) of the rack card.
Other configuration parameters remain in the default setting.
Follow the instructions below to activate NetLink Plug-and-Play
between CO (Model 1095RC and CP (Model 1088) units:
1. Set the Model 1095RC (CO) to either Internal or External
clocking mode as defined by the application.
2. Set the Model 1088 (CP) to “NetLink Plug-and-Play CP” by
setting S1 and S2 DIP switches in the ON position as
described in Figure 3, below.
When the CO and CP units connect over DSL, the CP will enter a predefined default configuration (Receive Recovered Clocking). During
the negotiation process between the units, the CO unit will configure
the DTE rate/line rate on the CP unit as defined by the settings of the
CO unit. When additional bandwidth is required, only the configuration
of the CO unit should be changed. This feature gives ISPs, LECs and
PTTs the ability to provision bandwidth on an as needed basis to customers.
The NetLink Plug and Play application will also work in an
HTTP/SNMP managed system using the NetLink Model 1001MC
SNMP agent card with 1095RC cards installed in Patton’s 2U rack system. In this application, the system administrator can configure the
entire rack through the Network Management Station (NMS) before the
stand alone (CP) units are installed. For more information on the
HTTP/SNMP management, please refer to the Model 1001MC
Operations Manual.
12
1095RC
(CO)
1088
(CP)
DIP Switches all in ON position
DIP Switches or NMS configured
according to specific application
requirements
DSL Span
NOTE: NetLink Plug-and-Play is only available when
using a rack-mounted NetLink Model 1095RC as the
CO unit.
Figure 3. Typical NetLink Plug-and-Play Application
44..00 IINNSSTTAALLLLAATTIIOONN
Once the Model 1088/K is properly configured, it is ready to connect to the twisted pair interface, to the serial port, and to the power
source. This section describes how to make these connections.
4.1 CONNECT G.703 NETWORK
The Power, G.703/G.704 and DSL Line connections are located
on the rear panel of the Model 1088/K. Figure 4, below, shows the
location of each of these ports.
4.2 JUMPER CONFIGURATION
The Model 1088/K has six jumpers (two position headers): JP1JP6. These jumpers are used to select input or output impedance
matching between the module, external line, and to employ either BNC
or RJ-45 interface. Figure 5 (below) shows the top view of the printed
circuit board (PCB) and the location of the jumpers.
13
The following is a description of the jumper settings with respect to
the front panel connectors.
1. For a 75 Ohm connection (coax) insert JP1, JP4, JP5, and JP6
(default)
2. For a 120 Ohm connection (RJ45) remove JP1 and JP4, JP5, and
JP6.
4.2.1 Connect Twisted Pair (120 ohm) to G.703 Network
The Model 1088/K is equipped with a single RJ-48C jack for connections to a 120 ohm twisted pair G.703/G.704 network interface. If
your G.703/G.704 network terminates via RJ-48C, use the diagram
below and the table on the following page to make the proper connec-
tions. The connector pinout and signals are shown in Figure 6, below.
Use the following connection diagram to connect the 120 ohm
G.703/G.704 network channel.
RJ-45 Cab
le (8-Wire)
1088/K G.703/G.704
SIGNAL
PIN# NETWORK SIGNAL
RX+ 1-----------------------TX+
RX- 2 -----------------------TX-
TX+ 5 -----------------------RX+
TX- 4 -----------------------RX
Shield 3 -----------------------Shield
Shield 6 -----------------------Shield
14
Figure 4. Model 1088/K Rear Panel
Figure 6: 120 Ohm RJ-48C G.703 Interface
(No Connection) 8
(No Connection) 7
(No Connection) 6
(TX+) 5
(TX-) 4
(No Connection) 3
(RX-) 2
(RX+) 1
8
7
6
5
4
3
2
1
G.703/G.704 Terminations
DSL Line
Power
Figure 5. Top view of 1088/K, showing location of JP1-JP6
PATTON ELECTRONICS 033141F REV A 1999
©
JP1
JP2
JP3
JP6
JP4
JP5
4.2.2
Connect Dual Coaxial Cable (75 ohm) to G.703 Network
The Model 1088/K is also equipped with dual female BNCs (TX
and RX) for connection to a 75 ohm dual coax G.703 network interface. If your G.703/G.704 network terminates via dual coaxial cable,
use the diagram below to make the proper connections. The connector pinout and signals are shown in Figure 7, below.
NOTE: The outer conductor of the coax cables are isolated
from system earth ground.
4.3 CONNECT TWISTED PAIR DSL INTERFACE
The Model 1088/K supports communication between two DTE
devices at distances to 5 miles (8 km) over 24 AWG (.5mm) twisted
pair wire. Two things are essential:
1. These units operate as a pair. Both units at the end of the
twisted pair DSL span must be set for the same DTE rate.
2. To function properly, the Model 1088 needs one
twisted pair of metallic wire. This twisted pair must be
unconditioned, dry, metallic wire, between 19 (.9mm) and 26
AWG (.4mm) (the higher number gauges will limit distance).
Standard dial-up telephone circuits, or leased circuits that run
through signal equalization equipment, or standard, flat modular telephone type cable, are
not acceptable
.
The RJ-45 connector on the Model 1088’s twisted pair interface is
polarity insensitive and is wired for a two-wire interface. The signal/pin
relationships are shown in Figure 8.
15
4.4 POWER CONNECTION
Universal AC Power (100-240VAC)
The Model 1088 uses a 5VDC, 2A universal input 100-240VAC,
power supply (center pin is +5V). The universal input power supply
has a male IEC-320 power entry connector. This power supply connects to the Model 1088 by means of a barrel jack on the rear panel.
Many international power cords are available for the universal power
supply (Please refer to Appendix B for country-specific power cords.
The Model 1088 powers up as soon as it is plugged into an AC
outlet--there is no power switch.
120 VAC Power (US)
The 100-132 VAC adapter supplied with the U.S. version of the
Model 1088 is a wall mount type and may be plugged into any
approved 120 VAC wall jack.
230 VAC Power (International)
The 230 VAC adapter supplied with the International version of the
Model 1088 is a wall mount type and may be plugged into any
approved 230 VAC wall jack.
DC Power
The 36-60 VDC DC to DC adapter supplied with the DC version of
the Model 1088 plugs in a DC source (nominal 48VDC) and plugs into
the barrel power supply jack on the rear of the 1088/K. Please refer to
Figure 9 to make the proper connection.
16
Figure 8. Model 1088 twisted pair line interface.
1 (N/C)
2 (N/C)
3 (N/C)
4 (2-Wire TIP)
5 (2-Wire RING)
6 (N/C)
7 (N/C)
8 (N/C)
1
2
3
4
5
6
7
8
TX
(Data
TO
G.703/G.704
Network)
RX
(Data
FROM
G.703/G.704
Network)
Network
Figure 7: 75 Ohm Dual Coaxial G.703 Interface
17
55..00 OOPPEERRAATTIIOONN
Once the Model 1088 is properly configured and installed, it
should operate transparently. This sections describes power-up, reading the LED status monitors, and using the built-in loopback test
modes.
5.1 POWER-UP
To apply power to the Model 1088, first be sure that you have read
Section 4.3, and that the unit is connected to the appropriate power
source.
5.2 LED STATUS MONITORS
The Model 1088 features six front panel LEDs that monitor power,
the DTE signals, network connection and test modes. Figure 10
(below) shows the front panel location of each LED. Following Figure
10 is a description of each LEDs function. See also
APPENDIX E.
DSL Link (Active Green) Solid green (On) indicates that the
end to end DSL Framer Link is up, signifying that
the link across the DSL span is active. The DSL
Link LED is Off when the link is down.
E1/FE1 Link (Active Green) Solid green (On) indicates a valid
E1 connection.
LOS (Active Red) The Loss of Sync indicates that the
unit has lost synchronization with the incoming signal.This may happen when there is a framing mismatch or a loss of signal. In unframed mode, the
LOS LED monitors the status of the transmit clock.
NS (Active Red) The No Signal LED glows red to
indicate that the local Model 1088 is not connected
with the remote Model 1088.
18
Figure 10. Model 1088/K Front Panel
Figure 9. Connecting DC Power to the 48V-PSM DC Power Supply.
-Vin
To Power
Supply Jack
To -48VDC
Source
+Vin
WARNING! There are no user-serviceable parts in the
power supply section of the Model 1088. Fuse replacement
should only be performed by qualified service personnel.
Contact Patton Electronics Technical support at
(301)975-
1007
, via our web site at http://www.patton.com, or by e-mail
at support@patton.com, for more information.
ER (Flashing Red) - blinks ON/OFF after a 511/511E
test has timed out. See Section 5.3.3 (Test
Pattern Generator) for more information.
- flashes once to indicate that a CRC error has
occurred (during normal operation) or bit errors
have occurred (during 511/511E tests).
- Only at power up, blinks once every 200 ms if
the DTE Rate is set to an unsupported settings
TM (Active Yellow) glows yellow to indicate that the
Model 1088/K has been placed in Test Mode. The
unit can be placed in test mode by the local user
or by the remote user. The TM LED will flash for
400msec when a valid packet is received from the
Model 1001MC.
5.3 TEST MODES
The Model 1088 offers two proprietary loopback test modes, plus
a built-in V.52 BER test pattern generator to evaluate the condition of
the modems and the communication link. These tests can be activated physically from the front panel.
5.3.1 Overview
Figure 11 below shows the major elements used in the loop-back
and pattern tests available in the Model 1088. Each block has several
functions. Following Figure 11 are descriptions that show how the elements are used during Test Modes.
19
Framer The framer is used to determine the status of
the line. In normal operation the framer transmits and expects to receive framed packets
from the far end. If the framer receives framed
packets from the far end, the DSL Link LED will
be active. If framed packets are not received,
the DSL Link LED will be inactive. The restart
procedure uses this information to determine if a
valid connection is made (cable disconnect,
poor cable quality, etc). In normal Data Mode, if
the box receives 4 seconds of unframed packets
it will restart the box and begin trying to reestablish a connection with the far end. The distinction between framed packets and unframed
packets becomes important when we discuss
the Pattern Generator.
Pattern Gen/Det This part of the Processor generates and
detects the 511/511E patterns. When transmitting 511 patterns, the information is unframed
(because it originates after the framer) and is
intended to be evaluated only by another
Processor. If the units are in Data Mode and the
pattern generator is enabled on one end of the
link, the far end will begin receiving unframed
packets and assume that the line has gone
down. During test modes, we force the pattern
generator to time out before it can cause the link
to be killed.
Loop Control This part of the Processor is used to control
loop-backs. In a Local Loop, the data is looped
back towards the local DTE (G.703/G.704). In a
Remote Loop, the data is looped back to the
line, but it is also allowed to pass through to the
framer and to the remote DTE (G.703/G.704).
20
Pattern
Gen/Det
Loop
Contr
ol
Loop
Contro
l
Pattern
Gen/Det
Processor
Processor
Framer
Framer
Line
Figure 11: Block Diagram Model 1088
Restart Procedure The restart procedure is in place to allow the
and Time Outs units to re-establish a connection after the
framer begins seeing unframed packets. The
Test Model Timing Chart below shows the
amount of time the framer must see consecutive
unframed packets before the unit will restart and
try to establish a new line connection. The reason that there are different Restart Times will
become apparent after reading the rest of the
document. The 511/511E Time Out shown refers
to the amount of time the 511/511E pattern will
be valid. At the end of this time the pattern will
automatically turn itself off and the normal data
path will be re-established. The ER led will flash
indicating to the user that the test has timed out.
The ER led will stop flashing once the 511/511E
switch is placed into the normal position.
Symbol Indicators
This symbol designates the origination or the
termination of a data path. The direction of the
arrow connected distinguish the two data paths.
This symbol designates an invalid data path. If
there is data present it should be ignored.
21
5.3.2 Loops and Patterns
The following section describes the Test Modes used in the Model
1088. At the bottom of each Test Mode, a figure is included to show
the data path.
Local Loop There are two different modes of operation for a
Local Loop depending on the status of the units
at the time that the Local Loop is initiated. If the
units are not in linked (NS LED on) and the
Local Loop is initiated, either by the front panel
switch or the DTE interface, the unit will enter
mode 1. If the units are linked, NS LED off, then
the unit will enter a mode 2 Local Loop.
A Mode 1 Local Loop is shown in Figure 12.
When the Local Loop is initiated, either by the
front panel switch or the DTE interface, the loop
will be activated within the local Processor. The
data present at the local DTE interface will be
looped back to the local DTE by the Loop
Control block within the Processor. Any data
present on the line or at the far end DTE interface is invalid. The remote unit will remain in the
StartUP mode, NS LED on, DSL Link LED stays
off, until the local unit is taken out of the Local
Loop mode. After the Local Loop is deselected,
the units will both be in StartUP mode and the
link will be established.
A mode 2 Local Loop is shown in Figure 13.
When the Local Loop is initiated, either by the
front panel switch or the DTE interface, two separate loop paths will be started. In the first path,
data presented to the local DTE interface will be
looped back to the local DTE within the framer.
In the second path, data presented at the far
end DTE will be transmitted to the local DTE
and then looped back within the local DTE Loop
Control block with the Processor. After the Local
Loop is deselected, the units will be placed back
into DataMode and the normal data paths will be
re-established.
22
Test Mode Timing
Item Elapsed Time (seconds)
Start Up 50
Data Mode 4
511/511E Generator Enabled 60 (The generator will stop after 45 seconds.)
Remote End of an RDL 60
511/511E Time Out 45 (The pattern generator will automatically turn
off after 45 seconds. The ER LED will flash until
the user turns off the 511/511E switch.)
Figure 12. Block Diagram Local Loop Mode 1
Figure 13. Block Diagram Local Loop Mode 2
Local Loop When the unit is placed into a Mode 1. Local
with 511/511E Loop and the 511/511E pattern generator is acti-
vated, the local pattern generator begins sending out a 511/511E pattern to the Loop Control
block. The Loop Control block will loop this data
back to the 511/511E pattern detector block,
which will evaluate the data for errors. Because
the 511/511E pattern generator is contained
within the Processor the data is unframed so the
framer will begin seeing unframed packets. The
framer receives this unframed data and can not
distinguish this information from a line disconnection (this would cause the units' Restart procedure to start). What we have done to allow
this mode to work is to add time outs for the pattern generators. When the 511/511E is initiated,
the line restart procedure is changed to one
minute. The 511/511E pattern will timeout after
45 seconds. So if the 511/511E is turned on during a local loop, the restart procedure is set to
one minute, but the 511/511E pattern will time
out after 45 seconds, allowing the framer to
begin seeing framed packets (and not restart
the box).
23
Local Loop After the 511/511E pattern times out, the ER led
with 511/511E will begin flashing. It will remain this way until
(continued) the pattern generator switch is turned off. Note
that the data at the local DTE and the remote
DTE are not valid. Because the data is
unframed there is no way for the framer to send
this data out to the DTE. This is an important
distinction because other Patton units will send
out the 511 pattern.
When the unit is placed into a Mode 2 Local
Loop, the 511/511E pattern generator on the
local unit is unavailable for transmission. Figure
15 displays the 511/511E pattern generator,
showing that data path connections are not
available. The 511/511E pattern generator is still
available on the remote unit. For more information on the proper operation of this pattern generator please refer to the "Remote Digital Loop
with 511/511E" section.
24
Pattern
Gen/Det
Loop
Contr
ol
Loop
Contro
l
Pattern
Gen/Det
Processor
Processor
Framer
Framer
Line
Pattern
Gen/Det
Loop
Contr
ol
Loop
Contro
l
Pattern
Gen/Det
Processor
Processor
Framer
Framer
Line
Pattern
Gen/Det
Loop
Contr
ol
Loop
Contro
l
Pattern
Gen/Det
Processor
Processor
Framer
Framer
Line
Pattern
Gen/Det
Loop Contr
ol
Loop Contro
l
Pattern
Gen/Det
Processor
Processor
Framer
Framer
Line
Figure 14. Block Diagram Local Loop Mode 1 with 511/511E
Figure 15. Block Diagram Local Loop Mode 2 with 511/511E
Remote Digital The Remote Loop uses the EOC channel (an
Loop out-of-band signaling channel) to establish the
remote link. Upon the RDL switch being thrown
or DTE initiation, a RDL_ON Request signal is
sent to the remote unit. The Remote unit then
responds with an RDL Acknowledge command
and the link is established. Data originates at
the local DTE and is looped at the Remote
PROCESSOR back to the Local DTE. Note that
the data is also passed through to the Remote
DTE and is not squelched. When a Remote unit
enters RDL, it changes its' Restart timeout to
one minute (the reason will be explain in the
RDL with 511/511E section). If the line is disconnected, the local unit will Restart (NS led activated) after 4 - 6 seconds, but the Remote unit will
wait for one minute before it Restarts. Note that
the transmit data at the Remote DTE is ignored.
When the switch is thrown or the DTE removes
the RDL request, the local unit will transmit an
RDL_OFF Request to the Remote unit. The
local unit will keep its' TM led active until this
request has been completely sent out. If the
switch is thrown again before the completion of
the termination phase the switch will be ignored
until it is placed back into the normal position.
25
26
Remote Digital The Remote Digital Loop with 511/511E is
Loop with shown above. After RDL is established the
511/511E Remote units' Restart Timer is set to one
minute. This has been done because when the
511/511E generator is started on the local unit,
the Remote framer begins seeing unframed
packets. The Remote unit can not distinguish
the 511/511E pattern from the line being disconnected so the Restart Timer has been lengthened to allow the pattern generator to function.
Once the 511/511E test is started, the Local unit
changes its' Restart Timer to one minute. The
pattern originates within the Processor and is
sent to the Remote unit. It is then looped back to
the Local unit where it is evaluated for errors.
After 45 seconds, the Pattern Generator will
timeout and stops sending the pattern. The ER
led will begin blinking until the user turns off the
511/511E switch.
Pattern
Gen/Det
Loop
Contr
ol
Loop
Contro
l
Pattern
Gen/Det
Processor
Processor
Framer
Framer
Line
Figure 16. Block Diagram Remote Loop
Figure 17. Block Remote Loop with 511/511E
Pattern
Gen/Det
Loop
Contr
ol
Loop
Contro
l
Pattern
Gen/Det
Processor
Processor
Framer
Framer
Line
Data Mode with When the units enter DataMode it is possible to
511/511E Pattern turn on the 511/511E pattern generators on
Generators both ends of the link. Once a 511/511E pattern
is selected on one end of the link, the pattern
generator will begin transmitting unframed
511/511E through the line to the Remote end. A
possible problem with this test can occur due to
the Restart procedure. Once the Local 511/511E
is turned on, the Remote unit begins receiving
an unframed 511 pattern. If the Remote unit
does not turn on the 511/511E-pattern generator
within 4 seconds, the Remote unit will Restart
and enter the StartUp mode. Note that once the
511/511E-pattern generator is started the
Restart timer is changed to one minute (only on
the unit which has the pattern enabled). If both
units enable the 511/511E pattern within 4 seconds of each other, both units will be transmitting and receiving the 511/511E pattern. Both
framers are now receiving unframed data and
will restart after one minute. The 511/511E pattern generators will TimeOut after 45 seconds
re-enabling the normal data path. The ER led
will begin flashing until the user terminates the
test.
5.3.3 Using the V.52 (BER) Test Pattern Generator
To use the V.52 BER tests in conjunction with the Remote Digital
Loopback tests (or with Local Line Loopback tests), follow these
instructions:
1. Locate the “511/511E” toggle switch on the front panel of the
1088 and move it UP. This activates the V.52 BER test mode
and transmits a “511” test pattern into the loop. If any errors
are present, the local modem’s red “ER” LED will blink
sporadically.
2. If the above test indicates no errors are present, move the
V.52 toggle switch DOWN, activating the “511/E” test with
errors present. If the test is working properly, the local
modem's red “ER” LED will glow. A successful “511/E” test
will confirm that the link is in place, and that the Model
1088’s built-in “511” generator and detector are working
properly.
27 28
NOTE: The above V.52 BER tests can be used independently
of the Remote Digital Loopback tests. This requires two operators: (1) to initiate and monitor the tests at the local Model 1088,
and (2) to do the same at the remote Model 1088. In this case,
the test pattern sent by each Model 1088 will not be looped back,
but will be transmitted down the line to the other Model 1088.
While one operator initiates test, the other monitors for errors.
Pattern
Gen/Det
Loop
Contr
ol
Loop
Contro
l
Pattern
Gen/Det
Processor
Processor
Framer
Framer
Line
Figure 18. Block Diagram DataMode with 511/511E
AAPPPPEENNDDIIXX AA
PATTON ELECTRONICS G.703 SDSL MODEM
SPECIFICATIONS
Clocking Modes: Network (G.703)
DTE Rate: All 64k steps from 64 to 2048 kbps
Diagnostics: V52 compliant (511/511E) pattern generator
and detector with error injection mode.
Remote Loopback (toward DSL line) and
local loopback (toward G.703 network) con
trol by a single front panel switch
LED Status: The following LEDs are displayed on the
front panel:
DSL Link (Green Active) - DSL Link Active
E1 Link (Green Active) - Valid
G.703/G.704 connection
LOS (Red Active) - E1 loss of framing
NS (Red Active) - No signal DSL Link
ER (Flashing Red) - CRC error during nor-
mal operation, bit error during pattern generation test
TM (Active Yellow) - Test Mode Enabled
Configuration: Externally accessible dip switches or SNMP
managed through 1095RC
Power: 5 VDC from external desk top power supply,
90-260VAC, 50-60 Hz (Universal
Input), 10W or -48 VDC
Compliance: FCC Part 15, CE, CTR12, CRTR13
Transmission Line: Single Twisted Pair
Line Coding: CAP (Carrierless Amplitude and Phase
Modulation
Line Rates (DSL line): 144, 272, 400, 528, 784, 1040, 1552, 2064,
Line Interface: Transformer coupled, 1500 VAC isolation
mDSL Physical
Connection: RJ-45, 2 wire, polarity insensitive pins 4
and 5
G.703/G.704 Specific
Interface: Female Dual Coaxial 75 ohm or
Female RJ-45 120 ohm
Line rate:
2.048 Mbps
Line coding: AMI or HDB3 (selectable) HDB3 is the default
Line Framing: G.703 (unframed) or G.704/G.732 (framed)
Isolation: 1500 Vrms
Physical Connection: pin 1 Rx Data +
pin 2 Rx Data pin 4 Tx Data pin 5 Tx Data pins 3, 6, 7, 8 no connection
AAPPPPEENNDDIIXX BB
PATTON ELECTRONICS MODEL 1088/K
FACTORY REPLACEMENT PARTS
AND ACCESSORIES
Patton Electronics Model #
Description
1088/K.............................G.703 mDSL Rocket (CAP)
080551............................120V Power Supply
080552............................230V Power Supply
48V-PSM.........................DC Power Supply Module
08055DCUI .....................100-240VAC (+5V ±5% reg. DC/2A)
Universal Input Adapter
0805EUR ........................European Power Cord CEE 7 (“A”)
0805UK ...........................United Kingdom Power Cord (“D”)
0805US ...........................American Power Cord (“K”)
0805AUS.........................Australia/New Zealand Power Cord (“C”)
0805DEN .........................Denmark Power Cord (“E”)
0805FR............................France/Belgium Power Cord (“F”)
0805IN .............................India Power Cord (“G”)
0805IS.............................Israel Power Cord (“H”)
0805JAP ..........................Japan Power Cord (“J”)
0805SW...........................Switzerland Power Cord (“L”)
07M1088/K......................User Manual
29 30
AAPPPPEENNDDIIXX CC
PATTON ELECTRONICS MODEL 1088
TRANSMISSION DISTANCE CHART
Line Rate DTE Rates
kbps feet miles km feet miles km
144 64, 128 21400 4.0 6.6 30700 5.8 9.4
272 192, 256 20300 3.8 6.2 30600 5.8 9.4
400 320, 384 18600 3.5 5.7 29100 5.5 9
528 448, 512 17400 3.3 5.4 26100 4.9 8.0
784 576, 640, 704, 768 15800 3.0 4.9 22600 4.3 7.0
1040 832, 896, 960, 1024 15500 2.9 4.8 22100 4.2 6.8
1552 1088 - 1536 13600 2.6 4.2 19200 3.6 5.9
2064 1600 - 2048 12200 2.3 3.8 17200 3.3 5.3
Line Rate DTE Rates
kbps feet miles km feet miles km
144 64, 128 16992 3.2 5.2 25000 4.7 7.7
272 192, 256 15088 2.9 4.6 22000 4.2 6.8
400 320, 384 13264 2.6 4.2 20000 3.8 6.2
528 448, 512 12300 2.3 3.8 18000 3.4 5.5
784 576, 640, 704, 768 10216 1.9 3.1 14000 2.6 4.3
1040 832, 896, 960, 1024 8417 1.6 2.6 12000 2.3 3.7
1552 1088 - 1536 7107 1.3 2.2 10000 1.9 3.1
2064 1600 - 2048 5920 1.1 1.8 8000 1.5 2.5
Cross Talk (49 adjacent CAP pairs)
26 AWG (0.4mm)
24 AWG (0.5mm)
Transmiss ion D is tanc e - Patton NetLink mD SL Model 1088
No Cross Talk
26 AWG (0.4mm)
24 AWG (0.5mm)
31 32
AAPPPPEENNDDIIXX DD
MODEL 1088/K
LED DESCRIPTIONS
-----------------------------------------------------------------------
E1/FE1 LOS DSL Link NS ER TM E1/FE1 LOS DSL Link NS ER TM
-----------------------------------------------------------------------
Power ON G* R* off ON off off G* R* off ON off off
DSL Link G* R* G* off off off G* R* G off off off
Link Brk G* R* off off off off G* R* off off off off
Brk+ 10s G* R* off ON off off G* R* off ON off off
RDL G* R* G* off off ON G* R* G off off ON
RDL+511 G* R* off off off ON G* R* off off off ON
-----------------------------------------------------------------------
With DTE Connected With DTE Connected
-----------------------------------------------------------------------
Mark G* R* G* off off off G* R* G off off off
Space G* R* G* off off off G* R* G off off off
Data G* R* G* off off off G* R* G off off off
Link Brk = DSL Link Broken
Brk+10s = 10 Seconds following Link Break
G=GREEN
O=ORANGE
ON= ON
off= OFF
G*=Green if a valid 10Base-T connection is detected.
R*=Red if a loss of sync on the E1 signal is detected.
Copyright ©1999
Patton Electronics Company
All Rights Reserv
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