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USER
MANUAL
MODEL 1088/C
and 1088/D
mDSL Modem with
V.35 or X.21 Interface
An ISO-9001Certified
Company
Part# 07M1088-UM
Doc# 03312U2-001
Rev. E
Revised 10/23/06
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
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CONTENTS
1.0 Warranty Information ................................................................. 4
1.1 Radio and TV Interference............................................................ 4
1.2 CE Notice...................................................................................... 4
1.3 Service.......................................................................................... 5
2.0 General Information.................................................................... 6
2.1 Features........................................................................................ 6
2.2 Description.................................................................................... 6
3.0 Configuration .............................................................................. 7
3.1 Configuring the Hardware DIP Switches ...................................... 7
Configuration DIP Switch Set “S2” ............................................... 8
Switch S2-1, S2-2, S2-3, S2-4, and S-5 ................................ 8
Switches S2-6 and S2-7: Clock Mode ................................... 8
Switch S2-8: Enable/Disable Loop Tests from DTE .............. 8
Configuration Switch Set “S3” ...................................................... 9
Switch S3-1: DTE Rate .........................................................9
Switch S3-7: Reset Software Defaults ................................ 10
Switch S3-8: Transmit Data (TD) Sampling Point ............... 11
3.2 NetLink Plug-and-Play................................................................ 11
4.0 Installation................................................................................. 13
4.1 Connecting the Twisted Pair Interface........................................ 13
4.2 Connecting the Model 1088/C (V.35) Serial Interface................ 13
Connecting the Model 1088/C (V.35) to a “DTE” Device............ 13
Connecting the Model 1088/C (V.35) to a “DCE” Device........... 14
4.3 Connecting the Model 1088/D (X.21) Serial Interface................ 14
Connecting the Model 1088/D (X.21) to a “DCE” or
“DTE” Device.............................................................................. 14
Opening the Case....................................................................... 15
4.4 Connecting Power ...................................................................... 16
Universal AC Power (100–240 VAC).......................................... 16
120 VAC Power (US).................................................................. 17
230 VAC Power (International)................................................... 17
DC Power................................................................................... 17
5.0 Operation................................................................................... 18
5.1 Power-Up.................................................................................... 18
5.2 LED Status Monitors................................................................... 18
Model 1088 LED Descriptions Chart.......................................... 19
5.3 Test Modes................................................................................. 19
Overview..................................................................................... 20
5.4 Loops and Patterns..................................................................... 22
Using the V.52 (BER) Test Pattern Generator ........................... 26
A Specifications ........................................................................... 27
A.1 Clocking Modes .......................................................................... 27
A.2 DTE Rate ..................................................................................... 27
A.3 DTE Interface .............................................................................. 27
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A.4 DTE Connector ........................................................................... 27
A.5 Diagnostics ................................................................................. 27
A.6 LED Status .................................................................................. 27
A.7 Configuration .............................................................................. 27
A.8 Power .......................................................................................... 28
A.9 Compliance ................................................................................. 28
A.10 Transmission Line ....................................................................... 28
A.11 Line Coding ................................................................................ 28
A.12 Line Rates (DSL line) .................................................................. 28
A.13 Line Interface .............................................................................. 28
A.14 mDSL Physical Connection ........................................................ 28
A.15 Environment ................................................................................ 28
B Factory Replacement Parts and Accessories........................ 29
C Model 1088/C Interface Pin Assignments............................... 30
D Model 1088/D Interface Pin Assignments............................... 31
E Model 1088/C and 1088/D Transmission distance chart ....... 32
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1.0 WARRANTY INFORMATION
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.
Note
Conformity documents of all Patton products can be viewed
online at www.patton.com under the appropriate product page.
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.
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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 Services at:
• Tel: +1
• Email:
• URL:
Note
Note
(301) 975-1007
support@patton.com
http://www.patton.com
Packages received without an RMA number will not be
accepted.
The Model 1088 is flash upgradeable. Please refer to Patton
website, or contact Technical Support for the latest version of
the software.
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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 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
• CAP (Carrierless Amplitude and Phase) Modulation
• Data Rates up to 2.304Mbps
• V.35 and X.21 Interfaces
• Interoperable with Popular Model 1095
• SNMP Manageable with 1095RC and 1001MC as 1001MC SNMP
Agent Rack Card
• NetLink Plug ‘n’ Play for Easy Installations
• Universal Power Options, 120VAC, 230VAC and -48VDC Available
• Front Panel Status Indicators
• CE Marked
2.2 DESCRIPTION
The Patton Electronics mDSL Rock et provides high speed 2-wire connectivity to ISPs, PTTs, and corporations using mDSL (Multi-rate Symmetric Digital
Subscriber Line) technology . Multi-rate DSL offers the ability to deliv er the
maximum bit rate that a twisted pair line can accommodate. Supporting multiple line rates from 144 kbps to 2.320 Mbps, the NetLink provides “megabyte” speeds to leased line , LAN to LAN interconnection, and WAN access
networks over 3.6 miles/5.8 km (1.054 Mbps on 24A WG/.5 mm wire).
Model 1088/C provides a V.35 interface on an M/34 female connector. Model
1088/D provides an X.21 interface on a DB-15 f emale connector. F eatures
include loopback diagnostics, SNMP/HTTP remote management capabilities
using NetLink Plug-and-Play and inband externally accessible configuration
switches. All versions of the Rock et are compatible with Patton’s popular
Model 1095 standalone and 1095RC rack card.
As a symmetric DSL NTU, NetLinkTM mDSL offers the same data rates in
both directions over a single pair of regular telephone lines using Carrierless
Amplitude and Phase (CAP) modulation. Line connection is made b y an RJ45 jack. Standard v ersions of Model 1088 are pow ered b y a 100/230 V A C
(Universal) supply. The DC power supply option supports any DC input
between 36–72 VDC .
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3.0 CONFIGURATION
The Model 1088 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 configur ations.
3.1 CONFIGURING THE HARDWARE DIP SWITCHES
The 16 external switches are grouped into two eight-s witch sets , and are
externally accessible from the underside of the Model 1088 (See
Figure 1).
Front
8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1
S2
S3
On
Off
Back
Figure 1.
Underside of Model 1088, Showing Location of DIP Switches
The two sets of DIP switches on the underside of the Model 1088 will be
referred to as S2 and S3. As Figure 2 shows, the orientation of all DIP
switches is the same with respect to “ON” and “OFF” positions.
ON
OFF
Figure 2.
Close-up of configuration switches (all sets are identical in appearance)
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Configuration DIP Switch Set “S2”
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 Table 1.
Table 1:
S2 Summary Table
Position Function
S2-1 Reserved
S2-2 Reserved
S2-3 Reserved
S2-4 Reserved
S2-5 Reserved
S2-6 Clock Mode On
S2-7 Clock Mode Off
S2-8 Enable Loop from DTE
Switch S2-1, S2-2, S2-3, S2-4, and S-5.
Factory Default
Off
Off
Off
Off
Off
Receive
Recover
Off Disabled
Reserved for factory use and
must remain in the OFF Position.
Switches S2-6 and S2-7: Clock Mode.
Use Switches S2-6 and S2-7 to
configure the 1088 for internal, external, or receive recover clock mode.
CO/CP
Unit
S2-6 S2-7 Clock Mode Description
CO On On Internal Transmit clock gener-
ated internally
CO Off On External (DTE) Transmit clock derived
from terminal interface
CP On Off Receive Recover Transmit clock derived
from the received line
Off Off Reserved
Switch S2-8: Enable/Disable Loop Tests from DTE.
Switch S2-8 may
be used to allow Model 1088/C to enter loopback diagnostic tests (Local
or Remote) when the V.35 DTE raises the appropriate loop request pin
(LLB: Pin L or RDL: Pin N). When Switch S2-8 is in the On position, the
Model 1088/C will enter Local Loopback or Remote Loopback at the
request of the DTE. When Switch S2-8 is in the Off position, the Model
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1088/C ignores DTE loop requests. In the Off position, loop requests
may still be initiated by the front panel switch.
S2-8 Setting
On DTE Loopback Request Enabled
Off DTE Loopback Request Disabled
Configuration Switch Set “S3”
Use the six DIP Switches in Switch S3 to enable the DTE bit rate. The
following table summarizes default positions of DIP Switch S3. Detailed
descriptions of each switch follow the table.
Table 2:
S3 Summary Table
S3 SUMMARY TABLE
Position Function Factory Default
S3-1 DTE Rate On
S3-2 DTE Rate Off
S3-3 DTE Rate Off
S3-4 DTE Rate Off
S3-5 DTE Rate On
S3-6 DTE Rate On
S3-7 Reset Software Defaults On
S3-8
Transmit Data Sample Point
On Normal Operation
768 kbps
Normal Operation
Switch S3-1: DTE Rate.
Use Switch S3-1 through S3-6 to set the DTE
bit rate.
S3-1 S3-2 S3-3 S3-4 S3-5 S3-6 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
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S3-1 S3-2 S3-3 S3-4 S3-5 S3-6 DTE Rate (kbps)
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
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
On On Off On On Off 2112
Off On Off On On Off 2176
On Off Off On On Off 2240
Off Off Off On On Off 2304
Note
Based on the DTE rate chosen, the Model 1088 will automatically select the optimum line rate depending on distance and
line conditionsfor the distance. The line selection will be based
on the lowest line rate that will support the DTE rate.
Switch S3-7: 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
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Switch S3-8: 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 Trans-
mit Clock (TC)
Off Invert TD sampled on the rising edge of the 1088 T r ansmit
Clock.
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 the customer 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 S3-1 through S3-6) 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.
Note
NetLink Plug-and-Play is only available when using a rackmounted NetLink Model 1095RC as the CO unit.
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
all S2 and S3 DIP switches in the ON position as described in
Figure 3.
1095RC
(CO)
DIP Switches or NMS configured
according to specific application
requirements
Figure 3.
Typical NetLink Plug-and-Play Application
DSL Span
DIP Switches all in ON position
1088
(CP)
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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.
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4.0 INSTALLATION
Once the Model 1088 is properly configured, it is ready to connect to the
twisted pair interface, to the serial port, and to the power source. This
section tells you how to make these connections.
4.1 CONNECTING THE TWISTED PAIR INTERFACE
The Model 1088 supports communication between two DTE devices at
distances to 5 miles (8 km) over 24 AWG (.5 mm) twisted pair wire. Two
things are essential:
1. These units work in pairs. 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 4.
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)
Figure 4.
1
2
3
4
5
6
7
8
Model 1088 RJ-45 twisted pair line interface.
4.2 CONNECTING THE MODEL 1088/C (V.35) SERIAL INTERFACE
Model 1088/C supports V.35 serial port connections. This section
describes how to connect the serial ports to your V.35 equipment.
Connecting the Model 1088/C (V.35) to a “DTE” Device
The Model 1088/C provides a V.35 DCE (Data Circuit Terminating Equipment) interface on an M/34 female connector. As a DCE, this interface is
designed to connect to DTE equipment, such as a router. When connecting the V.35 interface of the Model 1088/C to your DTE device, use a
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V.35 straight through cable (See Figure 5). Appendix C describes pin
assignments and signal sources for the Model 1088/C V.35 interface.
When purchasing or constructing an interface cable, please refer to the
pin diagrams in Appendix C as a guide.
DSL Span
Remote Model 1088
Straight-Through M/34
Cable
Model 1088/C (DCE)
Figure 5.
Connecting the Model 1088/C to V.35 Serial DTE
V.35 Router (DTE)
Connecting the Model 1088/C (V.35) to a “DCE” Device
The Model 1088/C provides a V.35 DCE (Data Circuit Terminating Equipment) interface on an M/34 female connector. As a DCE, this interface is
designed to connect to DTE equipment, such as a router. However, tailcircuit applications require connection to another DCE equipment, such
as a multiplexer. When connecting the V.35 interface of the Model 1088/
C to your DCE device (see Figure 6), use a V.35 null modem cable.
Some applications may also require the installation of a V.35 tail-circuit
buffer to account for small differences in clock frequency between the
1088/C and the V.35 DCE (Multiplexer).
DSL Span
Remote Model 1088
Model 1088/C (DCE)
Figure 6.
Connecting the Model 1088/C to V.35 Serial DCE
V.35 Multiplexer (DCE)
4.3 CONNECTING THE MODEL 1088/D (X.21) SERIAL INTERFACE
Model 1088/D supports X.21 serial port connections. This section
describes how to connect the serial ports to your X.21 equipment.
Connecting the Model 1088/D (X.21) to a “DCE” or “DTE” Device
The Model 1088/D provides an X.21 interface on a DB-15 female connector. The X.21 interface default configuration is DCE (Data Circuit Terminating Equipment) for connection to DTE (Data Terminal Equipment)
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such as a router. However, the X.21 interface on the Model 1088/D may
be configured as DTE (Data Terminal Equipment) for connection to DCE
such as a modem or multiplexer. When connecting the X.21 interface of
the Model 1088/C to your DTE device, use a X.21 str aight through cable
(See Figure 7).
DSL Span
Remote Model 1088)
Model 1088/D (DCE or DTE)
Straight-Through 15-pin
D-Sub Cable
Router (DTE)
OR
Mux (DCE)
Figure 7.
Connecting the Model 1088/D to X.21 DTE or DCE
To change the DCE/DTE orientation from the default position (DCE), you
must open the case Model 1088/D case.
Opening the Case
To open the Model 1088/D case, insert a flat head screw driver into an
open slot on both sides of the case, as in Figure 8. Twist the screw driver
head slightly and the top half of the case will separate from the lower
half, as in Figure 8. Be careful not to damage the PC-board mounted
components.
Figure 8.
Opening the 1088 Case with a Small Screwdriver
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The DCE/DTE strap is located on the top side of the 1088/D pc board
(See Figure 9, below). The arrows on the top of the strap indicate the
configuration of the X.21 port (for example, if the DCE arrows are pointing toward the DB-15 connector, the X.21 port is wired as a DCE).
Change the DCE/DTE orientation by pulling the strap out of its socket,
rotating it 180º, then plugging the strap back into the socket. You will see
that the DCE/DTE arrows now point in the opposite directions, showing
the new configuration of the X.21 port. To close the case, fit the 2 halves
together snugly and snap them back in place.
DB-15 Connector
Figure 9.
DCE/DTE Strap
Setting the DCE/DTE Strap
4.4 CONNECTING POWER
The Model 1088 (all versions) are available with Universal AC (100240VAC), 120VAC, 230VAC or -48VDC power options. This section
describes these options.
Universal AC Power (100–240 VAC)
The Model 1088 uses a 5 VDC, 2A universal input 100–240 VAC, 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.
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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 is supplied with the DC v ersion of the
Model 1088. 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 rear panel of the 1088. (See Figure 10).
To Power
Supply Jack
Barrel power connector
Figure 10.
WARNING
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
Connecting DC Power to the 48V-PSM DC Power Supply
-Vin
+Vin
To -48VDC
Source
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)9751007, via our web site at http://www.patton.com, or by
e-mail at support@patton.com, for more information.
Black lead (-V)
Red lead (+V)
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5.0 OPERATION
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 4.4, “Connecting Power” on page 16, and that the unit is connected
to the appropriate power source. Then power-up the unit.
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 11 shows the
front panel location of each LED. Following Figure 11 is a description of
each LED’s function. See also, LED description chart on page 19.
NetLinkTM10BaseT mDSL Rocket
DSL
Link
10BT
Status
NS
ER
TM
-511E/RDL
-Normal
-511/RDL
DSL Link
TD & RD
NS
ER
Figure 11.
Model 1088/K Front Panel
(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.
Glows yellow to indicate an idle condition of Binary “1” data on
the respective terminal interface signals. Green indicates Binary
“0” data
(No Signal) Glows red to indicate that the local Model 1088 is
not connected with the remote Model 1088.
• Blinks ON/OFF after a 511/511E test has timed out. See “Using
the V.52 (BER) Test Pattern Generator” on page 26 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).
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• Only at pow er up, blinks once ev ery 200 ms if the DTE Rate is
set to an unsupported settings
TM
Glows yellow to indicate that the Model 1095 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.
Model 1088 LED Descriptions Chart
Clock (CO) Internal 768Kb No DTE Clock (CP) R/R No DTE
TD RD DSL NS ER TM TD RD DSL NS ER TM
Power ON G O off ON off off O O off ON off off
DSL Link G O G off off off O G G off off off
Link Brk G O off off off off O O off off off off
Brk+ 10s G G off ON off off O O off ON off off
RDL G G G off off ON O G G off off ON
RDL+511 G G off off off ON O G off off off ON
With DTE Connected With DTE Connected
Mark O O G off off off O O G off off off
Space G G G off off off G G G off off off
Data GO GO G off off off GO GO G off off off
Link Brk = DSL Link Broken
Brk+10s = 10 Seconds following Link Break
G=GREEN
O=ORANGE
ON= ON
off= OFF
Y=yellow
Figure 12.
LED descriptions chart
5.3 TEST MODES
The Model 1088 offers two proprietary loopback test modes, plus a builtin 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 or via the DTE interface.
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Overview
Figure 13 shows the major elements used in the loop-back and pattern
tests available in the Model 1088. Each block has several functions. Following Figure 13 are descriptions that show how the elements are used
during T est Modes.
Framer
Pattern
Gen/Det
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, CTS and CD will be active. If framed packets
are not received, CTS and CD 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 Model 1088 receives 4 seconds of unframed
packets it will restart and begin trying to re-establish 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 b y 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 pack ets
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.
Processor
Figure 13.
Loop
Contr
Line
ol
Block Diagram Model 1088
Loop
Contro
l
Processor
Pattern
Gen/Det
Framer
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. 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.
Restart Procedure and Time Outs
The restart procedure is in place to allow the units to re-estab-
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lish 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 pac kets 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 reestablished. 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
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.)
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.
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5.4 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..
Framer
Framer
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 14. 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, CTS LED yellow, and CD LED yellow, 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.
Pattern
Gen/Det
Pattern
Gen/Det
Processor
Figure 14.
Processor
Figure 15.
Loop
Contr
ol
Block Diagram Local Loop Mode 1
Loop
Contr
Line
ol
Block Diagram Local Loop Mode 2
Line
Loop
Contro
Loop
Contro
l
Processor
l
Processor
Pattern
Gen/Det
Pattern
Gen/Det
Framer
Framer
A mode 2 Local Loop is shown in Figure 15. 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,
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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.
Framer
Framer
Pattern
Gen/Det
Figure 16.
Pattern
Gen/Det
Figure 17.
Processor
Block Diagram Local Loop Mode 1 with 511/511E
Processor
Block Diagram Local Loop Mode 2 with 511/511E
Local Loop with 511/511E
When the unit is placed into a Mode 1. Local Loop and the 511/
511E pattern generator is activated, the local pattern generator
begins sending out a 511/511E pattern to the Loop Control
block. The Loop Control b loc k will loop this data bac k 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).
Loop
Contr
Loop
Contr
l
Processor
l
Processor
Pattern
Gen/Det
Pattern
Gen/Det
Framer
Framer
Loop
Line
Line
Contro
Loop
Contro
ol
ol
After the 511/511E pattern times out, the ER led will begin
flashing. It will remain this w a y until the pattern generator switch
is turned off. Note that the data at the local DTE and the remote
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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. As can be seen from Figure 11, the 511/511E pattern generator has no data path connections 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.
Framer
Pattern
Gen/Det
Remote Digital Loop
The Remote Loop uses the EOC channel (an 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.
Loop
Contr
Processor
Figure 18.
ol
Block Diagram Remote Loop
Contro
l
Processor
Loop
Line
Pattern
Gen/Det
Framer
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Framer
Pattern
Gen/Det
Loop
Contr
ol
Contro
Loop
Line
Pattern
Gen/Det
l
Framer
Processor
Figure 19.
Block Remote Loop with 511/511E
Remote Digital Loop with 511/511E
The Remote Digital Loop with 511/511E is shown above. After
RDL is established the 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 b linking until the user
turns off the 511/511E switch.
Processor
Loop
Contr
Line
ol
Framer
Pattern
Gen/Det
Loop
Contro
Processor
l
Processor
Pattern
Gen/Det
Framer
Figure 20.
Block Diagram DataMode with 511/511E
Data Mode with 511/511E Pattern Generators
When the units enter DataMode it is possible to turn on the 511/
511E pattern generators on 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
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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.
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 1095’s built-in “511” generator and detector are
working properly.
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.
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APPENDIX A
SPECIFICATIONS
A.1 CLOCKING MODES
Internal, External, or Receive Recovered
A.2 DTE RATE
All 64k steps from 64 to 2304 kbps
A.3 DTE INTERFACE
V.35 (Model 1088/C), DCE Orientation;
X.21 (Model 1088/D), DCE or DTE Orientation depending upon orienta-
tion of PC-board mounted daughter board
A.4 DTE CONNECTOR
M/34 Female (Model 1088/C)
D-Sub-15 Female (Model 1088/D)
A.5 DIAGNOSTICS
V52 compliant (511/511E) pattern generator and detector with error
injection mode con-trolled by front panel switch, Local and Remote Loopback control by either a front panel switch or from the DTE interface
A.6 LED STATUS
The following LEDs are displayed on the front panel:
• DSL Link (Green Active) - DSL Link Active
• TD, RD (Yellow/Green) - Idle Yellow
• NS (Red Active) - No signal DSL Link
• ER (Flashing Red) - CRC error during nor-mal operation, bit error dur-
ing pattern gen-eration test
• TM (Active Yellow) - Test Mode Enabled
A.7 CONFIGURATION
Externally accessible dip switches or SNMP managed through 1095RC
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A.8 POWER
+5 VDC external desk top power supply, 90-260VAC, 50-60 Hz (Universal Input), 10W or -48 VDC
A.9 COMPLIANCE
FCC Part 15, CE, CTR1
A.10 TRANSMISSION LINE
Single T wisted Pair
A.11 LINE CODING
CAP (Carrierless Amplitude and Phase Modulation
A.12 LINE RATES (DSL LINE)
144, 272, 400, 528, 784, 1040, 1552, 2064, 2320 kpbs
A.13 LINE INTERFACE
Transformer coupled, 1500 VAC isolation
A.14 MDSL PHYSICAL CONNECTION
RJ-45, 2 wire, polarity insensitive pins 4 and 5
A.15 ENVIRONMENT
Operating temperature 0–50°C; humidity 5–95% non-condensing; altitude, 0–15,000 feet (0–4,600 m)
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APPENDIX B
FACTORY REPLACEMENT PARTS AND ACCESSORIES
Model # Description
1088/C V.35 mDSL Rocket (CAP)
1088/D X.21 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/C User Manual
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APPENDIX C
MODEL 1088/C INTERFACE PIN ASSIGNMENTS
V.35 Interface
(M/34 Female Connector)
(DCE Orientation)
Pin # Signal
B SGND (Signal Ground)
C RTS (Request to Send) (DTE Source)
D CTS (Clear to Send) (DCE Source)
E DSR (Data Set Ready) (DCE Source)
F CD (Carrier Detect) (DCE Source)
H DTR (Data Terminal Ready) (DTE Source)
L LLB (Local Line Loop) (DTE Source)
M TM (Test Mode) (DTE Source)
N RDL (Remote Digital Loop) (DTE Source)
P TD (Transmit Data) (DTE Source)
R RD (Receive Data) (DCE Source)
S TD/ (Transmit Data-B) (DTE Source)
T RD/ (Receive Data-B) (DCE Source)
U XTC (External Transmit Clock) (DTE Source)
V RC(Receiver Clock) (DCE Source)
W XTC/ (External Transmit Clock) (DTE Source)
X RC/ (Receiver Clock) (DCE Source)
Y TC (Transmitter Clock-A) (DCE Source)
AA TC/ (Transmit Clock-B) (DCE Source)
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APPENDIX D
MODEL 1088/D INTERFACE PIN ASSIGNMENTS
X.21 Interface
(D-Sub-15 Female Connector)
(DTE /DCE Orientation)
Pin # Signal
1 Frame Ground
2 T (Transmit Data-A) (DTE Source)
3 C (Control-A) (DTE Source)
4 R (Receive Data-A) (DCE Source)
5 I (Indication-A) (DCE Source)
6 S (Signal Element Timing-A) (DCE Source)
7 BT (Byte Timing-A) (DCE Source)
8 SGND (Signal Ground)
9 T/ (Transmit Data-B) (DTE Source)
10 C/ (Control-B) (DTE Source)
11 R/ (Receive Data-B) (DCE Source)
12 I/ (Indication-B) (DCE Source)
13 S/ (Signal Element Timing-B) (DCE Source)
14 BT/ (Byte Timing-B) (DCE Source)
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APPENDIX E
MODEL 1088/C AND 1088/D TRANSMISSION DISTANCE CHART
Table 3: Transmission Distance - Patton NetLink Model 1088
Transmission Distance - Patton NetLink Model 1088
No Cross Talk
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
2320 2112 - 2304 11500 2.2 3.5 15800 3.0 4.9
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
2320 2112 - 2304 5416 1.0 1.7 73000 1.4 2.2
26 AWG (0.4mm) 24 AWG (0.5mm)
Cross Talk (49 adjacent CAP pairs)
26 AWG (0.4mm) 24 AWG (0.5mm)
Copyright © 2000, 2006
Patton Electronics Company
All Rights Reserved.
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