Patton electronic Modem 1088 C User Manual

USER  
MANUAL  
MODEL 1088/C  
and 1088/D  
mDSL Modem with  
V.35 or X.21 Interface  
Part# 07M1088-UM  
Doc# 03312U2-001  
Rev. E  
SALES OFFICE  
(301) 975-1000  
TECHNICAL SUPPORT  
(301) 975-1007  
Revised 10/23/06  
An ISO-9001Certified  
Company  
 
A.9 Compliance ................................................................................. 28  
A.12 Line Rates (DSL line) .................................................................. 28  
A.14 mDSL Physical Connection ........................................................ 28  
A.15 Environment ................................................................................ 28  
B
C
D
E
Factory Replacement Parts and Accessories........................ 29  
Model 1088/C Interface Pin Assignments............................... 30  
Model 1088/D Interface Pin Assignments............................... 31  
Model 1088/C and 1088/D Transmission distance chart....... 32  
3
 
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 specifi-  
cally disclaims all other warranties, expressed or implied, and the instal-  
lation 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  
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 manu-  
facturer'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 specifica-  
tions in Subpart J of Part 15 of FCC rules, which are designed to provide  
reasonable protection from such interference in a commercial installa-  
tion. 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 Cer-  
tificate of Compliance is available by contacting Technical Support.  
4
 
     
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 Materi-  
als Authorization number on the outside of the shipping container. This  
number may be obtained from Patton Electronics Technical Services at:  
Tel: +1 (301) 975-1007  
Note Packages received without an RMA number will not be  
accepted.  
Note The Model 1088 is flash upgradeable. Please refer to Patton  
website, or contact Technical Support for the latest version of  
the software.  
5
 
 
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 Pat-  
ton 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 Rocket provides high speed 2-wire connectiv-  
ity to ISPs, PTTs, and corporations using mDSL (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. Supporting mul-  
tiple line rates from 144 kbps to 2.320 Mbps, the NetLink provides “mega-  
byte” speeds to leased line, LAN to LAN interconnection, and WAN access  
networks over 3.6 miles/5.8 km (1.054 Mbps on 24AWG/.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 female connector. Features  
include loopback diagnostics, SNMP/HTTP remote management capabilities  
using NetLink Plug-and-Play and inband externally accessible configuration  
switches. All versions of the Rocket 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 by an RJ-  
45 jack. Standard versions of Model 1088 are powered by a 100/230 VAC  
(Universal) supply.The DC power supply option supports any DC input  
between 36–72 VDC.  
6
 
     
3.0 CONFIGURATION  
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 (See  
Figure 1).  
Front  
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)  
7
 
     
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 diag-  
nostics. Default settings of S1 switches are shown in Table 1.  
Table 1: S2 Summary Table  
Position  
S2-1  
Function  
Factory Default  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Off  
Off  
Off  
Off  
Off  
S2-2  
S2-3  
S2-4  
S2-5  
S2-6  
S2-7  
S2-8  
Clock Mode  
On  
Off  
Off  
Receive  
Recover  
Disabled  
Clock Mode  
Enable Loop from DTE  
Switch S2-1, S2-2, S2-3, S2-4, and S-5. 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  
Off  
On  
On  
Internal  
Transmit clock gener-  
ated internally  
CO  
CP  
External (DTE)  
Transmit clock derived  
from terminal interface  
On  
Off  
Off  
Off  
Receive Recover  
Transmit clock derived  
from the received line  
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  
8
 
         
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  
Off  
DTE Loopback Request Enabled  
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  
S3-1  
S3-2  
S3-3  
S3-4  
S3-5  
S3-6  
S3-7  
S3-8  
Function  
DTE Rate  
Factory Default  
On  
Off  
Off  
DTE Rate  
DTE Rate  
768 kbps  
DTE Rate  
Off  
DTE Rate  
On  
DTE Rate  
On  
Reset Software Defaults  
Transmit Data Sample Point  
On Normal Operation  
On 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  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
On  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
Off  
Off  
On  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
64  
128  
192  
256  
320  
384  
448  
512  
576  
640  
704  
9
 
   
S3-1 S3-2 S3-3 S3-4 S3-5 S3-6 DTE Rate (kbps)  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
On  
On  
On  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
768  
832  
896  
960  
1024  
1088  
1152  
1216  
1280  
1344  
1408  
1472  
1536  
1600  
1664  
1728  
1792  
1856  
1920  
1984  
2048  
2112  
2176  
2240  
2304  
Note Based on the DTE rate chosen, the Model 1088 will automati-  
cally 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  
Off  
Normal Operation  
Reset  
10  
 
 
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 Transmit  
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 cus-  
tomer to re-configure the Customer Premise (CP) Model 1088. This fea-  
ture 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 rack-  
mounted NetLink Model 1095RC as the CO unit.  
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.  
1088  
(CP)  
DSL Span  
1095RC  
(CO)  
DIP Switches all in ON position  
DIP Switches or NMS configured  
according to specific application  
requirements  
Figure 3. Typical NetLink Plug-and-Play Application  
11  
 
     
When the CO and CP units connect over DSL, the CP will enter a pre-  
defined 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.  
12  
 
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 polar-  
ity insensitive and is wired for a two-wire interface. The signal/pin rela-  
tionships 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)  
1
2
3
4
5
6
7
8
7 (N/C)  
8 (N/C)  
Figure 4. 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 Equip-  
ment) interface on an M/34 female connector. As a DCE, this interface is  
designed to connect to DTE equipment, such as a router. When connect-  
ing the V.35 interface of the Model 1088/C to your DTE device, use a  
13  
 
         
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)  
V.35 Router (DTE)  
Figure 5. Connecting the Model 1088/C to V.35 Serial DTE  
Connecting the Model 1088/C (V.35) to a “DCE” Device  
The Model 1088/C provides a V.35 DCE (Data Circuit Terminating Equip-  
ment) interface on an M/34 female connector. As a DCE, this interface is  
designed to connect to DTE equipment, such as a router. However, tail-  
circuit 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)  
V.35 Multiplexer (DCE)  
Figure 6. Connecting the Model 1088/C to V.35 Serial 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 con-  
nector. The X.21 interface default configuration is DCE (Data Circuit Ter-  
minating Equipment) for connection to DTE (Data Terminal Equipment)  
14  
 
         
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 straight through cable  
(See Figure 7).  
DSL Span  
Remote Model 1088)  
Straight-Through 15-pin  
D-Sub Cable  
Router (DTE)  
OR  
Mux (DCE)  
Model 1088/D (DCE or DTE)  
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  
15  
 
     
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 point-  
ing 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  
DCE/DTE Strap  
Figure 9. Setting the DCE/DTE Strap  
4.4 CONNECTING POWER  
The Model 1088 (all versions) are available with Universal AC (100-  
240VAC), 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 interna-  
tional 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.  
16  
 
     
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 version 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 sup-  
ply jack on the rear panel of the 1088. (See Figure 10).  
To Power  
To -48VDC  
Supply Jack  
Source  
-Vin  
Black lead (-V)  
Red lead (+V)  
+Vin  
Barrel power connector  
Figure 10. Connecting DC Power to the 48V-PSM DC Power Supply  
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. Con-  
tact Patton Electronics Technical support at (301)975-  
e-mail at [email protected], for more information.  
WARNING  
17  
 
     
5.0 OPERATION  
Once the Model 1088 is properly configured and installed, it should oper-  
ate 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 sec-  
tion 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  
Link  
-511E/RDL  
-Normal  
DSL  
Status  
NS  
10BT  
ER  
TM  
-511/RDL  
Figure 11. Model 1088/K Front Panel  
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.  
TD & RD  
Glows yellow to indicate an idle condition of Binary “1” data on  
the respective terminal interface signals. Green indicates Binary  
“0” data  
NS  
(No Signal) Glows red to indicate that the local Model 1088 is  
not connected with the remote Model 1088.  
ER  
• 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).  
18  
 
     
• Only at power up, blinks once every 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  
TD RD DSL NS ER TM  
Clock (CP) R/R No DTE  
TD RD DSL NS ER TM  
off ON off off  
off off off  
Power ON G  
DSL Link G  
Link Brk G  
Brk+ 10s G  
O
O
O
G
off ON off off  
off off off  
O
O
O
O
O
O
O
G
G
G
off off off off  
off ON off off  
O off off off off  
O off ON off off  
RDL  
G
G
G
off off ON  
G
G
off off ON  
RDL+511  
G
G
off off off ON  
G off off off ON  
With DTE Connected  
With DTE Connected  
Mark  
Space  
Data  
O
G
O
G
G
G
G
off off off  
off off off  
off off off  
O
O
G
G
G
G
off off off  
off off off  
off off off  
G
GO GO  
GO GO  
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 built-  
in V.52 BER test pattern generator to evaluate the condition of the  
modems and the communication link. These tests can be activated phys-  
ically from the front panel or via the DTE interface.  
19  
 
     
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. Fol-  
lowing Figure 13 are descriptions that show how the elements are used  
during Test Modes.  
Pattern  
Gen/Det  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Framer  
Line  
Processor  
Figure 13. Block Diagram Model 1088  
Processor  
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 pro-  
cedure 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 connec-  
tion 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. 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-  
20  
 
   
lish a connection after the framer begins seeing unframed pack-  
ets. 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 pat-  
tern will be valid. At the end of this time the pattern will automat-  
ically 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  
Test Mode Timing  
Elapsed Time (seconds)  
Item  
Start Up  
50  
4
Data Mode  
511/511E Generator Enabled 60 (The generator will stop after 45 seconds.)  
Remote End of an RDL  
511/511E Time Out  
60  
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.  
21  
 
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..  
Pattern  
Gen/Det  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Framer  
Line  
Processor  
Processor  
Figure 14. Block Diagram Local Loop Mode 1  
Pattern  
Gen/Det  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Framer  
Line  
Processor  
Figure 15. Block Diagram Local Loop Mode 2  
Processor  
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.  
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,  
22  
 
     
data presented at the far end DTE will be transmitted to the  
local DTE and then looped back within the local DTE Loop Con-  
trol 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.  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Pattern  
Gen/Det  
Framer  
Line  
Processor  
Processor  
Figure 16. Block Diagram Local Loop Mode 1 with 511/511E  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Pattern  
Gen/Det  
Framer  
Line  
Processor  
Processor  
Figure 17. 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 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 proce-  
dure 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 pack-  
ets (and not restart the box).  
After the 511/511E pattern times out, the ER led will begin  
flashing. It will remain this way until the pattern generator switch  
is turned off. Note that the data at the local DTE and the remote  
23  
 
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 transmis-  
sion. As can be seen from Figure 11, the 511/511E pattern gen-  
erator 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" sec-  
tion.  
Pattern  
Gen/Det  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Framer  
Line  
Processor  
Processor  
Figure 18. Block Diagram Remote Loop  
Remote Digital Loop  
The Remote Loop uses the EOC channel (an out-of-band sig-  
naling channel) to establish the remote link. Upon the RDL  
switch being thrown or DTE initiation, a RDL_ON Request sig-  
nal 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.  
24  
 
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Pattern  
Gen/Det  
Framer  
Line  
Processor  
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 gen-  
erator 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 genera-  
tor 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.  
Loop  
Control  
Loop  
Control  
Framer  
Pattern  
Gen/Det  
Pattern  
Gen/Det  
Framer  
Line  
Processor  
Processor  
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 gen-  
erator 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-pat-  
tern generator within 4 seconds, the Remote unit will Restart  
and enter the StartUp mode. Note that once the 511/511E-pat-  
tern generator is started the Restart timer is changed to one  
minute (only on the unit which has the pattern enabled). If both  
25  
 
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 Loop-  
back 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 trans-  
mits 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 tog-  
gle 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.  
26  
 
 
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 Loop-  
back 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  
27  
 
               
A.8 POWER  
+5 VDC external desk top power supply, 90-260VAC, 50-60 Hz (Univer-  
sal Input), 10W or -48 VDC  
A.9 COMPLIANCE  
FCC Part 15, CE, CTR1  
A.10 TRANSMISSION LINE  
Single Twisted 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; alti-  
tude, 0–15,000 feet (0–4,600 m)  
28  
 
               
APPENDIX B  
FACTORY REPLACEMENT PARTS AND ACCESSORIES  
Model #  
Description  
1088/C  
1088/D  
080551  
080552  
48V-PSM  
V.35 mDSL Rocket (CAP)  
X.21 mDSL Rocket (CAP)  
120V Power Supply  
230V Power Supply  
DC Power Supply Module  
08055DCUI 100-240VAC (+5V ±5% reg. DC/2A) Universal Input Adapter  
0805EUR  
0805UK  
0805US  
0805AUS  
0805DEN  
0805FR  
0805IN  
European Power Cord CEE 7 (“A”)  
United Kingdom Power Cord (“D”)  
American Power Cord (“K”)  
Australia/New Zealand Power Cord (“C”)  
Denmark Power Cord (“E”)  
France/Belgium Power Cord (“F”)  
India Power Cord (“G”)  
0805IS  
Israel Power Cord (“H”)  
0805JAP  
0805SW  
Japan Power Cord (“J”)  
Switzerland Power Cord (“L)  
07M1088/C User Manual  
29  
 
 
APPENDIX C  
MODEL 1088/C INTERFACE PIN ASSIGNMENTS  
V.35 Interface  
(M/34 Female Connector)  
(DCE Orientation)  
Pin #  
Signal  
SGND (Signal Ground)  
B
C
D
E
RTS (Request to Send) (DTE Source)  
CTS (Clear to Send) (DCE Source)  
DSR (Data Set Ready) (DCE Source)  
CD (Carrier Detect) (DCE Source)  
DTR (Data Terminal Ready) (DTE Source)  
LLB (Local Line Loop) (DTE Source)  
TM (Test Mode) (DTE Source)  
F
H
L
M
N
P
RDL (Remote Digital Loop) (DTE Source)  
TD (Transmit Data) (DTE Source)  
R
S
RD (Receive Data) (DCE Source)  
TD/ (Transmit Data-B) (DTE Source)  
RD/ (Receive Data-B) (DCE Source)  
XTC (External Transmit Clock) (DTE Source)  
RC(Receiver Clock) (DCE Source)  
XTC/ (External Transmit Clock) (DTE Source)  
RC/ (Receiver Clock) (DCE Source)  
TC (Transmitter Clock-A) (DCE Source)  
TC/ (Transmit Clock-B) (DCE Source)  
T
U
V
W
X
Y
AA  
30  
 
 
APPENDIX D  
MODEL 1088/D INTERFACE PIN ASSIGNMENTS  
X.21 Interface  
(D-Sub-15 Female Connector)  
(DTE /DCE Orientation)  
Pin #  
Signal  
1
2
Frame Ground  
T (Transmit Data-A) (DTE Source)  
C (Control-A) (DTE Source)  
3
4
R (Receive Data-A) (DCE Source)  
I (Indication-A) (DCE Source)  
5
6
S (Signal Element Timing-A) (DCE Source)  
BT (Byte Timing-A) (DCE Source)  
SGND (Signal Ground)  
7
8
9
T/ (Transmit Data-B) (DTE Source)  
C/ (Control-B) (DTE Source)  
10  
11  
12  
13  
14  
R/ (Receive Data-B) (DCE Source)  
I/ (Indication-B) (DCE Source)  
S/ (Signal Element Timing-B) (DCE Source)  
BT/ (Byte Timing-B) (DCE Source)  
31  
 
 
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  
kbps  
144  
DTE Rates  
26 AWG (0.4mm) 24 AWG (0.5mm)  
feet miles km feet miles km  
21400 4.0 6.6 30700 5.8 9.4  
20300 3.8 6.2 30600 5.8 9.4  
64, 128  
192, 256  
320, 384  
448, 512  
272  
400  
528  
18600 3.5 5.7 29100 5.5  
9
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, 102415500 2.9 4.8 22100 4.2 6.8  
1552  
2064  
2320  
1088 - 1536  
1600 - 2048  
2112 - 2304  
13600 2.6 4.2 19200 3.6 5.9  
12200 2.3 3.8 17200 3.3 5.3  
11500 2.2 3.5 15800 3.0 4.9  
Cross Talk (49 adjacent CAP pairs)  
26 AWG (0.4mm) 24 AWG (0.5mm)  
feet miles km feet miles km  
16992 3.2 5.2 25000 4.7 7.7  
15088 2.9 4.6 22000 4.2 6.8  
13264 2.6 4.2 20000 3.8 6.2  
12300 2.3 3.8 18000 3.4 5.5  
Line Rate  
kbps  
144  
DTE Rates  
64, 128  
192, 256  
320, 384  
448, 512  
272  
400  
528  
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  
2064  
2320  
1088 - 1536  
1600 - 2048  
2112 - 2304  
7107 1.3 2.2 10000 1.9 3.1  
5920 1.1 1.8 8000 1.5 2.5  
5416 1.0 1.7 73000 1.4 2.2  
Copyright © 2000, 2006  
Patton Electronics Company  
All Rights Reserved.  
32  
 
 

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