Patton electronics 3080/V24 User manual

DIGITAL SHARING DEVICE
3080/V24
(CTS DSD-8)
INSTALLATION AND OPERATIONS MANUAL
Doc #: 124001UA
Part #: 07M3080-A
B
An ISO-9001
Certified Company
Copyright© 2000 Patton Electronics Co., All Rights Reserved
August 23, 2000

3080/V24
124001UA
i
PATTONELECTRONICSCO.INSTALLATION AND OPERATIONS MANUAL
PROPRIETARY NOTICE
The information contained herein is proprietary and confidential to Patton Electronics Co. Any reproduction or
redistribution of this publication, in whole or in part, is expressly prohibited unless written authorization is given by
Patton Electronics Co.
WARRANTY NOTICE
WARRANTIES: Patton Electronics Co. (hereafter referred to as Patton) warrants that its equipment is free from any
defects in materials and workmanship. The warranty period shall be two years from the date of shipment of
equipment. Patton’s sole obligation under its warranty is limited to the repair or replacement of the defective
equipment, provided it is returned to Patton, transportation prepaid, within a reasonable period. This warranty will not
extend to equipment subjected to accident, misuse, alterations or repair not made by Patton or authorized by Patton in
writing.
PUBLICATION NOTICE
This manual has been compiled and checked for accuracy. The information in this manual does not constitute a
warranty of performance. Patton reserves the right to revise this publication and make changes from time to time in the
content thereof. Patton assumes no liability for losses incurred as a result of out-of-date or incorrect information
contained in this manual.
RADIO AND TV INTERFERENCE
The Patton MSDs generate and use 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 Patton
MSDs have been tested and found to comply with the limits for Class A computing devices 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 Patton MSDs do cause interference to radio or television reception, which can be determined by
disconnecting the cables, the user is encouraged to try to correct the interference by one or more of the following
measures: moving the computing equipment away from the receiver, re-orienting the receiving antenna, and/or
plugging the receiving equipment into a different AC outlet (such that the computing equipment and receiver are on
different branches).
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.
SERVICE
All warranty and non-warranty repairs must be returned freight prepaid and insured to Patton Electronics. All returns
must have a Return Materials Authorization number on the outside of the shipping container. This number may be
obtained from Patton Electronics Technical Support at:
tel: [phone];
email: [email protected];
or, www: http://www.patton.com.
NOTE: Packages received without an RMA number will not be accepted.
Patton Electronics’ technical staff is also available to answer any questions that might arise concerning the installation
or use of your Patton MSDs. Technical Support hours: 8AM to 5PM EST, Monday through Friday.
Copyright© 2000 Patton Electronics Co., All Rights Reserved

3080/V24
124001UA
ii
INSTALLATION AND OPERATIONS MANUAL
PATTON ELECTRONICS CO.
EMISSION REQUIREMENTS
FCC CLASS A
Warning:Changesormodificationstothisunitnotexpresslyapprovedbytheparty
responsiblefor compliance could voidthe user’s authority tooperatethe equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of FCC rules. These limits are designed to provide
reasonableprotection againstharmfulinterference when theequipment is operatedin a
commercialenvironment.Thisequipmentgenerates,uses,andcanradiateradio frequency
energyand,ifnotinstalledandusedin accordancewiththeinstructionmanual, maycause
harmfulinterference toradiocommunications. Operation ofthis equipment ina residential
areaislikelytocause harmful interference in which case the user will be required to correct the
interferenceathisownexpence.
CANADIAN EMISSIONS
This digital apparatus does not exceed the Class A limits for noise emissions from a digital
apparatusset outin theRadio Interference Regulationsof theCanadian Department of
Communications.
Le present appareil numerique n’emet pas de bruits redioelectriques depassant les limites
applicables aux appareils numeriques de la Class A prescites dans le Reglement sur le
brouillage redioelectrique edicte par le ministere des Communications du Canada.
VDE Emissionen
Anhang2 zur Anlage 1 zur AmtsblVfg 243/1991
BescheinigungdesHerstellers/Importeurs
Hiermit wird bescheinigt, daß der/die/das
8 Port Digital Sharing Device, 3080/V24 (CTS DSD-8), 124000
(Gerät,Typ,Bezeichnung)
inÜbereinstimmungmit denBestimmungenderBMPT-AmtsblVfg243/1991 funkentstörtist.
DervorschriftsmäßigeBetrieb mancherGeräte(z.B.Meßsender)kann allerdingsgewissen
Einschränkungenunterliegen. Beachten Sie deshalb die Hinweise in der
Bedienungsanleitung.
DemZentralamtfürZulassungenimFernmeldewesenwurdedasInverkehrbringendieses
Gerätesangezeigtunddie Berechtigungzur Überprüfungder Serieauf dieEinhaltungder
Bestimmungeneingeräumt.
Patton Electronics Co.
7622 Rickenbacker Drive
Gaithersburg, Maryland, USA 20879
(NameundAnschriftdesHerstellers/Importeurs)

3080/V24
124001UA
iii
PATTONELECTRONICSCO.INSTALLATION AND OPERATIONS MANUAL
Table of Contents
CHAPTER 1 - OPERATION
Channel Clocking...............................................................................................................................1-1
Channel Interface .............................................................................................................................. 1-1
Anti-streaming....................................................................................................................................1-2
Channel Selection Modes .................................................................................................................1-3
Channel Tail Circuits .........................................................................................................................1-4
Interface Connections .......................................................................................................................1-4
Front Panel LEDs ..............................................................................................................................1-4
Channel Enable / Disable Switches ..................................................................................................1-4
Power Supply.....................................................................................................................................1-4
CHAPTER 2 - SETUP AND INSTALLATION
Power Connection .............................................................................................................................2-1
Factory Configuration Switch Settings ..............................................................................................2-1
Disassembly ......................................................................................................................................2-2
Installation..........................................................................................................................................2-2
Equipment Grounding (SW27-6).......................................................................................................2-2
CTS Delay (SW31-3,4,5)................................................................................................................... 2-3
Anti-Streaming (SW28-4,5,6 and SW29-3).......................................................................................2-3
Receive Data Mode (SW29-4) ..........................................................................................................2-3
Control Turn-Off Delay in “DATA” Switching Mode (SW29-1,2) ......................................................2-4
Switch on Data / Control (SW29-5,6)................................................................................................2-4
Internal Baud Rates (SW30-1,2,3,4).................................................................................................2-4
Fallback Clock Enable (SW-30-6) ..................................................................................................... 2-5
Fallback Clocking From Sub-Channel 6 (SW30-1,2,3).....................................................................2-5
Fallback Mode Selection (SW30-5)...................................................................................................2-5
TX Clock Source Selection (SW27--1,2,3)........................................................................................2-5
TX Clock Pin Selection (SW27-4) .....................................................................................................2-5
RX Clock Source Selection (SW28-1,2,3) ........................................................................................2-6
Tail Circuit Buffer (SW31-1) ..............................................................................................................2-6
Port DCE/DTE Selection (SW9 thru SW26) .....................................................................................2-7
Test Voltage Enable Pins 9 & 10 (JP4 & JP5)..................................................................................2-7
DTR / DSR Forced Active (JP6 thru JP14).......................................................................................2-8
FACTORY Test Jumpers (JP1, JP2 and JP3)..................................................................................2-8
APPENDIX
Typical Application............................................................................................................................ A-1
Typical Tail Circuit Configuration ..................................................................................................... A-1
Interface Pins Supported.................................................................................................................. A-1
Master DTE / Sub-Channel DTE Interface Flow Diagram............................................................... A-2
Master DTE / Sub-Channel DCE Interface Flow Diagram .............................................................. A-2
Master DCE / Sub-Channel DTE Interface Flow Diagram .............................................................. A-3
Master DCE / Sub-Channel DCE Interface Flow Diagram .............................................................. A-3
TECHNICAL SPECIFICATIONS...................................................................................................... A-4

3080/V24
124001UA
1-1 OPERATION
PATTON ELECTRONICS CO.INSTALLATION AND OPERATIONS MANUAL
CHAPTER 1 - OPERATION
The Patton 3080/V24 (CTS DSD-8) is a network enhancement accessory intended for high
speedsynchronous orasynchronous Modem, orport sharing applications. The3080/V24
(CTS DSD-8) allows for immediate expansion of a system without the requirement of
additional communication lines. The 3080/V24 (CTS DSD-8) allows any combination of up to
eight DCE or DTE devices to share a single DCE or DTE high speed link in a point-to-point or
multi-pointpollednetwork.
Channel Clocking
The Patton 3080/V24 (CTS DSD-8) is protocol transparent and operates in synchronous and
asynchronousenvironmentsat dataratesupto76,800bps, dependingoncablelengthand
attached equipment. Clocking can be derived from the Master Port clock, (pins 15 or 24 for
TXCand 17 for RXC), the internal clock generator or any Sub-Channel 1 through 6(pins 15 or
24 for TXC and 17 for RXC).
Fallback Clocking
IntheeventoflossofanexternallyprovidedclockoroptionallySub-Channel1DCDbecoming
inactive, the 3080/V24 (CTS DSD-8) has the ability to automatically fall back to the
predetermined internal baud rate clock or the Sub-Channel 6 RX Clock (pin 17).
Channel Interface
The 3080/V24 (CTS DSD-8) has nine DB-25 female connectors located on the rear of the unit.
Each connector is pinned with EIA RS-232, using RS-423 electrical characteristics. This
enablesextended cable driving distances,which often bypasses theneedfor line drivers.
Each port is DCE/DTE selectable, which eliminates the need for a crossover cable. DSR or
DTRcanadditionallybeforcedtotheactivestateindividuallyoneachSub-ChannelbyJumper
control.
Pwr SD RD
3080/V24
12345678
SUB-CHANNELSTATUS
FBC 1 2 3 4 5 6 7 8
ANTI-STREAM
1 2 3 4 5 6 7 8
ACTIVE

3080/V24
124001UA
1-2
INSTALLATION AND OPERATIONS MANUAL
OPERATION
PATTON ELECTRONICS CO.
Anti-streaming
A typical problem often encountered is a “STREAMING” remote terminal. The streaming
problem can tie up an entire circuit until the offending device has recovered or is powered
down. Astreaming conditionoccurs when aSub-Channel remains active,disrupting the
polling sequence. The 3080/V24 (CTS DSD-8) provides two user selectable modes of
controllinga streamingcondition, an automaticanti-streaming Abort Timerwith eight
selectable block lengths and a setting to disable anti-streaming for large data block transfers,
andamanualOperatorControlmode(frontpanelpushbuttonswitch).
Automatic Anti-streaming -AutomaticAnti-streamingwill block the asserted control signal
from the Sub-Channel Port, releasing the 3080/V24 (CTS DSD-8) to accept requests from any
otherSub-Channel that has not been locked outdueto a streaming condition. When a Sub-
Channelis locked out for streaming,avisual indication, by Sub-Channel, isprovidedon the
front panel. Any data sent to the Master Port by the streaming device will be lost, but data
will still be broadcast to locked out Sub-Channels . Once a Sub-Channel is locked out due to
streaming,theSub-Channelwillremainlockedoutuntiltheattacheddeviceremovesthe
streaming condition. When configured for “Switch on RTS” Mode, if RTS is held active, RTS
mustbecome inactive. When configured for “Switch onData”Mode, if continuous data
transitions have triggered the Anti-Stream logic, the transitions must stop before the DSD-8
willcleartheAnti-StreamlogictothatSub-Channel. RemovingtheSub-Channelviathefront
panel disable switch will not clear the Anti-stream logic for a Sub-Channel once it has been
activated.
Manual Anti-Stream - If manual Anti-Stream protection is chosen, a streaming condition
caused by one of the attached terminals can be quickly corrected by the 3080/V24 (CTS
DSD-8) via the associated front panel locking switches. A switch is provided for each Sub-
Channelandpermitstherapidremovalofastreamingterminalwithouthavingtodisconnect
anycablesor powerdown theoffending terminal. Terminalsmaybeselectivelyremoved for
self-testandmaintenancewithoutaffectingtheremainingSub-Channels. Oncethestreaming
condition has been corrected, the front panel switch is simply depressed to the locked
(Enable) position (Green indicator ON) to re-establish normal operation. Removing a Sub-
Channelwiththefrontpanelswitchwill blockdatafromtheSub-Channelgoing totheMaster
Portbut will not block data going from the Master Port to theSub-Channel.
Channel Selection Modes
The 3080/V24 (CTS DSD-8) provides two selectable Sub-Channel service modes of
operation, the Scanning Mode and Priority Mode. Depending on system requirements, either
modemaybeselectedby internal DIP switch settings. Both modes switch on activity from the
Sub-Channel.

3080/V24
124001UA
1-3 OPERATION
PATTON ELECTRONICS CO.INSTALLATION AND OPERATIONS MANUAL
In the Scanning Mode the 3080/V24 (CTS DSD-8) scans each Sub-Channel, in sequence,
beginningwithSub-Channel1. Thisrotationalsequenceisrepeatedcontinuallywitheach
attachedSub-Channelhavingequalaccesstothecommunicationslink. Whendataorcontrol
linesfromaSub-Channelbecomeactive thatSub-Channelisswitchedthroughtothemaster
port by the 3080/V24 (CTS DSD-8). All remaining Sub-Channels are locked out until the first
device becomes inactive. When the Sub-Channel device becomes inactive, the 3080/V24
(CTSDSD-8)willresumescanningthe Sub-Channelsforanother activesignal.
When configured for Priority Mode operation, the 3080/V24 (CTS DSD-8) monitors all Sub-
ChannelssimultaneouslywithSub-Channel1havingthehighestpriority. WhenaSub-Channel
becomes inactive, the 3080/V24 (CTS DSD-8) will automatically default to the highest priority
(lowestnumber)Sub-Channelwithactivity.
Contention for the Master port is accomplished by asserting RTS (Request to Send) if the
Sub-Port is configured as a DCE, DCD (Data Carrier Detect) if the Sub-Port is configured as
aDTE or Data Transitions from the attached Sub-Channel devices in either configuration. The
active interface lead RTS or DCD can be selected on an individual basis for each Sub-
channel,selection of contention mode, “DataTransitions” or “InterfaceLead” activation is
selectedinSub-channelgroups. Sub-channels1thru4 arethefirstgroupandSub-channels 5
thru8 are the second group. All Sub-channels in a group will be settothesame contention
mode, either “Data Transitions” or “Interface Lead” activation. Once a Sub-Channel asserts
anactivecontrolsignal, thatcontrol signalwill bepassed throughtothe MasterPort,
depending on DTE / DCE configuration of the Sub-Channel and Master Port. This control will
be passed without delays. If the Master Port is configured as a DTE the signal will be passed
as RTS. The CTS returned to the Master will have an optional delay added before the signal is
returnedtotheSub-Channelport.
Port Enable / Disable, front panel switches must be pushed in (GREEN indication) for a Sub-
Channel to access the Master Port regardless of the mode of operation selected.
Channel Tail Circuits
A buffer is built into the unit for tail circuit (DCE to DCE) applications. An 8 bit centered ring
buffer is used to correct the clock phasing errors generated between the Modem on the
MasterPortandtheSub-Channelportforthedatatransferred fromtheSub-Channeltothe
MasterPort. Iftheunitisoperatedinanasynchronousenvironmentthebuffermustbe
bypassed. This is accomplished by moving the SYNC/ASYNC switch to ASYNC.

3080/V24
124001UA
1-4
INSTALLATION AND OPERATIONS MANUAL
OPERATION
PATTON ELECTRONICS CO.
Interface Connections
All connections are made via industry standard EIA RS-232 DB-25 female connectors located
ontherearofthe unit. The following interface leads are implemented, Chassis (1), TXD (2),
RXD (3), RTS (4), CTS (5), DSR (6), Sig Gnd (7), DCD (8), Plus Unreg (9), Minus Unreg (10),
TXC (15), RXC (17), DTR (20), XTXC (24). Pins 9 & 10 can be disabled by Jumpers on the
PCB.
Front Panel LEDs
Front panel LEDs are provided to indicate power is applied, RXD and TXD activity from the
MasterPort, Sub-Channel activityof each individual Port,Anti-Stream condition of eachSub-
Channeland an indication of clockfallbackcondition.
Channel Enable / Disable Switches
FrontpanelswitchesallowoperatorinterventiontoremoveanindividualSub-Channelfrom
accessing the Master Port. Positive latching type switches are provided for each Sub-
Channelport for isolating orremoving a streaming terminal. TheSub-Channelis activated by
pushingthe switch until it isinthe “IN”position. Theswitch will indicateGREEN incolor. To
disablea Sub-Channel push the switch until it locks in the “OUT” position, the switch will
indicate BLACK in color. Disabling a Sub-Channel with the front panel does not prevent the
Sub-Channelfrom receiving data fromthe Master Port onlyfromsending data to theMaster
Port.
Power Supply
Alinear power supply is located internally, an external 110/220VA switch is located on therear
of the unit. If chassis ground and signal ground need to be tied together this can also be
accomplished by switch selection. The unit is Rackmountable for 19" (or optional 23")
cabinets, by using the included Rackmount Kit. Safety approvals granted are UL, CSA and
TÜV. Emission approvals for FCC Class A and VFG243 have also been granted.

3080/V24
124001UA
2-1 SETUP & INSTALLATION
PATTON ELECTRONICS CO.INSTALLATION AND OPERATIONS MANUAL
Caution,DisconnectthePOWERBeforeRemovingTheCover
Vorsicht,BeforDeckungAbnehmenMachStromZu.
CHAPTER 2 - SETUP AND INSTALLATION
Power Connection
Before connecting the 3080/V24 (CTS DSD-8) to a AC power source the top cover must be
installed and secured with the supplied #8-32 screws. The unit is supplied with a 110/220VA
voltageswitch,turnthe switchwith acoin orscrew drivertothe appropriatevoltage foryour
country. Iftheunitissetto110Vinsurethat
the fuses are 0.16A Slow Blow (Little Fuse
218.160). For 220V operation use 0.08A
(Little Fuse 218.080) Slow Blow fuses.
EXAMPLE: United States of America; set
to 110VA. The unit is supplied with a IEC
powerconnectornexttothevoltageselect
switch,plugthepowercordintothe
connectoruntilitisfirmlyseated. You
maynowconnect thepower cordinto
yourACoutlet.
Factory Configuration Switch Settings
The 3080/V24 (CTS DSD-8) is configured prior to shipment with the switches set to the
followingdefaultpositions:
Switch 27 - 6 OFF, 1,2,3,4 and 5 ON.
TX Clock Source = Master, pin 15
ChassisGroundnotconnected toSignalGround
Switch 28 - 4 and 5 OFF, 1,2,3 and 6 ON.
RX Clock Source = Master
Anti-Stream timer = 16K bits
Switch 29 - 1, 2 and 4 to OFF, 3,5 and 6 ON.
No Data Time Out = 2048 bits
Anti-Stream = Enabled
Broadcast Data to Sub-Channels
Sub-ChannelActivityIndicatedbyInterfaceControl(RTS/DCD)
110 / 220VA Switch
Fuse Drawer
MASTER DTE/ DCE
IEC Power Connector
110
220

3080/V24
124001UA
2-2
INSTALLATION AND OPERATIONS MANUAL
SETUP & INSTALLATION
PATTON ELECTRONICS CO.
Switch 30 - 1 and 2 OFF, 3, 4, 5 and 6 ON
InternalBaudRate=9600,Normal
Fallback Clock Source = Data Transitions
Fallback Clock = Disabled
Switch 31 - 2 and 3 to OFF, 1,4,5 and 6 to ON
SyncMode
Contention Mode = Scan
CTS Delay = 1 mS
If the system application requires one or more of the default settings to be changed, it will be
necessaryto remove the top cover of the enclosure to access and changetheDIPswitches
located on the printed circuit board.
Disassembly
Remove the top cover by removing the phillips head screws located on the left and right sides
of the 3080/V24 (CTS DSD-8). DTE/DCE switches SW9 through SW26, interface Jumpers
J4 through J14 and configuration switches SW27 through SW31 are located on the PCB as
indicated on the strapping guide in the Appendix of this manual. After the switch selection
activity is completed, re-install the top cover BEFORE connecting to a AC power source .
Installation
Select an appropriate location accessible to and within six feet of an AC power outlet, the
outletmusthavea groundpin receptaclefor productwarranty. The DCE-to-DTEcabling
between each attached device and the 3080/V24 (CTS DSD-8) should be “Straight Through”,
shieldedandterminated withmale connectors. Sub-Channelsare markedPORT1through
PORT 8, the Master Port is marked, MASTER DCE/DTE. If any terminal has a priority service
mode, ensure it is connected to the port connector designated “PORT 1” on the rear panel of
the 3080/V24 (CTS DSD-8). Secure other terminals or Modems to be serviced to the
remaining“PORT”connectors. ConnecttheMODEMorTERMINALtotheconnector
designated “MASTER DTE/DCE”.
Equipment Grounding (SW27-6) (default OFF)
SwitchSW27-6 provides for grounding interconnection in those systems requiring a
connectionbetween(FrameGround)and(SignalGround). ConnectONLYifrequired.