3Com S200 Network Parity Application Response Delay DTR Timeout, Atpad Application Environment

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ATPAD Ports

Network Parity Application

Response Delay

DTR Timeout

The application that the network parity feature has been designed for is as follows. An async device is directly connected to the ATPAD, and a call is made to an X.25 host. The ATPAD port currently strips parity on the incoming async data, so that the data on the X.25 link is always 8 bits, no parity. Normally, the PAD at the remote site would regenerate parity when it transmits the data. In this application, the connection is to an X.25 host, which is expecting the data to be 7 bits, even parity.

This enhancement allows for selection of the parity requirements for data transmission. This configuration is shown in Figure 12.

Async

Network

X.25

 

PC

Access

8 Bits, No Parity

X.25

7 Bits

Product

Host

Even Parity

 

 

 

Figure 12. ATPAD Application Environment

If it is necessary to slow down the responses sent by an ATPAD port, you can configure Response Time using this CSK: BSYJWMYCCCKK6HE9NKEE. This CSK causes all ATPAD ports on the node to delay sending responses to commands for a period of 1 second.

This feature is designed for this situation. If an automated device that you are using to send commands to an ATPAD port has trouble recognizing the responses when they arrive too quickly, this feature will delay responses. This feature is not recommended when the commands are being issued by a human operator.

Note

The ATPAD does not have type-ahead capability, so commands that are sent before the response to the previous command has been received are ignored.

The standard timeout period for DTR Connection Type is 1.5 seconds. This means that DTR is not recognized as being in the OFF state until it has been OFF for a continuous period of 1.5 seconds. If you need a shorter timeout period, you can configure it using this CSK: DTZEFG4JHTQY2HCFBJ66.

This CSK will change the timeout period for all ports on the node with DTR Connection Type to 100 ms. To guarantee reliable operation in this mode, a minimum OFF time of 150 ms for DTR is recommended.

60

Configuring PAD/ATPAD Ports

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Contents 3Com Corporation Restricted Rights Notification for U.S. Government Users Restricted Rights LegendProprietary Material Page Contents Page Introduction Configuring PAD/ATPAD PortsOverview Before You BeginAbout Packet Assembler/Disassembler Typical Applications ExamplePAD Port Configuration Configuration RecordPAD Port Guidelines If You Specify or Set ThenStep Action Result Parameters Connection TypeUse Connection Type When Use Connection Type Port ControlCRONLY, CRDOTCR, TYMNET, Telenet Port SpeedAuto Baud Sequence CronlyNONE, SPAC, MARK, EVEN, ODD, Auto Data Bits per CharacterDevice Parity Number of Stop BitsCall Control NONE, AUTO, AUTC, PCUD, IBAR, OBAR, MNEM, TmnemTerminal Control NONE, PASS, LIM, CUG, LCPY, 7BIT, NADD, X.28, CnuiCUGOA, BMSG, ADDR, FRCB, Cugia Remote PAD Parameters Number Autocall Timeout secPAD Prompt Entry Number Autocall MnemonicGroup Subaddress Maximum Number of Autocall AttemptsSubaddress CUG MembershipCall Accept Timeout sec Billing RecordsInvitation to clear NONE, CPONLY, Fulldcp Reconnection TimeoutProtection Level Reconnection Tries LimitCalled DTE Address Calling DTE PasswordMaximum Receive Buffer Length Calling DTE IdentifierNUI Facility Format PAD Command LanguageNUI verification timer Max NUI violationsAction Type for NUI violations NONE, DISC, DEGR, LockPAD Port Configuration for Autocalling Initiating an AutoCall Mnemonic AddressingSdlc Mnemonic Addressing Sdlc Mnemonic Autocall AddressingPAD Port Configuration for Autospeed PAD XON/OFF Support Using X.25 Interrupt Packets How It WorksStep Action What You See Before You Begin Accessing the PAD Prompt Table RecordPAD Prompt Table Record This RecordPAD Prompt Table Record Parameters Entry NumberPAD Prompt Text PAD Profile Table Record Introduction What You See In This RecordConfiguration Guidelines Accessing the PAD Profile Table RecordSelect PAD Profile Table from PAD Profile Table Record Parameters #1, PAD Recall#4, Idle Timer Delay #2, Echo#3, Data Forwarding Character #6, Service Signals Control #5, Device Flow Control#7, Break Signal Operation #9, Padding After Carriage Return#10, Line Folding #12, PAD Data Restraint #13, Line Feed Insertion after CR#16, Character Delete #14, Padding after LF#15, Editing #17, Line Delete#18, Line Display #19, Editing Type#20, Echo Mask #21 Parity Treatment#101, Echo Substitution Toggle Character #22, Page Wait#100, Break Character #102, Echo Substitution Character#105, Control Signal EIA-232-D Data Restraint #103, XON Character#104, Xoff Character #107, Idle Disconnect Timer #106, Network Parity#108, Disconnect Character #110, Esc Forwarding Delay Handling #109, Form Feed Padding#111, Echo Control #112, Dynamic Data Forwarding#113, Hewlett-Packard Flow Control #114, PAD Mode #116, Short Timer Duration#115, Data Forwarding Criteria #117, EIA Signalling Action #118, Message Assembly#119, DCD to Data Timer Duration Size Copying PAD Profile Tables into a ConfigurationPAD Profile Table Select Copy/Insert RecordParameter Name Default Test Simple Transpar Parameter Values Stored In MemoryPrinter Parameter Name TPA Hpea Hpxon Host RmotTPA Hpea Hpxon Host Rmot Parameter INT1984 IRANSP1 PAD BulletinMessage Remote PAD Parameter Table Record Select Remote PAD ParameterRemote PAD Parameter Table Record Parameters #1 Parameter Number #1 Parameter Value Description Terms First Screen Detailed PAD Port StatisticsFunction Screen Term Tells YouNull Example of Detailed PAD Port Statistics, Second ScreenDescription Terms Second Screen Example of Detailed PAD Port Statistics, Third Screen Atpad Ports Criteria Descriptions Atpad OperationData Forwarding Criteria If you want to Then useFlow Control XON/XOFFNetwork Parity Application Response Delay DTR Timeout Atpad Application EnvironmentConfiguration Use these guidelines when you enter Atpad commandsConfigure Atpad Port Menu PAD Port TypeNULL, PAD, X25, SDLC, FRI, ATPAD, PPP SIMP, DTRNONE, SPAC, MARK, EVEN, ODD Data BitsParity Stop BitsBack Space Character Carriage Return CharacterLine Feed Character Data Forwarding CharacterXON Character Escape Sequence TimerData Forwarding Timer NONE, CNTL, XoffEcho Answer ModePacket Size Stored AddressesAlpha Result CodesALPHA, NUM, None Restricted Connection DestinationProtocol ID Network ParityNONE, SPAC, MARK, Even Atpad Port Statistics Atpad Port Statistics ScreenNull Description Terms Second Screen Technical Support Access by Analog Modem Country Data Rate Telephone NumberSupport from 3ComCountry Telephone Number Returning Country Telephone Number Fax NumberNumerics SymbolsIndex ApadIndex-2 Sdlc URL
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S200 specifications

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