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3Com S200 manual Flow Control, You can configure the ATPAD for either type of flow control

Models: S200

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Flow Control

ATPAD Ports

Flow Control

You can configure the ATPAD for either type of flow control:

•Control Signal

•XON/XOFF

If you select Control Signal, the port does not send data if the port's Pin 14 input is LOW. If the port wants to flow control the attached device, it sets its CTS output LOW.

If you configure the port for XON/XOFF, the port stops sending data if it receives the configured XOFF character. It resumes transmission when it receives an XON character. You can configure the XOFF and XON characters. If the port wants to flow control the attached device, it sends an XOFF character. Then it sends an XON character when it is ready to receive more data.

Caution!

If the port's message queue overruns because flow control is not in effect, the port discards data and this alarm is generated:

Pn - DATA DISCARDED

where: Pn - is the port identifier, and n is the port number.

Protocol Identifier You can use a Protocol Identifier to ensure that only calls from other devices using the same Protocol Identifier are accepted.

You configure a Protocol ID in the port record. The PID is inserted in the Call User Data field of all Call Request packets generated by the port. All incoming Call requests are checked for the presence of the same PID. If it is not present in the Call Request packet, the call is rejected.

If you leave the Protocol ID parameter blank, no PID is inserted in Call Requests, and there is no checking of incoming Call Request PIDs.

CUD and Facilities Call User Data (CUD) and facilities in incoming Call Request packets are ignored except for the PID. If you need to insert CUD and Facility fields in Call Request packets generated by the port, do this:

Step

Action

1Configure one of the Stored Addresses using the X.28 Call Command format.

2Insert the appropriate CUD and Facilities fields in the configured Call Command string.

3Use the ATDSn command referencing the correct Stored Address.

Configuring PAD/ATPAD Ports

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3Com S200 manual Flow Control, You can configure the ATPAD for either type of flow control

Contents

3Com Corporation PathBuilder S200 Series Switch Configuring with PAD/ATPADRestricted Rights Legend Restricted Rights Notification for U.S. Government UsersProprietary Material Notice continuedPage Contents Page Overview Configuring PAD/ATPAD PortsIntroduction Before You BeginWhat Is a PAD What is a PAD?What is an ATPAD FeaturesExample Typical ApplicationsIntroduction Figure 1. Topologies with and Without the PADConfiguration PAD Port ConfigurationPAD Port RecordThen GuidelinesIf You Specify or Set Step RecordAction ResultConnection Type ParametersConfiguring the PAD Port IntroductionWhen... continued Port ControlAuto Baud Sequence Port SpeedDevice Parity Data Bits per CharacterNumber of Stop Bits Profile NameCall Control Terminal Control PAD Prompt Entry Number Autocall Timeout secRemote PAD Parameters Number Autocall MnemonicSubaddress Maximum Number of Autocall AttemptsGroup Subaddress CUG MembershipInvitation to clear Call Accept Timeout secBilling Records Reconnection Tries Limit Reconnection TimeoutProtection Level Maximum Receive Buffer Length Calling DTE PasswordCalled DTE Address Calling DTE IdentifierNUI verification timer PAD Command LanguageNUI Facility Format Max NUI violationsAction Type for NUI violations Introduction PAD Port Configuration for AutocallingInitiating an AutoCall Mnemonic Addressing Figure 3. SDLC Mnemonic Autocall Addressing SDLC Mnemonic AddressingCharacter Delay PAD Port Configuration for AutospeedImplementing AutospeedHow It Works PAD XON/OFF Support Using X.25 Interrupt Packets1 Select Configure from the CTP Main menu To enable this CSK Complete these steps to enable the XON/XOFF CSK2 Select Software Key Table from the Configure menu 4 Perform a Node boot to implement your changesPAD Prompt Table Record Before You Begin Accessing the PAD Prompt Table RecordWhat You See in This RecordEntry Number PAD Prompt Table Record ParametersPAD Prompt Text IntroductionIntroduction What You See In This Record PAD Profile Table RecordAccessing the PAD Profile Table Record Configuration GuidelinesSelect PAD Profile Table from Step#1, PAD Recall PAD Profile Table Record ParametersIntroduction Parameters#3, Data Forwarding Character #4, Idle Timer Delay#2, Echo #5, Device Flow Control #6, Service Signals Control#10, Line Folding #7, Break Signal Operation#9, Padding After Carriage Return #13, Line Feed Insertion after CR #12, PAD Data Restraint#15, Editing #14, Padding after LF#16, Character Delete #17, Line Delete#19, Editing Type #18, Line Display#21 Parity Treatment #20, Echo Mask#100, Break Character #22, Page Wait#101, Echo Substitution Toggle Character #102, Echo Substitution Character#104, XOFF Character #105, Control Signal EIA-232-D Data Restraint#103, XON Character #108, Disconnect Character #107, Idle Disconnect Timer#106, Network Parity #109, Form Feed Padding #110, Esc Forwarding Delay Handling#113, Hewlett-Packard Flow Control #111, Echo Control#112, Dynamic Data Forwarding #115, Data Forwarding Criteria #114, PAD Mode#116, Short Timer Duration #119, DCD to Data Timer Duration #117, EIA Signalling Action#118, Message Assembly PAD Profile Table Copying PAD Profile Tables into a ConfigurationSize Profile TableDefault Parameter Values Stored In MemoryParameter Name TestParameter Values Stored in Memory Parameter Values Stored In Memory continuedParameter Values Stored in Memory continued 90 and Parameter 6 service signals control is set toPAD Bulletin MessageRemote PAD Parameter Table Record Before You Begin Configuration Guidelines Accessing the Remote PADWhat You See In Parameter Table RecordIntroduction Remote PAD Parameter Table Record ParametersParameters Entry Number#1 Parameter Number Example #1 Parameter Number continued#1 Parameter Value Description of Terms - First Screen Detailed PAD Port StatisticsFunction Data Summary IN/OUT Tells You Description of Terms - Second ScreenScreen Term Figure 11. Example of Detailed PAD Port Statistics, Third Screen how to configure them ATPAD PortsIntroduction ATPAD PortsCriteria Descriptions ATPAD OperationATPAD Data Forwarding Criteria Flow Control You can configure the ATPAD for either type of flow controlFigure 12. ATPAD Application Environment Network Parity Application Response Delay DTR TimeoutGuidelines ConfigurationUse these guidelines when you enter ATPAD commands ATPAD Ports Figure 13. Configure ATPAD Port MenuConfiguring PAD/ATPAD Ports Clock Speed Port TypeParameters Connection TypeParity Data BitsStop Bits Escape CharacterLine Feed Character Carriage Return CharacterBack Space Character Data Forwarding CharacterData Forwarding Timer Escape Sequence TimerXON Character Flow ControlPacket Size Answer ModeEcho Stored AddressesRestricted Connection Destination Result CodesPort Address Billing RecordsRange Protocol IDNetwork Parity Function ATPAD Port StatisticsDescription of Terms - First Screen Characters/secFigure 15. ATPAD Port Statistics - Screen Screen TermTells You... continued Tells You Description of Terms - Second ScreenScreen Term Technical Support ServicesOnline Technical World Wide Web3ComFacts Automated Fax Service Support from Your Network Supplier Access by Analog ModemAccess by Digital Modem 1 408 6543Com Support fromAsia Pacific Rim EuropeReturning Numerics SymbolsIndex