Northern UTA220/UTA220k specification

D-Channel X.25

Parameter 12: Flow Control of PAD by Local DTE

Parameter 12 specifies whether the DTE is allowed to flow control the PAD. Flow control of the PAD is the handled in conjunction with S-register 54 (DCE flow control). The type of flow control the PAD recognizes depends on the setting of S54. For example, if S54 is set for CTS flow control, the PAD is flow controlled when CTS is off, and resumes transmitting data when CTS is on. If all of the DCE flow control options are disabled (default), the PAD recognizes XON (Ctrl Q) and XOFF (Ctrl S) as the method of flow control. The DTE flow control of the PAD is possible if parameter 12 is set to 1 and the PAD is in the data transfer mode.

Table 12-18: PAD Flow Control by Local DTE

Value

Description

0Disabled DTE flow control of the PAD

1Enabled DTE flow control of the PAD *

*default

Note: The flow control off condition is canceled when the PAD leaves the data transfer mode. The flow control off condition does not exist when the PAD enters the data transfer mode.

Parameter 13: Line Feed Insertion after Carriage Return

Parameter 13 specifies if, and under what conditions, a line feed character is inserted in the data stream by the PAD after a carriage return when the PAD is in the data transfer mode. Enabled, the line feed insertion only applies to carriage returns transmitted to and / or received from the local DTE during the PAD data transfer mode. The format effecter (carriage return and line feed) of a service signal is not subject to line feed insertion after the carriage return since service signals are not transmitted in the PAD data transfer mode, but are transmitted in the PAD command mode.

12-26

UTA220/UTA220k

Image 102

Northern UTA220/UTA220k manual Parameter 12 Flow Control of PAD by Local DTE

Contents

UTA220/UTA220k Terminal Adapter User Guide Copyright Shielded Cables Industry Canada IC Requirements Load Number Canadian Emission Requirements Preface and Statement of Application Preface Contents LCD Operation 25 bis Dialer Operation Contents Reset Appendix A. Specifications DiagnosticsMaintenance Softload Return Procedures Index DTE Interface PIN Descriptions Issues Schedule ServiceTo Access For Questions Documentation Customer Response Card Business Reply Mail Chapter Introduction FeaturesOther Features Compatibility Operation Physical Description Rear Panel EIA-232 Configuration LED Description Functional Chapter Installation Receipt InspectionSite Preparation Installation Power ConnectionIsdn Connection DTE Interface Specifications DTE Connection Installation UTA220/UTA220k Switches and Straps Chapter Getting StartedCover Removal Switch and Strap Settings Signal Ground 35/EIA-232 Interface OFF Interface Card Removal V.35 EIA-232 interface Card DIP Switch Options V.35 Switch Location Central Office Switch Setup Step LCD Screen Action Display Channel Prov CHANGE? P3 Data TEI = DIS Getting Started UTA220/UTA220k Isdn Standards ChapterIsdn Basics National Isdn Basic Rate Interface Terminal AdaptersIsdn Basic Rate Interface Points Isdn Service Isdn Switches Switch Version Default Mode Custom Mode NI1 Switch Version Default Mode Other Modes TA Switch TA Switch Version TypeIsdn Addresses and Identifiers Channel Data Service Isdn Channels Channel Signaling Protocols Channel Data ProtocolsLayer One Layer Two Layer Three Chapter LCD Operation LCD MenusLCD Operation Menu Option Summary Navigation button directions Port Config R R E N T OPTIONS? Cont T R DEL OP T I on S ? O T OC O L OPTIONS? Menu Option Summary Loading Port TEST? Current Port OPTIONS? View Selecting V.25bis Operation in V.25 bis ModeChapter Bis Dialer Operation Bis Message Frames DTE Interface Pins DTR Pin OperationDCD Pin Operation Dial Command CRN Command ProceduresCommands CTS Pin Operation Connect Incoming Calls CIC Indication MessagesCall Connect Indication CNX Incoming Call Indication INC Response Messages Bis Dialer Operation UTA220/UTA220k Configuration Chapter EIA-366 Dialer OperationPin Function Interface Signal Definitions Digit Present DPR Present Next Digit PND Abandon Call and Retry ACR Example Dial Sequence AT Command Mode Chapter AT Command OperationAT Command Statement Escape Sequence + + + Command Statement Buffer Creating a Command Statement ATCommand Statement Guidelines Monitor Display Group Commands Repeating a Command aNumbered Commands Backspace KEY Command Scope Supervisor Command Mode Chapter Rate Adaption Rate AdaptionLink Flow Control and Pin Options Link Options 120 Options Rate Adaption UTA220/UTA220k Bonding on the UTA220 Option Select Disconnecting a Bonding Call Placing a Bonding Call Chapter Synchronous Operation Synchronous Mode 1 Sync Pause ModeSynchronous Mode 2 Dial Stored Number Mode Synchronous Modes 11-2 Chapter Channel Functional DescriptionPAD Establishing AN X.25 Session Atdd CommandAT@P1=P or AT@P1=D Command Initialize the PAD Establishing an X.25 Virtual Connection Escaping to PAD Command Mode Escaping to AT Command ModeDisconnecting the X.25 Virtual Connection Common Apparent Problems PAD Command SET Status Stat Issuing PAD CommandsReset Clear CLR Interrupt INT SET Read PAR? Set and Read SET?Remote Read RPAR? Remote Set and Read RSET? Profile Read/Save Prof PAD Select Network User Identification NUI FacilitiesReverse Charging R Closed User Group CUG Recognized Private Operating Agency Flow Control Parameter Negotiation 1PAD Command Set Summary Command Description Response PAD Service Signals 2PAD Service Signals Command Extension Reason Signal PAD Reset Service SignalsPad Clear Service Signals CLR INV CLR NP Saving the X.3 Parameter ConfigurationParameters and Values CLR RNA 5Default X.3 Parameters Parameter Description Default RemarksDTE 6CCITT X.3 Parameter Profiles Description Transparent Simple Parameter 1 Pad Recall Character 6CCITT X.3 Parameter ProfilesValue Description Parameter 2 Echo Parameter 3 Selection of Data Forwarding Characters Parameter 4 Selection of Idle Timer Delay Value Parameter 6 Control of PAD Service Signals Parameter 5 Ancillary Device Control Signal allows the DTE to signal the PAD without loss Parameter 7 Action of PAD on Break from DTE Parameter 8 Discard Output Parameter 9 Padding after Carriage Return Parameter 10 Line Folding Parameter 11 Binary Speed of Local DTE Parameter 12 Flow Control of PAD by Local DTE Parameter 13 Line Feed Insertion after Carriage Return Parameter 14 Padding after Line Feed Parameter 15 Editing Parameter 16 Character Delete Parameter 17 Line Delete Parameter 18 Line Display Parameter 19 Editing PAD Service Signals XXX CR LF Parameter 20 Echo Mask Parameter 21 Parity Treatment Parameter 22 Page Wait 28 Page Wait Software Sets Chapter SoftloadTA Software Architecture Software Format TA Power-Up Sequence 1PROM Error MessagesLCD Message Description Set/Display Softload Password %P1 Softload Operation Request Softload Product Version Information $Q Product Number Active Software 1D Alternate Software 1B Initiate Software Download $Y=x S59 Softload 5General Softload Error CodesCopy Active Flash $Y2=x Code Hex Description 6CPU Softload Error Codes 6AH7AH Swap to Alternate Software $T=x Typical Local Softload Session Error 13-10 Global Tests Chapter DiagnosticsCommunication Diagnostics 2B+D Loopback Port Tests Local Terminal LoopbackLocal Loopback Test Digital Loopback Test Local Loopback Test Digital Loopback Test Bilateral Loopback Test Bilateral Loopback Test Front Panel Keypad Test Diagnostic Status DisplayView Diagnostic Code View Product Information Chapter Maintenance MaintenanceFuse 15-2 Appendix a Specifications Power Requirements Supplementary ServicesDimensions Power Consumption Appendix B Factory Default Settings Null Enbloc Factory Default Settings Factory Default Settings UTA220/UTA220k Description Value AT Command SetAppendix C AT&T 5ESS DMS100 PVC IC-0 DMS100 PVC IC-1 AT Command Set DTR RTS/CTSXON/XOFF CTS always on when On-line Data Set Ready DSR DSR always on Off default One default Sync RTS Non-PVCdefault PVC Rpoa Call DLE ESC,BEL,ENQ,ACKNAK Default 1,1,0 Default 2,1,1 ENQ L22= Wait Range Interfaces Appendix D InterfacesIsdn Interface Table D-1U Interface RJ45 Pin Functions EIA-232C Function Pin Table D-2EIA-232/C/V.24 Pin Functions DB-25 34 Pin Function Table D-3V.35 Pin Functions Table D-4Ports 3 and 4 Pin Functions DLO EIA-366A RequirementsRL/CG CH/CI DTE Interface PIN Descriptions Ring Indicator Receive ClockData Terminal Ready Interfaces UTA220/UTA220k Parameter Factory Default Range Value Appendix E Network Option Values Port 3 Data TEI Appendix F Ascii and Ebcdic Characters SMM Ascii and Ebcdic Characters ACK0 Ascii and Ebcdic Characters Ascii and Ebcdic Characters Ascii and Ebcdic Characters 253 254 255 Trailing pad Appendix G Abbreviations and Acronyms CBX DAA Ebcdic Hdlc LSD Pots RMT LB Telset Abbreviations and Acronyms UTA220/UTA220k Appendix H Status and Connection Messages Status and Connection Messages UTA220/UTA220k Appendix I 128K Clear Channel Leased-Line Service Configuring D- and B-Channels Configuring the Port and Protocol AT&M2 Return Procedures Introduction Factory Repair Index DTE Page Warranty UTA220/UTA220k