IBM 3708 Description Download

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Summary of Contents for 3708

Page 1: ......

Page 2: ...Description 3708 Network Conversion Unit GA27 3768 01...

Page 3: ...202 634 1940 Second Edition February 1988 Consumer Assistance and Small Business Division Room 254 1919 M St NW Washington DC 20554 Tele 202 632 7000 This edition obsoletes GA27 3768 0 Changes are mad...

Page 4: ...contains eight chapters and six appendixes Chapter 1 Introduction introduces the 3708 and describes its components and functions Chapter 2 3708 Operation describes areas of operation including LED st...

Page 5: ...prepare the 3708 for relocation IBM 3708 Network Conversion Unit Planning and Installation GA27 3766 describes planning and installation information IBM 3708 Network Conversion Unit Problem Determinat...

Page 6: ...gler ADM 24E Lear Siegler ADM 3A Dumb Terminal Lear Siegler ADM 31TM Northern Telecom Displayphone ROLM Cedar ROLM Cypress ROLM Juniper Teletype 5410 Async Display Terminal Teletype 5420 TeleVideo 910...

Page 7: ...vi IBM 3708 Description...

Page 8: ...ns field Descriptions of the enhanced terminal support including IBM 3270 Models 2 3 4 and 5 emulation Customized UDT names Customized terminal logon initialization sequences A description of a new ho...

Page 9: ...viii IBM 3708 Description...

Page 10: ...g Alternately Base and Cartridge Lights Both Off Base and Cartridge Lights Blinking Together One or Both of the Lights on Solid Restart on Error Loop Configurations IBM Supplied Configuration Customer...

Page 11: ...2 24 Asynchronous Line Operation HDX Communication Facility HDX Control Unit 2 25 Asynchronous Line Operation FDX Communication Facility PRTS HDX Control Unit 2 26 Asynchronous Line Operation FDX Comm...

Page 12: ...ing LU type I SCS Pacing LU type 2 and LU type 3 DSC Pacing for LU type 1 NTO Sessions SNA Responses LU LU Session Error Reporting SNA Sense Codes Session Processing States Bracket States Between Brac...

Page 13: ...Field SF Set Buffer Address SBA Insert Cursor IC Program Tab PT Repeat to Address RA Erase Unprotected to Address EUA Processing the 3270 Data Stream 3270 Data Stream LU type 3 Commands Print Line For...

Page 14: ...ine How the 3708 Updates the Status Line Displays With an Addressable Status Line Displays Without an Addressable Status Line Status Line Format Ready Status Device Emulation Session Indicator Session...

Page 15: ...ated Local Copy Host Interference with Operator Copy Host Initiated Local Copy Local Copy Printed Format Local Copy While in Control Terminal Session Displays with Printers 3708 Configuration Host Def...

Page 16: ...t Operations in Pass Through Mode Abnormal Conditions Terminating Pass Through Mode Configuration Notes Dial Out Chapter 7 Nonstandard Operations Chapter 8 Network Management and Problem Determination...

Page 17: ...ching to the 3708 Restrictions Considerations Appendix B 3708 Security Port Passwords Control Terminal Password Control Terminal Access Multiple Control Terminal Sessions Transmission of UNBIND OF and...

Page 18: ...umber of System Buffers Receive Queues Device Buffers Appendix F IBM Supplied Translate Tables Converting Between ASCII and EBCDIC Standard Translate Tables Default Translate Table Alternate Translate...

Page 19: ...xviii IBM 3708 Description...

Page 20: ...X Communication Facility HDX Control Unit 2 25 2 17 Asynchronous Line Operation FDX Communication Facility PRTS HDX Control Unit 2 26 2 18 Asynchronous Line Operation FDX Communication Facility PRTS E...

Page 21: ...XX IBM 3708 Description...

Page 22: ...en an ASCII end user device and line oriented applications running on an SNA host In this mode the 3708 surrounds the data stream from an ASCII device with SNA headers Devices that normally communicat...

Page 23: ...s to NetView or to the Network Problem Determination Application NPDA and response time statistics to NetView or to the Network Logical Data Manager NLDM for displays that are connected for protocol c...

Page 24: ...anslate table can be defined using the control terminal It allows the SNA host to dial out to devices in protocol enveloping mode It allows a display to dial out to an ASCII host in ASCII pass through...

Page 25: ...lines ASCII devices may be directly attached or may be remotely attached over switched or nonswitched lines Line speeds of up to 19 2 Kbps can be used Several ASCII devices can communicate with an SN...

Page 26: ...Host SNA Host SNA Host 3708 3708 Figure 1 3 Two Kinds of Dual SNA Host Connections ASCII Devices ASCII Devices For more information about attaching to an SNA host see SNA Hosts Chapter 1 Introduction...

Page 27: ...ble programmable read only memory EEPROM The 8K of EEPROM is used to store the following Vital product data Extended Error Information Field EEIF Error log Alert log Patch data microcode temporary fix...

Page 28: ...formed from the control terminal Protocol Conversion Display Support In protocol conversion mode the 3708 provides all the functions in IBM 3274 Configuration Support A It provides additional function...

Page 29: ...ping one of the following Any uppercase character or symbol into the numeric field A blank into the first position in the numeric field While the blank occupies the first position in the field the use...

Page 30: ...IBM 3287 Printer Modell or 2 to the SNA host The ASCII printer or keyboard printer can be configured to operate in three ways System mode The host sends print data to the printer which is either an L...

Page 31: ...n auxiliary port on a display that supports remote access to its auxiliary port can be defined as a second LU on the 3708 port to which the display is connected The printer can then be used in system...

Page 32: ...acter configured in the 3708 When it detects a framing error the 3708 always replaces the framing error with the Parity Error Substitution character It can use up to five different turnaround characte...

Page 33: ...d n a n a emulation IBM 3287 Printer Models 1 and 2 emulation Required n a n a Four color support 3279 2A and 3179 emulation Optional n a n a Highlighting support Optional n a n a Light pen emulation...

Page 34: ...e 3708 logon screens Optional Optional Optional Control Terminal Functions Any supported display that can operate in protocol conversion mode can be used as the control terminal Control terminal acces...

Page 35: ...se that UDT as a control terminal Configure your system for all output only devices or no control terminal Since the default configuration can always be invoked without the loss of any user defined co...

Page 36: ...System Data Link or Direct Attach IBM System 36 Communications Attachment using the 3274 Remote Attach Support IBM System 38 Communications Attachment using the 3274 Remote Attach Support For network...

Page 37: ...ice and an ASCII host are communicating through a 3708 the line speeds of the line to the device and the line to the host should be such that the transmission over the slower of the two lines is less...

Page 38: ...o 8535 IBM 3161 ASCII Display Station IBM 3161 with Enhanced 3708 Attachment Feature No 8371 IBM 3162 ASCII Display Station IBM 3162 with 3708 Support Functions Feature No 8232 IBM 3163 ASCII Display...

Page 39: ...for the IBM 3151 IBM 3151 with Connectivity Feature Cartridge IBM 3151 with Expansion Feature Cartridge The Connectivity Feature Cartridge is available only for Models 310 and 410 and is supported by...

Page 40: ...00 3708 Emulation Cartridge is supported by Terminal ID 2A for the 3163 and Terminal ID 2B for the 3164 on the 3708 s Terminal Selection C2 screen It provides the following additional enhancements The...

Page 41: ...1 20 IBM 3708 Description...

Page 42: ...veloping Mode and Chapter 6 ASCII Pass Through Mode for a description of each mode LED Sequences and Steady States The 3708 has three light emitting diode LED indicators that are used to show the oper...

Page 43: ...as been activated See the description that follows for more information about the LED steady states Extended Diagnostic Sequence This sequence occurs if the 3708 is powered on while the test normal sw...

Page 44: ...ost has not activated the 3708 The 3708 has not received a valid SDLC SNRM command from the host to initialize communications If LEDs continue to blink alternately the 3708 SNA host ports have been co...

Page 45: ...ght on solid state can be caused by certain microcode errors when the 3708 is set for STOP ON ERROR If set to RESTART ON ERROR these microcode errors would cause the 3708 to reinitialize itself as if...

Page 46: ...on may never need to be used again The only time it may be needed is to allow IBM service personnel to perform remote diagnostic service refer to IBM 3708 Network Conversion Unit Planning and Installa...

Page 47: ...er the necessary changes and press the PF6 key sequence to copy the updated configuration back to the customer configuration Permanently Reinstating the IBM Supplied Configuration The user can copy th...

Page 48: ...egardless of whether the sessions being established are with SNA hosts ASCII hosts or the 3708 control terminal the appropriate 3708 logon procedures must be provided to the terminal users by the netw...

Page 49: ...15 TT 5420 16 HP 2621B 17 DG D210 lS ROLM DISPLAY 19 BEEHIVE ATL07S 20 UDnH 21 UDTe2 22 UDTe3 23 UDTe4 24 UDT05 25 UDT06 For trademark acknowledgements see 370S publications To disconnect from the 37...

Page 50: ...tivate its interface to the modem and will not answer a call from a user Some modems may be set so that they will answer a call even if the interface to the 3708 is not active Also you cannot access t...

Page 51: ...and Turnaround Characters are used To change or delete these options configure the port for dynamic operation or first configure for dynamic operation change or delete the options then reconfigure th...

Page 52: ...screen The host may also be configured to automatically BIND the downstream device The BIND flows from the host after the 3708 transmits the NOTIFY power on Communication before the BIND is to the hos...

Page 53: ...Deactivation of PU DACTPU command received Ifthe device is a display the 3708 sends the message HOST UNAVAILABLE RETRY LATER before disconnecting the device Conditional Disconnection If the SNA host s...

Page 54: ...ost disconnect sequence When this sequence is used the 3708 does not disconnect from either the ASCII host or the terminal The terminal user is presented with the 3708 host selection screen C3 and the...

Page 55: ...pted The 3708 should respond to XOFF after 8 or fewer characters have been transmitted for all device types Note Most personal computers printers and some keyboard displays support pacing See IBM 3708...

Page 56: ...0 full or 75 full depends on how fast the downstream device can stop transmitting after receiving an XOFF and how large the receive queue is Only the XOFF threshold can be selected XON is sent when th...

Page 57: ...NM Host The logging of 3708 alerts is independent of whether or not there is an SNA host and whether or not the host link is active Usually normal 3708 operations continue after an entry is made in th...

Page 58: ...ol enveloping only Port control timers Various timers are used to determine whether a port s interface is ready for data transfer For example on a nonswitched line the 3708 waits 3 seconds for DSR to...

Page 59: ...r restarted The RAM copies are lost at each restart At power on or restart a special error log entry is created as follows using the last relative time clock value that was saved in EEPROM 00 00 FE FE...

Page 60: ...eady 3708 input For nonswitched lines the 3708 activates Data Terminal Ready DTR and performs one of the following 1 For SDLC connections and LINE TYPE L configured in the 3708 If DSR is not presented...

Page 61: ...the baud rate clock for received data RxD Pin 18 TC Test Control This pin is not used by the 3708 Pin 20 DTR Data Terminal Ready 3708 output This pin is used by the 3708 to indicate that a connection...

Page 62: ...TxD Transmit Data 3708 output Pin 16 RxD Receive Data 3708 input Pin 19 RxD Receive Data 3708 input Interface Leads during Port Activation The following figures show the states of the interface leads...

Page 63: ...dem and OSR to be presented 3708 does not limit the time that it waits for OSR to be presented 4 OSR comes active Connection is established Figure 2 11 Switched Line Activation not CDSTL Switched Line...

Page 64: ...DSR I 3 RTS I 4 eTS 6 7 TxD _______ I xY a L 1_ _ __ rSNRM RxD _________ X 93 1 3708 is activated DTR is activated 2 3708 waits up to three seconds for DSR to be presented if 3708 is configured for LI...

Page 65: ...figured for LINE TYPE OJ 3 3706 receives SNRM from the host 4 3706 activates RTS and waits up to nine seconds for eTS S Modem presents eTS 6 3706 transmits two msec of flags followed by UA Two msec gu...

Page 66: ...y remote device before remote device loses DCD 6 3708 drops RTS 7 Modem drops CTS 8 3708 begins receiving data DCD has been presented by modem 9 3708 has data to transmit to remote device waits for li...

Page 67: ...CTS is monitored and must be presented within 40 seconds 3 Modem presents CTS 4 3708 transmits data 5 3708 begins receiving data 6 3708 has data to transmit Data is held pending line turnaround 7 Rec...

Page 68: ...igured waits until receive operation is complete before transmitting If characters have been received the 3708 waits for receive to complete only if HDX control unit is configured Note Echoplex forces...

Page 69: ...o 40 seconds for CTS 3 CTS is presented to 3708 4 3708 begins transmitting data 5 3708 receives data from remote device S 3708 finishes transmitting data 7 3708 has more data to transmit 8 71 8 3708 t...

Page 70: ...of SNA commands and access method macros VTAM ACF VTAM General Information GC27 0608 ACF VTAM Programming SC27 0449 ACF VTAM Reference Summary SX27 0027 ACF VTAM Operation SC27 0612 ACF VTAM Messages...

Page 71: ...1 Single or multiple frames may be sent The last frame or a single frame transmitted by the 3708 in response to a command received with the P bit set to 1 must have the F Final bit set to 1 When the...

Page 72: ...trol field formats are Bits 012 RR Nr RNR Nr 3 P F P F 4 o o 5 o I 6 o o 7 1 I Where Nr the sequence number of the next I frame that the 3708 expects to receive The 3708 transmits RNR when it cannot a...

Page 73: ...n SNRM or DISC command The Test command is used to initiate one round trip transmission of test data both in NRM and NDM The 3708 returns the Test response The Disconnect Mode DM response is sent by t...

Page 74: ...1 frame that caused the sequence error and rejects all following 1 frames until an 1 frame is received that contains the correct NS value The sequence error condition is then reset The 3708 transmits...

Page 75: ...e Out value While it is in an information transfer state the 3708 checks if any valid frames are received Frames with errors such as FCS errors are not considered valid frames The link is declared ina...

Page 76: ...mary fails ACTPU and ACTLU commands from the secondary host receive positive responses but the device is treated as if it is turned off If the primary host fails and the SDLC Time Out value is exceede...

Page 77: ...in detail under SNA Commands on page 3 15 SSCP PU Session Before establishing the SSCP PU access method 3708 Physical Unit session the physical transmission connection to the host must be established...

Page 78: ...ating in protocol conversion mode The SNA BIND command byte 14 is used to differentiate between type 1 2 or 3 sessions If a type I BIND is received LU type I SCS and LU type I NTO are differentiated b...

Page 79: ...ls the SSCP that although the LU in the 3708 has been activated the device attached to that LU is not available for use powered oft The 3708 SLU considers all devices powered ofT until a host selectio...

Page 80: ...Parity Port Password C1 Password Terminal Type C2 Terminal Type Host Selection C3 Host Selection NOTIFY SSCP SLU 5 RSP NOTIFY 6 Enter Logon C4 Good Morning Message Good Morning Message 6 RSP Logon SSC...

Page 81: ...n Terminating an LU LU Session LU LU sessions can be terminated in the following ways The PLU can terminate an LU LU session by requesting that the SSCP close the session The SSCP then sends an UNBIND...

Page 82: ...keyboard display with printer It is associated at configuration time either with host A or host B but not both All three of these LUs may be activated at the same time however only two one display an...

Page 83: ...the 3708 configuration are listed in the following table The default LU device numbers are provided as if a display with printer were configured for each port Port A Host BHost Printer 1 00 00 10 2 01...

Page 84: ...ination address OAF the origin address OAF and a sequence number Request Response Header RH This header describes the type of message being transmitted and contains indicators that control SNA protoco...

Page 85: ...Network Control NC Data Flow Control DFC Function Management Data FMD Expedited Request ACTPU DACTPU ACTLU DACTLU BIND UNBIND CLEAR SDT Not Supported SIGNAL SHUTDOWN Not Supported The 3708 supports t...

Page 86: ...N REQMS FMD N RECFMS FMD N NMVT FMD N NOTIFY FMD N TERM SELF FMD N Activate Physical Unit ACTPU The ACTPU command is sent by the access method to establish the SSCP PU session with the 3708 The SSCP...

Page 87: ...response indicates power off resource unavailable status A NOTIFY command is sent to indicate that the downstream device is available for use Downstream devices are available for use when the devices...

Page 88: ...downstream device is powered off and it tests whether the access method supports the NOTIFY command A negative response to the NOTIFY command indicates that the host access method does not support NOT...

Page 89: ...a positive response to establish the LU LU session When the session cannot be established the 3708 returns a negative response with sense data that describes the reason the session was rejected See S...

Page 90: ...can send the next RU x x Chaining Responses 01 PLU can request exception response 10 PLU can request definite responses 11 PLU can request definite or exception responses 00 Reserved 0 Compression Ind...

Page 91: ...ution o Contention resolved in favor of the 3708 8 X OO 00000000 Inbound pacing not supported by the 3708 9 X XX OOxxxxxx PLV to 3708 pacing value defining the number of RVs that can be received by 37...

Page 92: ...umns X 50 80 X 84 132 24 0 Reserved xxxxxxx Session Screen Size b 0000000 Base default 24x80 b 0000010 Base Model 2 24x80 b 1111110 Extended default size Bytes 20 and 21 determine default screen size...

Page 93: ...OO C b OO 4 C b l C b l C b l C b l 5 NC NC NC NC 6 C b l C b l C b l C b l 7 C b l C b l C b l NC 6 0 NC NC NC NC 1 C b l C b l C b l C b l 2 C b O C b O C b O C b O 3 C b O C b O C b O C b O 4 C b...

Page 94: ...31 00110001 I 01 00000001 2 03 00000011 3 03 00000011 4 Bl 10110001 5 BO 10110000 6 30 00110000 7 80 10000000 8 00 00000000 9 01 00000001 10 85 10000101 11 85 10000101 12 13 00 00000000 14 01 0000000...

Page 95: ...MPROT X 308e X RUSIZES X 8585 X PSERVIC X e2eeeeeeeee01850185e7Fee Note PSERVIC values change depending on the model type being emulated LU Type 3 The suggested settings for LU type 3 DSC are the same...

Page 96: ...10 or 11 00 Reserved 0 No compression 0 o Secondary will not send end bracket Can also be set to 1 6 X 30 Common Protocols 0 Reserved 0 No FM headers 1 Bracket reset state is BETB 1 Rule 1 cond brkt...

Page 97: ...nnect the downstream device Termination of LU LU Session When the 3708 receives this command it terminates the LU LU session between a host program and a 3708 SLU The LU LU session is terminated when...

Page 98: ...connected The UNBIND OF ensures that the session is terminated by the network and prevents another user from dialing in to the same 3708 port and gaining access to a previous user s application Sessio...

Page 99: ...he chain that have been received If the PLU returns a negative response for an element of a chain the entire chain is transmitted before the PLU response is examined Cancel is not sent The PLU should...

Page 100: ...LU is in send state but has not started transmitting If the SLU is already in receive state or BETB the signal is positively responded to but no SLU action is taken The 3708 sends the Signal command X...

Page 101: ...application The 3708 SLU sends the LUSTAT command to notify the PLU that a change in the operational status of a device has occurred The LUSTAT contains a 4 byte status code to describe the device st...

Page 102: ...3708 resets the error log area referred to by the REQMS after the RECFMS is transmitted Otherwise the error log area is not reset The PLU sends the Shutdown command Receipt of this command directs th...

Page 103: ...age 3 46 A bracket is initiated when the Begin Bracket indicator is accepted by the primary or secondary LU The bracket is usually ended when the End Bracket indicator is received by the secondary LU...

Page 104: ...LU type I NTO mode Bracket protocol establishes the following restrictions on beginning and ending brackets BB and EB cannot be sent with response RUs The EB cannot be sent with the BID or RTR comman...

Page 105: ...with chaining indicators in an incorrect sequence for example FIC MIC FIC a negative response with sense data indicating a chaining error sense code X 2002 is returned to the host program The 3708 pu...

Page 106: ...nge Direction indicator on the last request sent When in half duplex contention at session activation one half session is designated the contention winner and the other the contention loser Initially...

Page 107: ...processing state E Command establishes this session R Required state for this command to be valid T Command terminates this session X Command sets the processing state to the indicated status Table 3...

Page 108: ...NA SSCP PV SSCP LV LV LV Command Session Session Session DTR DTR m m Sent Active Active Active On Off On Off LUSTAT R Signal R R Cancel R R R Ready R R R to REC Shutdown R R R Complete FM Data R R R R...

Page 109: ...he data to the printer If the host can transmit new data faster than the 3708 can transmit it to the printer the 3708 is forced to store all of the unprocessed data in its internal system buffer area...

Page 110: ...esponse and exception response protocols A no response request is treated as an exception response request LU LU Session Error Reporting When the host program or the 3708 SLU is the receiving LU error...

Page 111: ...st other than BIND is sent to an SLU that has already accepted a BIND and the OAF is not X OO or the OAF in the accepted BIND X OF Invalid Address Combination A request was addressed to the PU OAF X O...

Page 112: ...AV command For LV type 3 any Read RM or RMA command Unsupported FM Data SSCP SLV X OS Parameter Error Invalid address following SBA RA or EVA order SBA RA or EVA order without parameters or SCS parame...

Page 113: ...or BID with begin bracket if the display has won contention and started a bracket Returned in protocol conversion mode when a BID or begin bracket was received and INB state already exists This may be...

Page 114: ...xx is the sequence number of the current RU 1 and yy is the sequence number of the last RU 2 0010 Read or Write to EEPROM failure OOAI Configuration incomplete UDT incomplete Translate incomplete Pat...

Page 115: ...When the BID or BB is accepted from the PLU or BB is sent by the SLU BETB ends If the host program cancels the chain containing the begin bracket or if the SLU sends negative response for the chain co...

Page 116: ...FM data RU greater than 32 767 bytes If a PLU maximum send size is not specified in the BIND no length check is made on an FM data RU transmitted by the PLU to the 3708 Note The recommended and most...

Page 117: ...an contain a maximum of 256 bytes of RU data plus 6 bytes of transmission header TH and 3 bytes of request response header RH A PIU with an MIS or LIS element can contain a maximum of 259 bytes of RU...

Page 118: ...Pressing the SYS REQ key sequence interrupts communication taking place during the LV LV session without waiting for completion of outbound chains As long as the LV LV session remains bound depressin...

Page 119: ...ejected by the 3708 with a sense code of X 1007 SSCP Communication to Displays When a user has put the display into SSCP mode by pressing the SYS REQ key sequence all data entered is sent to the host...

Page 120: ...initial cursor address is reset to the first position of the screen Pressing program attention keys other than ENTER or CLEAR causes the Input Inhibited Minus Function X F message to be displayed in t...

Page 121: ...Print key In this mode the printer cannot be used by a type 1 or 3 SLU An ACTLU request for the SLU associated with the printer is rejected with sense code X 0801 Shared Mode Both the SLU type 2 and...

Page 122: ...re either ASCII displays or ASCII printers The 3708 receives data from the host in 3270 data stream format LU type 1 SNA character stream SCS LU type 2 and LU type 3 Data Stream Compatibility DSC mode...

Page 123: ...DEVICE BUFFER Device Control Traffic SDLC Link Level Headers Trailers added SNA Level Headers added 1 Translation ASCII to EBCDIC Terminal Data t such as Highlighting cursor control WRITE RECEIVE QUEU...

Page 124: ...4 19 Flow of Data from the Terminal As data is received from the terminal it is placed in the receive queue the size of which is configurable in the 3708 From the receive queue the data is processed...

Page 125: ...it coded address follows When the flag bits are 00 the next 14 bits are a buffer address in binary form The 14 bits consist of the remainder of the current byte 6 bits and 8 bits of the next byte No a...

Page 126: ...or EWA command followed by the WCC followed by any orders or data see Orders and Attributes on page 4 10 for information about orders If any write command except EAU is sent with no WCC or data it is...

Page 127: ...s for a Write command If the data does not contain a WCC byte the Erase Write command does not cause the buffer to be erased Erase Write Alternate Command If the 3708 is configured for large screen em...

Page 128: ...ed the command from the host This would be done when the terminal operator presses the keys to perform a function that requires a host response such as ENTER or a PF key The 3708 transfers all data in...

Page 129: ...d Modified PF23 4C Full Read Modified PF24 7E Select light pen Light Pen Space Null PAOI 6C Short Read PA02 6E Short Read PA03 6B Short Read CLEAR 6D Short Read Read Modified Command The Read Modified...

Page 130: ...if applicable The search for modified fields begins at buffer location 0 and continues until the last buffer location has been checked The data stream is terminated as follows When the last modified...

Page 131: ...data in each field that has the MDT bit set to 1 Short read response If the CLEAR key or a PA key has been pressed a short read operation is performed The data stream of a short read contains only th...

Page 132: ...attribute even when the byte was intended as an order or a data character During execution of a Read Buffer command the 3708 automatically inserts SF order codes in the read data stream immediately b...

Page 133: ...Repeat to Address RA order writes a specified character in all buffer locations from the current buffer address up to the stop address specified in the order The character is not placed at the locatio...

Page 134: ...a sequence to set the terminal in the alternate screen size specified by the BIND 4 The host data is analyzed for orders and data and from these the device buffer is updated to represent the display...

Page 135: ...ype being used supports highlighting the 3708 sends highlighting ON OFF sequences to cause characters to be correctly intensified based on the field attributes sent in the host data stream If the term...

Page 136: ...3270 Data Stream LU type 2 on page 4 3 In addition to all the buffer control orders that are used for display buffer formatting there are four printer orders that can be included in the LU type 3 dat...

Page 137: ...F character X OC to the printer If a form feed delay is specified for the port that number of ASCII DEL characters X 7F are sent After printing the last printable character on a line determined by the...

Page 138: ...he current column to the platen width A newline function is performed by the 3708 when a Begin Bracket is received for the printer session Note This newline can be suppressed by configuring the 3708 o...

Page 139: ...e next line If the character is a CR it is ignored For example the character A occurs at MPP followed by a CR and the character B The character A prints in the last position of the current line The ch...

Page 140: ...Name BS X 16 Back Space BEL X 2F Bell Function CR X OD Carriage Return ENP X 14 Enable Presentation FF X OC Form Feed GE X 08 Graphic Escape HT X 05 Horizontal Tab INP X 24 Inhibit Presentation IRS X...

Page 141: ...on ENP is a format control that is used to enable the printing of keyboard input data This command performs no function on an LU type 1 device It is accepted by the 3708 without an error response and...

Page 142: ...printout format Interrecord Separator IRS Line Feed LF New Line NL The Interrecord Separator IRS is a separator character that causes a newline function The Line Feed LF is a format control that move...

Page 143: ...ample shows the sequence of the SHF control SHF cnt MPP LM RM TI T2 Tn MPP Defines a line length less than or equal to the maximum print position The default value for MPP is the platen width that has...

Page 144: ...cifies the line value of the first line on a page The TM also serves as the first vertical tab stop Valid TM values are less than or equal to the MPL The TM default value is 1 BM Specifies the line va...

Page 145: ...code as X 40 with no other changes in format Configuration Options Protocol Conversion Device Class The following configuration option definitions apply to protocol conversion mode For configuration i...

Page 146: ...m BIND accepted Keyboard Only LU type 1 NjA NjA Printer BIND accepted NTO Printer NjA Either LU type 3 Either LU type 3 DSC or LU DSC or LU type 1 SCS type 1 SCS BINDs accepted BINDs accepted Keyboard...

Page 147: ...eceive operations Most IBM hosts use EBCDIC Extended Binary Coded Decimal Interchange Code and most asynchronous devices use ASCII American National Standard for Information Interchange The 3708 provi...

Page 148: ...255 Printer Authorization Matrix Options The following options are available Perform Form Feed After Local Copy If N is configured for Form Feed After Local Copy the 3708 does not generate an FF betwe...

Page 149: ...ype 3 DSC When this option is set to Y the 3708 performs a newline after each Begin Bracket during a LU_3 printout If it is set to N the 3708 suppresses the newline after each Begin Bracket The defaul...

Page 150: ...for the IBM 3270 Models 2 3 4 and 5 on page 4 33 for more information There is a fixed relationship between each location in the device buffer and each character position on the display screen Buffer...

Page 151: ...cter position to the first Some field oriented operations are terminated early if the field wraps the screen This effect is noted in the descriptions of the specific operations Display fields simplify...

Page 152: ...ribute characters are not protected against operation of the CLEAR key function Pressing CLEAR erases all locations in the device buffer Bit positions in the character are significant to the 3708 The...

Page 153: ...ector light pen detectable 11 Nondisplay nonprint nondetectable 6 Reserved 7 Modified Data Tag MDT identifies modified fields during Read Modified command operations o Field has not been modified I Fi...

Page 154: ...s preserved the operator can enter data only into an unprotected field Table 4 7 Protected and Unprotected Fields Attribute Bits 3274 3708 Attribute 2 3 4 5 Color Color Unprotected 0 X 0 X green color...

Page 155: ...default screen sizes Specifying Sizes With the BIND The BIND must specify a screen size 24 x 80 32 x 80 43 x 80 or 27 x 132 If a size is not specified then 24 x 80 is assumed When the BIND is receive...

Page 156: ...of ports set for medium receive queue PI The number of ports set for large receive queues P4 The number of ports operating as device class 4 Pis The number of ports enabled for model 3 4 or S emulatio...

Page 157: ...device to Inform the operator of the status of host and printer sessions Notify the operator of error conditions that prohibit data entry keyboard lock conditions Remind the operator of the activation...

Page 158: ...atus line display on the last line of the screen size supported has been toggled on the 3708 sends the following 1 STOP PRINTER sequence if MLU and last data was sent to the printer 2 SET CURSOR ADDRE...

Page 159: ...her the status line information or the normal line of data displayed by the application When the status line is displayed the user can also view the application s last line of data by moving the curso...

Page 160: ...e 3708 blanks out characters from column 81 to 132 The folloWing is a description of the fields and codes in the status line 4 B Meaning The 3708 is running and operating normally Action None Meaning...

Page 161: ...n Press the Reset key sequence defined for the terminal XPRTNW Meaning Printer Not Working The printer assigned to the terminal is not active and no other printers in the class are available The 3708...

Page 162: ...ition of the field When a blank occupies this position enter any character into the field Meaning Wrong Number You entered an unacceptable number This occurs when you use the IDENT function to assign...

Page 163: ...isplays this message when you initiate a host data transfer while the 3708 is in slowdown mode This condition occurs when the 3708 runs low on buffer space because of overloading Action Press the Rese...

Page 164: ...on None To use a different printer or class use the IDENT key sequence to redefine the printer access Meaning Printer Printing The printer identified by nn is currently printing the information Action...

Page 165: ...The data stream ended before the 3708 received 1005 all of the required bytes of an SBA RA or BAV command PC 411 The LV type 1 RV received was longer than in 1002 the BIND specification PC 413 The 370...

Page 166: ...hange the appearance of the cursor See the device manual for instructions The 3708 does not control the cursor appearance Successful keyboard entry of a character causes the cursor to advance to the n...

Page 167: ...more description of the keyboard map see The Terminal Table Format on page 4 54 To avoid confusion this document refers to 3270 and non 3270 functions to identify keyboard activity that would be repr...

Page 168: ...line only the remainder of the current line is erased The cursor does not move This function cannot be used when operating as the 3708 control terminal Using this function when the cursor is located i...

Page 169: ...ins a null character If the input field occupies more than one row subsequent rows are not affected This function cannot be used when operating as the 3708 control terminal Using this function when th...

Page 170: ...Using a PF key or PA key function while SSCP is displayed on the status line locks the keyboard the function not supported message X F is displayed on the status line To unlock the keyboard press the...

Page 171: ...ne To unlock the keyboard press the Reset Key sequence defined for your terminal and reposition the cursor This function cannot be used when operating as the 3708 control terminal Print The Print func...

Page 172: ...e several characters for processing You can continue to enter key sequences data or AID characters while a previous sequence is being processed For example if you wanted to page forward five times in...

Page 173: ...to transmit any defined initialization sequence to the terminal This function is most often used to ensure that the terminal is in the proper mode for operation with the 3708 Resume Display Resume Pr...

Page 174: ...yboard mapping for a supported terminal or define an entirely new terminal type A user defined table UDT is saved in the nonvolatile storage of the 3708 base unit Standard and Enhanced Terminal Tables...

Page 175: ...decimal format which you should use when creating or modifying user defined terminal tables Table 4 9 General Description Section of a Terminal Table Hex Address Description 00 TerminalID 01 Flags 02...

Page 176: ...nt for SET COLOR 1 sequence E3 E7 SET COLOR 1 sequence E8 Byte count for SET COLOR 2 sequence E9 ED SET COLOR 2 sequence EE Byte count for SET COLOR 3 sequence EF F3 SET COLOR 3 sequence F4 Byte count...

Page 177: ...r Set 32 x 80 mode sequence 13D 14B Set 32 x 80 mode sequence 14C Byte count for Set 43 x 80 mode sequence 14D 15B Set 43 x 80 mode sequence 15C Byte count for Set 27 x 132 mode sequence 15D 16B Set 2...

Page 178: ...d Installation for more details Table 4 13 Terminal IDs Internal ID 01 02 03 04 05 06 07 OS 09 OA OB OC OD OE OF 10 11 12 13 IE IF 20 21 22 23 24 25 26 Terminal Type IBM 3101 Display Terminal IBM 3161...

Page 179: ...last character position on the screen If this bit is set to 0 the 3708 sends characters for display in the last character position on the screen Bit 4 Extended Key Sequences If this bit is set to I th...

Page 180: ...0 when enhanced tables are in use the control terminal will not accept the change The following table shows the settings of the second through fifth bytes of the terminal tables for the supported term...

Page 181: ...No 03 X 3P Null ESPRIT I ESPRIT II Hazeltine No No Yes No No 0 No 03 Null X 7E 1500 Hewlett No No No No No 0 No 00 Null Null Packard 2621 B Lear Siegler No No No No No 0 No 02 Null Null ADM 3A Northe...

Page 182: ...umber in ASCII characters 4 Any ASCII character 5 Column number in ASCII characters 6 Any ASCII character Example ESC Ib II 22 H In hex IB5B31313B323248 I The numbers are ASCII representations of the...

Page 183: ...8 to the terminal may be interrupted Alternate Control Sequence Character If the terminal uses a control sequence that introduces characters other than or in addition to an ASCII ESC X lB this I byte...

Page 184: ...7F Function CURSORSEL CURSOR UP CURSOR DOWN CURSOR LEFT CURSOR RIGHT TAB BACK TAB NEWLINE HOME TYPEAHEAD NULL BLANK FIELD MARK DUP ERASEEOF ERASE INPUT INSERT DELETE ECHO CLICK KEY PRINT IDENT STATUS...

Page 185: ...inal table byte 2 If the terminal generates a trailing character for example a carriage return in the ESC sequence add X SO to the function number and delete the carriage return from the key sequence...

Page 186: ...es subsequent characters received by the terminal to be highlighted Causes subsequent characters received by the terminal not to be highlighted Causes the terminal alarm a beep to sound Causes subsequ...

Page 187: ...any terminal initialization sequence that may be useful If the status line flag in the terminal table is 1 but the count field of the START STATUS sequence is 0 the 3708 uses normal SET CURSOR ADDRESS...

Page 188: ...he separators X 3B Define only the parameters specifying the visual attributes Define the terminating character Example To define a field with high intensity 1 blinking 5 and reverse video 7 the seque...

Page 189: ...he left the terminal performs that action even if the new position contains an attribute The setting of bit 3 of the UDT Flag byte SCROLL must be zero The 3708 must be able to send a character or attr...

Page 190: ...e ASCII sequence that should be sent to the terminal to cause it to use a screen size of 32 x 80 The first byte of the field should contain the count in hexadecimal of the number of characters in the...

Page 191: ...ence TLIS both or neither This is a 61 byte field used to define a sequence to be sent to the terminal at the beginning of the protocol conversion session The first byte of the field should contain th...

Page 192: ...ion Cartridge Feature No 8313 ADDS Applied Digital Data Systems Viewpoint Beehive ATL 078 Data General Dasher D210 Display Terminal DEC Digital Equipment Corporation Models VT52 VT100 and VT220 FALCO...

Page 193: ...sing the PF13 function The same special consideration applies to PF13 PF24 IBM 3164 When initiating a protocol conversion session the 3708 sends the command to put the 3164 into program color mode The...

Page 194: ...of the introductory sequence is ignored Table 4 17 DEC VT220 Extended Terminal Table Sequence Hex Function Address VT220 Key Generated Function Description 000118 F6 IB5B31377E OC PF13 000119 F7 IB5B...

Page 195: ...011A F3 IB5B33337E OE PF3 ooOl1B F4 IB5B33347E OF PF4 00011C 10 IB5B33357E PF5 F5 000110 F6 IB5B31377E 11 PF6 00011E F7 IB5B31387E 12 PF7 00011F F8 IB5B31397E 13 PF8 000120 F9 IB5B32307E 14 PF9 000121...

Page 196: ...ng for the status line area Beehive The 3708 accepts DC2 and DC4 characters for pacing from the Beehive terminal because the Beehive uses these characters to pace data to the printer port The 3708 tre...

Page 197: ...ET CURSOR ADDRESS to 0 0 upper left hand comer 5 CLEAR SCREEN 6 STOP PRINTER2 7 If the terminal supports an addressable status line flag bit 1 is set to 1 in the terminal table the status line is sent...

Page 198: ...the character itself is used as an index into the control code part of the keyboard mapping definition section of the terminal table being used The I byte function number found at that location in th...

Page 199: ...in a field whose attributes are different from those that were active when the last character was transmitted to the terminal the 3708 may send an attribute defining sequence highlighting on off or c...

Page 200: ...set support 7 bit ASCII characters with or without parity 256 character set support with the LV type 1 SCS data stream XON and XOFF pacing using only the DCI and DC3 ASCII codes The printer must supp...

Page 201: ...tream does not use the Set Vertical Format command to initialize the page length parameter MPL this configuration value must be set to the desired page length Printer Authorization Matrix print mode p...

Page 202: ...the 3708 to discard all remaining parts of the current SNA chain Only the key sequences shown cause these functions the user cannot define other key sequences Local Copy Function The 3708 provides a l...

Page 203: ...LV type 1 SCS or 3 DSC BIND request from the host is rejected with a negative response of X 0801 printer not assigned System mode A printer in system mode is entirely under host control The printer ca...

Page 204: ...DEVICE LIST the fourth field of the screen contains one position for each of the 10 ports on the 3708 Entering a 1 for a port authorizes the display on that port to use the printer Note If the printer...

Page 205: ...herefore reserved for exclusive use by the host Note Source devices are associated with destination devices instead of classes For example the user can define several printers in class 75 but may have...

Page 206: ...ollowing reasons The printer is not physically attached to the 3708 The printer is not powered on The printer is attached to a switched line and a call has not been established The printer is part of...

Page 207: ...X message appears in the status line The IDENT function ends and the keyboard locks The user can press RESET and try the print ID sequence The print ID returns to the ID in use before the IDENT functi...

Page 208: ...ting operation is complete the Printer Printing indicator is replaced by the original print ID and the Printer Busy message is cleared If the printer stops during a local copy operation out of paper p...

Page 209: ...choose not to wait for the LUSTAT but to continue with other display work The 3708 sends the LUSTAT when a printer becomes available whether or not the host LU has gone on to perform other display wo...

Page 210: ...wo devices are sharing one physical port of the 3708 The 3708 allows this feature if it is operating in protocol conversion mode the display is operating in an LU type 2 session and the printer is ope...

Page 211: ...he next two sections In the definition of the host port at the 3708 the options that are affected by attachment of a display with printer are the Host Printer Source Field and the Host Keyboard Source...

Page 212: ...on Restrictions No printer session with the host or local copy from other users is allowed until the display is operating in an LU type 2 protocol conversion session either to a host or as the 3708 co...

Page 213: ...cility can be used when users notice that a printout is interrupting their display sessions too often and wish to force the printout to finish To allow display output again the user must enter the Res...

Page 214: ...708 to echo the same sequence back to the 3101 When received there the 3101 performs a line print operation These local screen capture sequences are already defined for supported terminals that provid...

Page 215: ...4 94 IBM 3708 Description...

Page 216: ...r to IBM 3708 Network Conversion Unit Planning and Installation Choices are Keyboard Display Keyboard Printer Printer and Keyboard Display with Printer Of these options only Keyboard Display and Keybo...

Page 217: ...y stops data being transmitted to the terminal only when an HDX control unit is specified Choices are 1 Yes or 0 No When the echoplex option is selected the 3708 transmits characters back to the termi...

Page 218: ...oves the parity bit parity bit set to zero if 7 bit data is specified If Ignore Parity is configured to No the 3708 replaces any character it receives from the downstream device with the parity error...

Page 219: ...Attention Key Substitution Character Choices are X I 00 I X I FF I The break key on asynchronous devices is used when emulating the terminal attention key while in protocol enveloping When a terminal...

Page 220: ...of the defined line turnaround LTA characters act as end of message characters and tell the 3708 when the downstream device has finished data transmission When operating with an HDX control unit once...

Page 221: ...etion of a host message End of SNA Chain or if logon screens are suppressed when an ACTLV has been received to indicate that the system logon may be entered Some host applications like TSO provide pro...

Page 222: ...ard printers This value defines the number of DEL characters X 7F to be sent after carriage return CR or horizontal tab HT to allow the print head to be repositioned before sending more data Notes 1 S...

Page 223: ...tandard Operations for more information 2 Do not use for keyboard displays Choices are 000 255 Specify this option for HDX facilities ollly When an HDX line turns around it requires time to stabilize...

Page 224: ...F characters before it is bound However it does not perform the erase end of line function associated with NL Once bound NL is translated to LF when default translation is selected Therefore SSCP data...

Page 225: ...g data to the terminal If no data is being transmitted by the user or the host and the user presses BREAK the 3708 performs the following action Transmits an SNA Signal command to the host application...

Page 226: ...k Level Headers Trailers removed SNA Level Headers removed r Optional Translation EBCDIC to ASCII Host Data Additional characters may be inserted DEVICE for hard copy devices BUFFER for Line Quiet WRI...

Page 227: ...ed in the SNA header After the host message has been transmitted and if no more host data is waiting to be sent the 3708 checks to see if a read prompt is defined If a read prompt is defined the read...

Page 228: ...a system buffer The translated data character is tested to see if it is a LTA character If the current receive transaction is terminated the data contained in the current system buffer is transmitted...

Page 229: ...xt timeout to trigger data transfer to the host Otherwise data should be padded to an RU boundary 256 bytes to guarantee timely transfer to the host While the 3708 does not explicitly support autodial...

Page 230: ...om a terminal attached to the 3708 This procedure is described later in this chapter ChOOSing an ASCII Host The definition of an ASCII host includes a source device list that identifies the display po...

Page 231: ...000000000000000DO Received Transmitted Data Data DEVICE BUFFER Transmitted Data Terminal Port Device Buffer Received Data ASCII Host Port Device Buffer DEVICE BUFFER Host Port 000000000000000000000000...

Page 232: ...e CTS or DSR drops the 3708 drops the connection to the partner port BREAK When a BREAK is received from one of the ports the 3708 generates a BREAK to the other however the length of the 3708 generat...

Page 233: ...mand to the terminal after the Terminal Type C2 and Host Selection C3 logon screens To prevent this command from causing any possible problems with operating in ASCII pass through mode is recommended...

Page 234: ...8 transmits a BAT Basic Assurance Test test pattern to verify the readiness of 3708 USARTs during extended diagnostics testing only This function is useful if the BAT test pattern causes an attached d...

Page 235: ...he ECHOPLEX option is used When this bit is set to zero the ECHOPLEX option determines whether characters are echoed during 3708 logon xxxxxxxx xlxxxxxx Bit 10 I The 3708 transmits an XON X 11 instead...

Page 236: ...be configured to transmit a TERMSELF If this bit is set to 0 and the host is configured to send a TERMSELF the 3708 transmits a TERMSELF 40 This type of TERMSELF is useful when using gateway applicati...

Page 237: ...7 4 IBM 3708 Description...

Page 238: ...vers Errors for temporarily unowned devices Unowned devices are devices that have logged onto the 3708 but have not yet been assigned to the SNA host Errors for temporarily unowned devices are identic...

Page 239: ...se of operational or procedural error A security alert is used to report system detected incidents that indicate exposure to security problems A performance alert is sent for a port that exceeds a pre...

Page 240: ...with the base or cartridge or with a downstream link The 3708 error analysis ERA task identifies the probable cause of these errors If the 3708 recovery routines cannot resolve a resource failure the...

Page 241: ...Not applicable for downstream ports Counters refer to secondary end of link Counters always solicited Counters at maximum value until reset by a REQMS solicitation Response Time Monitor RTM Request C...

Page 242: ...pdated after all data for the first session has been sent If a solicited response is pending on session unbind or if an RTM counter overflows flags are sent to indicate the multiple reasons for the re...

Page 243: ...eported to the host system These reported situations are not necessarily errors or other undesirable incidents but generally indicate the need for some form of attention or intervention The event data...

Page 244: ...ASCII host problem determination for the 3708 consists of logging a generated alert at the control terminal and transmitting the alert to all active SNA hosts The 3708 does not send an alert to an ASC...

Page 245: ...ector Detail Qualifier Subvector Hex or EBCDIC Detail Qualifier Subvector Hex or EBCDIC Detail Qualifier Subvector Hex or EBCDIC Hierarchy Names Subvector 2 Table 8 1 Page 1 of 3 NMVT 0000 Record Form...

Page 246: ...amp 53 Length of basic alert subvector p 1 54 X 91 type code for basic alert 55 X 00 retired field 56 Alert type 57 General cause code 58 59 Specific cause component code 60 61 Alert description code...

Page 247: ...m line name in LP record in EBCDIC This name is equal to the Device Line Name configured in the 3708 by the control terminal operator X D3C9DSCS link type LINE in EBCDIC X 09 length of this field and...

Page 248: ...e error LU task Delayed recovered control unit hardware error Delayed recovered hardware error Delayed recovered microcode error Delayed recovered hardware error Temporary control unit error Permanent...

Page 249: ...X in EBCDIC Serial Number OOXXXXX in EBCDIC Emulated Product 3274 61C in EBCDIC Detailed Text Reference Codes The detail description code in the NMVT corresponds to an alert ID displayed on the alert...

Page 250: ...t a NetView default or a NPDA default If the threshold is exceeded NetView or NPDA creates a performance threshold exceeded PERF event record and records the original data as a statistic The Most Rece...

Page 251: ...ifier subfield X 00 r 1 19 X 00 hardware product identifier subfield 20 X 12 format type 21 24 Machine type 3708 in EBCDIC 25 27 Machine model number in EBCDIC 28 29 Serial number modifier in EBCDIC 3...

Page 252: ...Transmit data counter Bit 1 Poll counter Bit 2 Transmit error counter Bit 3 Receive data counter Bit 4 Receive data counter Bit 5 23 Reserved 89 90 Transmit data counter 91 92 Poll counter 93 94 Tran...

Page 253: ...98 Inactivity timeout Alert A101 Receive queue overrun Alert AI02 Port Password Retry limit exceeded Alert AI05 Control Terminal Password Retry limit exceeded Alert A106 Control Terminal Diagnostic Fa...

Page 254: ...is test verifies proper operation of the signal lines transmitters and receivers on all ports Memory test This test verifies addressing and data signals as well as data cells in the base The 3708 runs...

Page 255: ...response formats Host Requirements No specific host support is required however RTM has a host interface for SNA communication Host programming support NLDM Release 2 is available for the setting of...

Page 256: ...s The total response time is also kept for each logical terminal Each time a counter including the overflow counter is incremented the corresponding transaction time is added to a total time register...

Page 257: ...ARD UNLOCKED 8 20 IBM 3708 Description With SNA protocols the measurement is terminated when the next outbound operation other than a read to the terminal contains one or more of the following items C...

Page 258: ...Timer NOT stopped Timer stopped Timer stopped Timer stopped Timer NOT stopped Timer stopped Timer stopped Timer stopped 1 EB and CD received in an exception response request or in a definite response...

Page 259: ...708 If the reset bit is included in the request the RTM data for that LU is reset upon transmission of the record This reset function includes the RTM counters including overflow and the total transac...

Page 260: ...mit unsolicited RTM information when UNBIND is processed for an LU LU session or when an RTM counter overflows When one of these conditions occurs the associated RTM information is scheduled within th...

Page 261: ...or the bytes that are checked by the 3708 Host Request and 3708 Response Formats This section contains the SNA transmission header TH request header RH request unit RU formats for the host request and...

Page 262: ...0 b O Reserved I b O Last RU 2 b O First RU 3 b SNA address list indicator 4 7 b OOOO o No vector 1 Vector describes specific LU Reserved RU8 0 b O No concatenation 1 7 b OOO 0000 Remaining length of...

Page 263: ...tatus 1 b 1 Unsolicited on session end 2 b 1 Unsolicited on counter overflow 3 b O 1 Unsolicited on time interval 4 b 1 RTM definition code 5 b 1 RTM boundaries 6 1 Unsolicited on BIND 7 b O 1 Subsyst...

Page 264: ...be lost during recovery 2 Because of the characteristics of the SSCP PU session the 3708 defaults to contention state Should an alert 3708 RTM response or RECFMS be queued for inbound transmission th...

Page 265: ...der 2 1003 Not an REQMSJRTM request 7 0835 Only bit 3 SNA address list present can be set 9 0835 Invalid remaining length 10 11 0835 Unsupported major vector 12 0835 Invalid length for SNA address lis...

Page 266: ...byte positions are adjusted accordingly 3708 Responses Format The basic format of the 3708 solicited and unsolicited response is TH RH RU RTM Header Length to End of RU RTM Data Reply Vector SNA Addre...

Page 267: ...header RU3 4 X OOOO Ignored RU5 0 b O Reserved RU6 I b O Reserved 2 b O Ignored 3 b O Ignored 4 15 PRID from request 000 if unsolicited RU7 0 b o Unsolicited 1 Solicited 1 b o Last 1 Not last 2 b o F...

Page 268: ...b I Specific RTM request for this LU but RTM for this LU is not active 3 b I First response for current LU LU session 4 b I BIND for new session received while in solicited mode only Session data is c...

Page 269: ...subsequent BIND for that LU OO FF with wrap aa LU subsystem address RU38 X 07 Length of relative time vector RU39 X 42 Code point for relative time vector RU40 X EF Sequence number not time RU41 X Seq...

Page 270: ...ning RU60 61 X Boundary 4 RU62 63 X Counter 1 RU64 65 X Counter 2 RU66 67 x Counter 3 RU68 69 x Counter 4 RU70 71 x Overflow counter RUn X Total response time through Includes time for all RU75 counte...

Page 271: ...8 34 IBM 3708 Description...

Page 272: ...ceive a clocking signal from the host 3725 If CLOCKNG EXT and ATTACH DIRECT the 3725 will provide the clocking signal and the 3708 should be configured for LINE SPEED 00 If CLOCKNG EXT and ATTACH MODE...

Page 273: ...ated or equivalent LOCADDR The LOCADDR must be 2 greater than the value configured for the 3708 s SNA LU Device Number SSCPFM A 2 IBM 3708 Description The 3708 can support either SSCPFM USSNTO or SSCP...

Page 274: ...end of a line of data In the 3708 an NL character is handled by blanking the remainder of the current line and positioning the cursor at the start of the next line However if VSSNTO was chosen the 370...

Page 275: ...on the LINE PU LU macros associated with the VBUILD TYPE CA macro that supports the 3708 43xx ICA Restrictions The 43xx ICA does not allow the TERM TWX parameter to be specified This means that appli...

Page 276: ...he Station Address parameter configured in the 3708 3708 Name It is recommended that the name defined in the NAME column in the adapter configuration panel for the 3708 device match the name defined i...

Page 277: ...ne operations the 8100 does not support RTM data or 3708 alerts Alerts are however be logged in the 8100 error log 1 The logon screens and or read prompts that can be displayed by the 3708 after a ter...

Page 278: ...s recommended that the control unit description CUD name associated with the System 38 s control unit description definition match the name defined in the 3708 s SNA PU Network Name This is not requir...

Page 279: ...are only supported as LU type 1 SCS RTM data is not supported Alerts are not supported Unformatted session services are not supported Logons to the System 38 are accomplished by the normal System 38...

Page 280: ...the 3708 There are several considerations due to this double emulation The majority of these differences are described in the Table A Ion page A lO For more details refer to the IBM System 38 Programm...

Page 281: ...70 Help key lets the user see the present assignments for the work station Table A l 5250 Default PF Key Assignments 5250 Help Function Help 3270 Help Clear Print 3270 Display of 5250 Extended Attribu...

Page 282: ...e port password limit at 1 until the correct password is chosen Once the correct password is entered the 3708 once again uses the defined port password retry limit Control Terminal Password The 3708 a...

Page 283: ...cted message Transmission of UNBIND OF and or TERM SELF 40 The 3708 transmits an UNBIND OF and NOTIFY power off or TERM SELF 40 and NOTIFY power of or just NOTIFY power off SNA command to the host to...

Page 284: ...port If the host institutes an error recovery procedure then the session that was broken could be recovered by a host that disregards accounting and security measures Security Features The 3708 monito...

Page 285: ...B 4 IBM 3708 Description...

Page 286: ...Fs allows faster recovery from 3708 Slowdown mode should the condition ever occur Minimize the upstream polling delays This can be done by taking one of the following actions Define the connection bet...

Page 287: ...mode the 3708 is entering buffer slowdown or a slow downstream device is causing 3708 performance to suffer These devices may be accommodated also by requiring outbound pacing in the BIND command Incr...

Page 288: ...guration and mode of operation the 3708 performs certain functions for example when it recognizes certain characters such as line turnaround or control characters or detects error conditions such as p...

Page 289: ...VE QUEUE PACING THRESHOLD option The RECEIVE QUEUE PACING THRESHOLD allows the user to specify whether the 3708 transmits an XOFF when its receive queue is 50 RQPT 1 or 75 RQPT 2 full The 3708 transmi...

Page 290: ...o be transmitted to the host Using a two for one expansion the ESC would be expanded and transmitted as two ASCII characters X 31 X 42 the number 1 and the letter B in ASCII Files that contain binary...

Page 291: ...ost The character with the bad parity is echoed back to the Pc Error checking and recovery are the responsibility of the PC and host file transfer programs Independent of the parity and echoplexing co...

Page 292: ...f 256 character sets are possible Encryption is not required The PC transmits its line of data to the host the receive queue cannot be overrun The 3708 sends the line of data to the host in one or mor...

Page 293: ...een modified into one or more system buffers and transmits the updates to the SNA host Overflow of the Receive Queue Encryption As in protocol enveloping it is possible to overflow the 3708 s receive...

Page 294: ...r containing a parity or framing error The status line is not updated and the keyboard is not locked If enhanced null blank processing is off these null characters are suppressed when sent to the host...

Page 295: ...f data This continues until the entire file has been uploaded a different AID key could signal the end of file transfer If during transmission a parity or framing error occurs the PC program can eithe...

Page 296: ...scription of internal 3708 queues and buffers In ASCII pass through data from the PC and the ASCII host is received in a 980 byte receive queue Overflow of this receive queue results in loss of data G...

Page 297: ...D IO IBM 3708 Description...

Page 298: ...otherwise unnecessarily use up RAM space thereby reducing the number of system buffers The number of system buffers available is a function of the 3708 configuration The following configuration optio...

Page 299: ...cessary to satisfy the requirements of large block transfers from the terminal to the host However use of larger than necessary receive queue sizes provides no advantage and unnecessarily uses up RAM...

Page 300: ...708 sends a blank and stores the order in a buffer If the high order bit in the translated character is on the 3708 sends a colon Data that is sent to the host is translated from ASCII to EBCDIC Howev...

Page 301: ...art are undefined If an undefined character code is programmed the character that will be displayed or printed is a colon hex code 7A will be returned on a subsequent read operation 2 CR NL EM and FF...

Page 302: ...100 4C 10 1100 6C 00 1101 40 10 1101 60 00 1110 4E 10 1110 6E 00 1111 I 4F 10 1111 6F 01 0000 50 11 0000 0 FO 01 0001 J 01 11 0001 1 F1 01 0010 K 02 11 0010 2 F2 01 0011 L 03 11 0011 3 F3 01 0100 M 04...

Page 303: ...le EBCDIC EBCDIC Code Character AD BD 5A 4F I 4A ASCII Code 3A 3A 5D 21 5B ASCII Code 5B 5D 21 7C 5C ASCII Character ASCII Character I I Note When using the alternate translate table two sets of EBCDI...

Page 304: ...7 DEL 7F DEL 000008 08 N A 3A 000009 09 N A 3A OOOOOA OA N A 3A OOOOOB OB VT OB VT OoooOC OC FF OC FF oooooD OD CR OD CR OoooOE OE SO OE SO ooOooF OF SI OF SI 000010 10 DLE 10 DLE 000011 II DCI XON II...

Page 305: ...036 36 N A 3A 000037 37 EDT 04 EDT 000038 38 N A 3A 000039 39 N A 3A 00003A 3A N A 3A 00003B 3B N A 3A 00003C 3C DC4 14 DC4 00003D 3D NAK 15 NAK 00003E 3E N A 3A 00003F 3F SUB lA SUB 000040 40 b 20 b...

Page 306: ...00063 63 N A 3A 000064 64 N A 3A 000065 65 N A 3A 000066 66 N A 3A 000067 67 NjA 3A 000068 68 N A 3A 000069 69 N A 3A 00006A 6A I 7C I I I 00006B 6B 2C 00006C 6C 25 00OO6D 6D 5F oo006E 6E 3E 00006F 6F...

Page 307: ...8F 8F NjA 3A 000090 90 NjA 3A 000091 91 j 6A j 000092 92 k 6B k 000093 93 1 6C 1 000094 94 m 60 m 000095 95 n 6E n 000096 96 0 6F 0 000097 97 P 70 P 000098 98 q 71 q 000099 99 r 72 r 00009A 9A N A 3A...

Page 308: ...3A OOOOBD BD 3A OOOOBE BE N A 3A OOOOBF BF N A 3A OOOOCO CO 7B OOOOCI Cl A 41 A 0000C2 C2 B 42 B 0000C3 C3 C 43 C 0000C4 C4 D 55 D 0000C5 C5 E 45 E 0000C6 C6 F 46 F 0000C7 C7 G 47 G 0000C8 C8 H 48 H 0...

Page 309: ...OOE6 E6 W 57 W 0000E7 E7 X 58 X 00OOE8 E8 Y S9 Y 00OOE9 E9 Z SA Z OOOOEA EA NjA 3A OOOOEB EB N A 3A OOOOEC EC N A 3A OOOOED ED N A 3A OOOOEE EE N A 3A OoooEF EF NjA 3A OOOOFO FO 0 30 0 OOOOFI Fl 1 31...

Page 310: ...K 000107 07 BEL 2F DEL 000108 08 BS 16 BS 000109 09 HT 05 HT 00010A OA LF 25 LF 00010B OB VT OB VT 00010C OC FF OC FF 00010D OD CR OD CR 000toE OE SO OE SO 00010F OF SI OF SI 000110 10 DLE 10 DLE 0001...

Page 311: ...7 7 F7 7 000138 38 8 F8 8 000139 39 9 F9 9 00013A 3A 7A 00013B 3B 5E 00013C 3C 4C 00013D 3D 7E 00013E 3E 6E 00013F 3F 6F 000140 40 7C 000141 41 A CI A 000142 42 B C2 B 000143 43 C C3 C 000144 44 D C4...

Page 312: ...d 84 d 000165 65 e 85 e 000166 66 f 86 f 000167 67 g 87 g 000168 68 h 88 h 000169 69 i 89 i 00016A 6A j 91 j 00016B 6B k 92 k 00016C 6C 1 93 1 00016D 6D m 94 m 00016E 6E n 95 n 00016F 6F 0 96 0 00017...

Page 313: ...F 14 IBM 3708 Description...

Page 314: ...F extended error information field System virtual storage EEPROM electrically erasable programmable read CNM communication network management only memory CNMI Communication Network Management EFI expe...

Page 315: ...LIC last in chain PRTS permanent request to send LIS last in segment PT program tab LM left margin PU physical unit LTA line turnaround QRI queued response indicator LU logical unit RA repeat to addre...

Page 316: ...n complete TxC transmit clock SHUTD shutdown TxD transmit data SLD set line density UA unnumbered acknowledgment SLU secondary logical unit UDT user defined terminal SNA systems network architecture V...

Page 317: ...X 4 IBM 3708 Description...

Page 318: ...set of control functions that augments ASCII control functions as described in ANSI X3 64 and that controls input and output for two dimensional character imaging devices such as displays or printers...

Page 319: ...3708 Description local character set identifier 2 An attribute type in the extended field and character attributes 3 An attribute passed between session partners in the Start Field Extended Modify Fi...

Page 320: ...way independent transmission in both directions Synonymous with full duplex EBCDIC Extended binary coded decimal interchange code A coded character set consisting of 8 bit coded characters echo A feat...

Page 321: ...ion or EIA 422A connections It is used to force disconnection of a device after the X 8 IBM 3708 Description specified length of time has passed with no input from downstream device This timer is ofte...

Page 322: ...tion physical unit PU In SNA the component that manages an monitors the resources such as attached links and adjacent link stations of a node as requested by an SSCP via an SSCP SSCP session platen TC...

Page 323: ...structions SOT clear and X tO IBM 3708 Description STSN are SESSIONC indicators All SESSIONC indicators are sent with a SESSIONC macro instruction Set Attribute SA order An order that associates attri...

Page 324: ...ser user defined terminal table A table that a customer creates in storage which contains information for a keyboard mapping used to define a terminal wraparound 1 TC97 In computer graphics the displa...

Page 325: ...X 12 IBM 3708 Description...

Page 326: ...tion of X S formats 4 S8 4 67 intermediate control sequence character 4 62 ASCII characters F l definition of X S ASCII devices description of 1 16 meaning of term 1 1 supported in protocol conversion...

Page 327: ...hase 3 30 clear command description of 3 29 function of with large screens 4 49 7 2 X 14 IBM 3708 Description color four color support 4 66 how supported 4 33 restrictions 4 68 toggle 4 52 commands ac...

Page 328: ...n CR cursor addressing class 4 61 description of 4 45 down 4 46 cursor continued left 4 46 movement functions 4 46 right 4 46 select CURSR SEL 4 49 up 4 46 CURSR SEL cursor select 4 49 customer define...

Page 329: ...platen length 4 35 local copy errors 4 87 X 16 IBM 3708 Description emulating 3270 terminals continued location of status line 1 8 screen option 4 25 screen sizes supported 1 8 setting up the termina...

Page 330: ...n 4 54 formatted printouts 4 15 framing errors controlling 3708 s response to 7 1 in ASCII pass through mode 6 3 in protocol conversion mode 1 9 in protocol enveloping mode 5 3 status line message ind...

Page 331: ...sert 4 47 insert cursor IC 4 12 X 1S IBM 3708 Description interchanging primary and secondary hosts 3 7 interface types 4 26 intermediate control sequence character 4 62 interrecord separator IRS 4 21...

Page 332: ...2 9 suppressed 5 6 3708 transmits C4 2 11 Logon Screens Excluded 6 4 LU See logical unit LU LU Status LUSTAT 3 32 LUSTAT LU Status 3 32 M middle in chain 3 36 modem eliminator definition of X 8 modem...

Page 333: ...zontal tab 4 21 INP inhibit presentation 4 21 IRS interrecord separator 4 21 LF line feed 4 21 list of 4 19 NL new line 4 21 SA set attribute 4 24 SHF set horizontal format 4 22 SLD set line density 4...

Page 334: ...EBCDIC translation in 1 8 bits character choices in 4 26 protocol conversion mode continued buffer formatting supported 1 9 color in 1 8 configuring printer for 4 79 control orders supported in 1 9 c...

Page 335: ...of X 9 P__ 4 86 R RA repeat to address 4 12 RAM in base 1 6 read buffer command 4 7 X 22 IBM 3708 Description read modified all command 4 10 read modified command description of 4 8 full read modified...

Page 336: ...ription of 3 48 selecting screen sizes for large screen emulation 4 33 selector light pen read modified response 4 10 send read prompt option 5 6 sense codes 3 42 session indicator 4 39 sessions disco...

Page 337: ...r 4 42 format of 4 39 graphics 4 39 list of terminals with 4 38 location on 3270 terminals 1 8 messages 4 39 mode indicators 4 42 MYJOB 4 39 N B 4 42 operator controlled 4 38 operator viewed 4 38 P 4...

Page 338: ...C transmitting 3 32 40 session security 3 19 3 29 40 transmission of B 2 TERM TWX 5 9 test mode description of 8 17 test normal switch LED sequence when held 2 2 text timeout 5 6 time stamps 2 18 time...

Page 339: ...ion of X II X 26 IBM 3708 Description 3270 data stream continued definition of X ll erase all unprotected EAU command 4 6 erase write alternate command 4 6 erase write command 4 6 four color support o...

Page 340: ...cked at the location to which this form is addressed Please direct any requests for copies of publications or for assistance in using your IBM system to your IBM representative or to the IBM branch of...

Page 341: ...nd tape ij II THE BUSINESS REPLY MAIL FIRST CLASS PERMIT NO 40 ARMONK N Y POSTAGE WILL BE PAID BY ADDRESSEE International Business Machines Corporation Dept E02 P O Box 12195 Research Triangle Park N...

Page 342: ...GA 27 3768 0 1...

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