Sun Microsystems Interface Adapter manual Hsiploop Utility

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If the CTS signal drops before the frame transmission is complete, the frame is discarded and the abort error statistic is incremented. If the transmission underruns, an abort sequence is not sent and the frame is silently discarded. The RTS signal remains asserted until the data transmission is complete.

IBM Half-Duplex Mode

Half-duplex is a submode of the IBM mode (mode=ibm-hdx). Half-duplex mode operates in the same manner as full-duplex mode except that transmission cannot occur while receiving, and vice-versa. When a transmission is completed, the RTS signal is dropped. Dropping the RTS signal tells the remote station to begin transmitting if it is ready to.

IBM MultiPoint Mode

In a multipoint configuration (mode=ibm-mpt), more than two stations share a link. This configuration is accomplished by designating one station as a primary station and the rest as secondary stations. In this mode, the port acts as a secondary station. The primary station arbitrates traffic on the link by polling the secondary stations, to see if they are ready to transmit.

If a secondary station has data to transmit, it will raise its RTS signal and check for CTS signals. When a CTS signal comes up the station may begin transmitting, following the same rules for RTS and CTS signals used in half-duplex mode. When the transmission is complete the secondary drops the RTS signal, which enables another station to respond to a poll and begin transmitting. The RTS signal cannot be dropped until the transmission is complete.

hsip_loop Utility

The hsip_loop utility is high-speed, synchronous, serial loopback test program for high-speed serial interface. The utility performs several loopback tests that exercise the components of a serial communications link. See the hsip_loop(1M) man page for more information.

20 Sun PCI High Speed Quad Port Serial Interface Adapter User’s Guide • December 2005

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Contents Sun Microsystems, Inc Please Recycle Contents Cable Pin Assignments & Signals SunVTS Diagnostic Testing Page Figures Page Tables Page Regulatory Compliance Statements FCC Class a NoticeICES-003 Class B Notice Avis NMB-003, Classe B CCC Class a Notice Page Declaration of Conformity Page Preface How This Book Is OrganizedUsing Unix Commands Shell PromptsTypographic Conventions Related DocumentationThird-Party Web Sites Documentation, Support, and TrainingSun Welcomes Your Comments Product Overview Product DescriptionFeatures SunHSI/U AdapterHardware and Software Requirements 1Hardware and Software RequirementsPage Installation Process SunHSI/U Adapter InstallationTo Install the Adapter External Cabling RS-232 to RS-449 Connections Page SunHSI PCI Software Installation Installation Overview1SunHSI PCI Software Directories and Files Verifying the Software and Hardware Requirements Before Installing the SoftwareTo Remove Older Versions of the Software Installing the Software To Install the SunHSI SoftwareAt the ok prompt, type the boot command with the -roption Configuring the Software To Test the InstallationTo Configure for Point-to-Point Protocol Edit the /etc/netmasks file as follows SunHSI Utilities Hsipinit UtilityT1 Compatibility Options Operating Modes OptionsHdlc Mode Hsiploop Utility Hsipstat Utility Page Cable Pin Assignments & Signals Pin AssignmentsDCD1A Appendix a Cable Pin Assignments & Signals RTS4A Interface Signals RS-449 Interface SignalsPage Null Modem Cable Requirements Configuring Internal or External Clocking Building the Null Modem CableRS-449 Signals RS-449 Null Modem CablePage Appendix B Null Modem Cable Requirements To RS-449 Converter Figure B-3X.21 to RS-449 ConverterT1 Inverted Data and Clock Signals Data Signal InversionBipolar with 8-Zero Substitution Hdlc Zero Insertion AlgorithmClock Signal Inversion Page SunVTS Diagnostic Testing Using the SunVTS sunlink TestPage Man Pages Viewing the Man PagesTo View Man Pages in the C Shell Environment To View Man Pages in Bourne or Korn Shell Environments Make the changes effective in your current windowGlossary Page Index