GTE Omni Si Database Technical Practices Issue 1 Manual
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TL-130500-1001* System Generic Disk l System Data Base Disk 0 Options Disk I, Overlay Programs/MDR 0 Options Disk Ill, Diagnostic l Options Disk IV, Data Switch Generic l Options Disk V, Data Switch Generic NOTE: File contents of disks are subject to change due to new SVRs and/or customer alterations. ADMP-C accesses the system hard disk via the SASI (Shugart Associates Standard Interface) bus and the FMS (File Management System) card. Hard Disk Drive FMSD card FB-1 722O-BOA PBEITII I >A,NIC1I1 1 -/ Floppy(connects to Disk DriveDDC card)LPB Bus PCM Bus Figure 8.1FMSD Interface NOTE: The FMSD card is interfaced to the PD-200 Data System ADMP-C card via the DDC (Disk Drive Controler) that is attached to the hard disk. S-l 24 8187SVR 5210
TL-130500-1001File Management8.2.2 With the data option, the FMSD provides an System Datainterface for the voice system, microprocessor, and disk drive controller as well as the data system (see Figure 8.2, 8.3). This interface is through the ADMP via the SASI (Shugart Associates Standard Interface) bus. The SASI bus is a ribbon cable. DFP/VPLC-2 El--APM LOCAL PACKET BUSFILE MANAGEMENT SYSTEM CARD DATA MAINTENANCE l-w . ------DATArI I IIL---------J BUS (See Note) . . . . . . . . . . . . . . . . .; ---------------~DATAI nTERMINALI I I (LED0.8 MB FLOPPY DISK DISK DRIVE CONTROLLER WC) -EW-1:O MBHARD DISK NOTE:SHUGART ASSOCIATES ISYSTEM INTERFACE UNIVERSAL CONTROL BOARD (UCB)I I L--~-~-~~~~~~~~~~~~-----~--~J Figure 8.2Simplified Disk System Interface SW 52108i87S-l 25
TL-130500-1001j_____----_--_____---------------ICEC BUS 4.. . . . . . . .DISK DRIVESYSTEM DATA I 1 FD-1061-BPI 1 I 1 I 1 I 1ADMINISTRATIVESASI ’II 1ANDASSEMBLY EC-221 99-AIIL ------ ----__- --__BUS ) I L-------------------MAINTENANCE:____-_______--_---_------------~PEC BUSPROCESSOR (ADMP-C) LPBFB-17230-BOAI -.^ ^ -__--. . .. - . . S-l 26tlgure 8.3FMSD and Hard Disk Assembly Interface File Management System Data8.2.3 The file management system’s files are described in full Commandsin paragraph 4.9.3. FMS commands that are used only for the data option are as follows: l Administration and Maintenance Command Descriptions: - Format Command. The Format command can initialize a blank disk for use by the FMS. - Reset Command. The Reset command requests FMS to close all open files and release all FlDs which this port (system or ADMP) has opened and seized. Devices which the port has dismounted are mounted, and devices marked private are marked public. - Diagnostic Command. The Diagnostic command can check the integrity of the FMS and associated hardware. - Configuration Command. The Configuration command allows the user to determine what devices are attached to FMS. - Time Command. The Time command allows the system or the ADMP to set the FMS’s internal clock, which is used to time stamp file accesses. - Mount Command. The Mount command is used to allow access to a device. As a subcommand, Mount marks a device as public or private. Devices marked as private will only allow access from the processor which mounted the disk. After the Mount command is issued for a device, FMS will allow files to be opened on that device. 8187SW 5210
TL-130500-1001- Dismount Command. The Dismount command is used to prevent access to a device. After the Dismount command is issued for a device, FMS will not allow files to be opened on that device. As a subcommand, the device can be marked or retained as a private device, preventing the other processor from mounting the device. Before removing a floppy disk, this command should be used to lock out unwanted access to the disk. Removing a disk on which files are open can result in a loss of data. SASI Bus8.2.4 The SASI bus passes blocks of data between the ADMP and the FMSD. The SASI bus connects the FMSD to the DDC. Refer to Figure 8.4. The ADMP connects to the middle of the SASI bus cable between the FMSD and the DDC (via a mass-terminated 50-pin connector). The SASI bus allows for the following: l Processor-to-processor data transfers l Arbitration for SASI bus control l Host-to-controller communications l ADMP emulates host for disk control (Future) 0 ADMP passes data to/from FMSD. l ADMP requests disk data transfers via processor-processor functions. The SASI bus contains the following signals: . DO-D7 =bidirectional data bus - transfer of eight-bit data between master and slave - addressing slave during selection . RESET =reset slaves, not used for ADMP l SEL = active indicates address of slave on data bus l BUSY = acknowledgment of select . REQ =slave ready to transfer or receive data . ACK =handshake for byte transfers l (C/D) = Command/Data signal from slave as to type of transfer (not used for FMSD/ADMP interface) l MSG = message, indicates type of bus transfer (not used for FMSD/ADMP interface) SVR 5210 8187S-l 27
ADMP IIFMSD Figure 8.4Disk System Cabling Voice and Data8.3 This paragraph describes the transfer of voice and data. Transfer Complex Low -Level8.3.1 The VPLC, VPLC2, UCB, PR and ADMP-A PCBs Buscommunicate with the voice system processor over the PEC low-level bus. The low-level bus is separate from the PCM bus. The low-level bus communicates with and controls the cards that are installed in the PCMUSs (PCM Universal Slots). The processor reads from, and writes to, the cards on the bus by accessing a section of the address space that is mapped to the ports of the cards. The bus control logic translates the access into a card select signal, a port address, and a read/write signal on the bus. It then transmits a byte of data to, or receives a byte of data from, the designated card bus port. Cards such as the PR (Packet Router) and the VPLC (Voice Packet Line Card) are supplied with a register, and cards such as the UCB (Universal Controller Board) card and the ADMP (Administrative and Maintenance Processor) card are supplied with a first-in/first-out interface to the PEC low-level bus. This interface allows them to exchange information with the system. NOTE: Only the VPLC2 and NIC data cards electrically connect to the PCM bus. 8187SVR 5210 TL-130500-1001
TL-130500-1001Voice Switch Pulse8.3.2 The voice switch network provides the ability to connect Code Modulationany two (or more) voice ports (lines or trunks). Communication Networkthrough the network is based upon time-division multiplexing of PCM-encoded samples. The voice signals convert from analog to PCM at the line/trunk card. However, in the Digital Featurephone, the voice signal is converted to PCM in the telephone and passed in the form of mini-packets to the VPLC (Voice Packet Line Card,) where it is de-packetized. A card select and port select signal is sent from the network control logic to the VPLC to gate a PCM sample onto the 24-channel file PCM bus. The file buses combine into a 96-channel bus that is fed into the 192-connection time-slot interchange switch. The time switch transfers the sample to the appropriate outgoing time slot, and the sample follows the reverse path to the terminating port. Packet Transport8.4 The packet transport system hardware (Figure 8.5) switches Systemmini-packets between the various devices connected to it. All control and user information exchanged within the data system uses the packet transport system. Mini-packets are self-routing, fixed-length entities, which contain addressing information lpacket line addresses), user data, and error-detection information. Two versions of mini-packets are used. Internal mini-packets are those that are transmitted within the central switch itself. External mini-packets are those that are transmitted across a local access medium (such as a pair of wires) to/from a remote processor. The conversion between internal/external formats is performed in the voice packet line cards which provide access to the local access medium. Mini-packets are assigned access to the switching and transmission hardware upon demand and are transported over the LPB. SW 52108187s-1 29
TL-130500-1001Figure 8.5Transportation of Mini-Packets over LPI3IS-l 30Local Packet Bus8.5 The LPB (Local Packet Bus) consists of eight leads and is essentially two separate buses. The first is a two-bit-wide data bus. The second, a two-bit-wide time-division-multiplexed bus, transfers packets and encodes busy status indications. Both buses operate off the same 1.544-MHz clock, and both use the same frame synchronization line to maintain the link. Any hardware which connects to the LPB for communication is referred to as a packet line interface. Each packet line interface uses 1 of the 504 packet line addresses on the local packet bus. In addition to providing a full-duplex data transmission facility capable of receiving 12,000 incoming (toward the packet router enhancer) and sending 12,000 outgoing (from the packet router enhancer) mini-packets per second, the local packet bus provides for the real-time exchange of the status information of each packet line interface. 8187SVR 5210
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