GTE Omni Si Database Technical Practices Issue 1 Manual

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The input to the INCKS card is frequency-synchronized and can
be selected manually by the Advance Sync button on the 
FB-20922-A card (Figure 4.11). Pushing the button selects the next
highest 
SINX input from the one in which the clock card is
currently locked. One of the four 
SINX channels can also be
selected by writing onto the data base. A bad input cannot be
selected by programming. The card will always automatically
release its frequency synchronization mechanism from a faulty
SINX input and lock onto the next available good SINX output.
8187CABLE
CONNECTORS
r-
,FB-20922-A
ADV SYNC
FB-20922-A
NETWORK CLOCK
CARD HANDLEYELLOW
INDICATOR
LAMPS
ADVANCE SYNCHRONIZATION
PUSHBUTTON FOR MANUAL
MASTER COCK SELECTION
/CRYSTAL 
ADJUSTMENACCESS POINT
/
Figure 4.11INCKS Card Handle View
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Tones and Tone4.7 Table 4.3 defines the digitally generated tones supplied
Generationby the OMNI SI. These tones are used in the normal operation of
various features.
Memory Page Card4.8 The selector switch (Figure 4.12) on the Memory Page card
MPG16(FB-17213-BOA) is for manual selection of the memory data
page.S-84
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Table 4.3Tones and Tone Generation
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Table 4.3Tones and Tone Generation (Continued)*Level of tones at the point of departure from the system
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							SVR 5210TL-130500-1001THUMBWHEEL
0DATAPAGEFB
:
(7DO2I  I;
Tf2
:i3101511
12E9
13 1416715D6THUMBWHEEL
D7Figure 4.12
Memor; Page Card
CAUTION
For normal service operations, thumbwheel must be set at 2.
Mass Storage4.9 This paragraph describes the mass storage for the system’s
software.
Disk Subsystem4.9.1 The 
OMNI SI uses the disk subsystem for system loading,
data base back-up, and loading of recent change overlay
programs. The hard disk (Figure 4.13) stores program and data
images associated with the voice system processor and program
and data base images for the data system.
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NOTE: See section 6.0 for information on the disk subsystem for
a system containing the PD-200 data option. In addition,
the hard disk contains the Recent-Change and off-line
maintenance programs which are paged into memory
for execution.
The system uses a 1 O-megabyte, Winchester-type 5-l 
14 inch
hard disk drive with or without the data option. The floppy disk
(Figure 4.13) is a 
5-l/4 inch industry standard. The floppy disk
has a capacity of one million bytes of unformatted information
and will store over 650,000 bytes of formatted information. The
floppy disk provides distribution and back-up media for the
system, and loads (initialize) the system during startup.
The FMSD (File Management System Data) card provides the
interface between the voice systems 
microprocesser system and
the DDC (Disk Drive Controller) (Figure 4.13).
The FMSD card, located in the Get Started File, slot 7, controls
the mass storage device of the system. The FMSD card
interfaces the voice switch via the CEC (Common Equipment
Complex) processor bus.
NOTE: See paragraph 8.2 for description of the PD-200 Data
System access to mass storage.
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r---------i r---------i
I
4 y
I
I
I
II
NSDC
11
Ir---------------------------I
I
I
IIFILE MANAGEMENT SYSTEM CARD DATA FILE MANAGEMENT SYSTEM CARD DATAMAINTENANCE MAINTENANCEITTY TTYIII ,IIII8085 pptctcROMIr-lCE”IT1 cl-42kbIMkb
iiAL---------,L-----;-----,---------- --__
r
SASI BUS (See Note)4-b;
(IED0.8 ME
FLOPPY DISK
DISK DHIVE
CONIHOLLER
,
Figure 4.13Simplified Disk System Interface
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VOICE
FILESYSTEMr-----------
Figure 4.14FMSD and Hard Disk Assembly Interface
File Management4.9.2 Random access to files can be supported with disk
Systemstorage. The FMS (File Management System) software manages
all data storage and transfer on the system disks. Simultaneous
access to a single file, along with multiple open files, is possible.
Opening a file causes a FID (File Identity) to be associated with
that file. FMS calls use the FID to identify the file being
accessed.
A high-level command set accesses the mass storage disk
system. The command set is configured as an FCB (File Control
Block). In executing an FMS command, the system processor
constructs an FCB in its memory and informs FMS of the location
of the FCB.
s-90FMS commands are divided into the following categories:
. FILE ACCESS
- Create
- Open (supports 20 files simultaneously)
- Close
- Seize
- Release
- Boot
o DATA TRANSFER
- Read
- Write
- COPY- Seek
a ADMINISTRATION AND MAINTENANCE
- Format
- Diagnostic
- Configuration
- Time
- Mount
- Dismount
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. DIRECTORY MAINTENANCE- Delete
- Rename
- Security (supports two levels - read and write)
File AccessThis paragraph provides a description of the various system
Commandcommands.
Descriptionsl Create Command. The Create command can add a new file to
the disk with the attributes and name given in the command.
With completion of the command, the file opens for the access
method specified in the FCB.
l Open Command. The Open command can open a disk file for
read, write, or update access. Once opened, the user can
access records in the file. The file remains accessible until
the Close command is used.
l Close Command. The Close command can terminate access
to a disk file. Optionally, the FID associated with the file can
be freed for use by other requests. If the user wants
guaranteed access to another file after closing this file, the FID
should be kept and used in the next open file. If released, the
FID is free for another task .
l Seize Command. The Seize command can reserve a
specified number of 
FlDs required for a task. This command
helps avoid deadlock by allowing a task to allocate all the 
FlDsrequired to complete a task.
0 Release Command. The Release command can free up FlDswhich were previously seized. This command makes the 
FlDsavailable for use in other tasks.
* Boot Command. The Boot command can open the file
“FMS$BOOTR” for reading. This command, used by the
system ROM program, loads the Smart Loader Program. The
Smart Loader Program then loads the system generic
program.
Data TransferThis paragraph provides a description of the various system
Commanddata transfer commands.
Descriptions
0 Read Command. The Read command requests a specified
number of records to be transferred from an open file to the
user’s buffer area.
o Write Command. The Write command requests transfer of a
specified number of data records from the user’s buffer area
into a file starting at the current record.
* Copy Command. The Copy command allows record transfer
between two open files. The records are moved only within
FMSD.
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							TL-130500-10018 Seek Command. The Seek command allows the CRP (Current
Record Pointer) of an open file to be repositioned at the
requested record.
DirectoryThis paragraph provides a description of the various system
Maintenancemaintenance commands.
Command
DescriptionsQ Delete Command. The Delete command deletes a file from
the disk by removing its entry in the Disk File Directory and
deallocating the storage used by the file.
* Rename Command. The Rename command can change the
name of a disk file.
0 Security Command. The Security command can change the
read/write security levels of a file.
NOTE: FMS commands that concern the PD-200 Data System
are described in paragraph 8.2.3.
Disk Files4.9.3 Files make up the contents of the disk. Disk files are
subdivided into records.Sectors are used to hold the file’s data
and are called file data blocks. Depending upon the record size,
many records may be stored in one sector, or one record may
use two sectors.
Sectors on the disk are identified by a DBA (Disk Block Address).
DBAs range from 0 to N, where N is the number of sectors on
the disk drive-l. The DBA can be calculated by using a formula
dependent on the physical characteristics of the drive. Usually,
FMSD will only deal with the logical DBA and leave the
composition of the DBA to the DDC (Disk Drive Controller).
(Refer to Figure 4.15 to calculate the DBA.) The disk file
structure shown in Figure 4.16 is typical. The maximum amount
of files is 320. (A summary of the disk file organization operating
under FMS is shown in Figure 4.17).
___--= (cyl-addr head-per-cyl head-addr)
* set-per-trk + set-addr
I
LDBA mnemonics =
cyl-addr = cylinder address
head-per-cyl = heads per cylinder
head-addr = head address
set-per-trk = sectors per track
set-addr = sector address
Figure 4.15 DBA Calculation
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