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14. TERMINILOGY EXPLAINED
COMMISSIONING=
A procedure using predefined performance criteria to check a system for acceptance by the end user.
HIGH IMPEDANCE TAPPING=
A method used to extract data from a communication line with minimal electric disturbance.
INBOUND CALL=
An external phone makes a call to a local phone
INTERNAL CALL=
A call between 2 local phones, also called a local call
ITSP=
Internet telephony service provider
JBOD=
An acronym for Just a Bunch Of Disks. A group of hard drives in a RAID controller are not set up as any
type of RAID configuration. All drives are available to the operating system as an individual disk. JBOD
does not provide data redundancy. JBOD is not supported by APRESA
LOCAL CALL=
A call between 2 local phones, also called a internal call
OUTBOUND CALL=
A local phone makes a call to an external phone
RAID=
Is an acronym for "Redundant Array of Independent Drives". Refers to an array of multiple independent
hard drive drives that provides high performance and fault tolerance. The APRESA supports Single
Disk, RAID1 and RAID5
RAID0=
RAID 0, also referred to as "striping", writes stripes of data across multiple disk drives instead of just one
disk drive. RAID 0 does not provide any data redundancy, but does offer the best high-speed data
throughput. RAID 0 breaks up data into smaller blocks and then writes a block to each drive in the array.
Disk striping enhances performance because multiple drives are accessed simultaneously; the reliability
of
RAID Level 0 is less because the entire array will fail if any one disk drive fails, due to a lack of
redundancy, the reliability of RAID Level 0 is less because the entire array will fail if any one disk drive
fails.
RAID1=
RAID 1 is also known as "disk mirroring"; data written on one disk drive is simultaneously written to
another disk drive. Read performance will be enhanced if the array controller can, parallel, access both
members of a mirrored pair. During writes, there will be a minor performance penalty when compared to
writing to a single disk. If one drive fails, all data (and software applications) are preserved on the other
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INSTALLATION MANUAL APRESA
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