le79234-sw Zarlink Semiconductor, le79234-sw Datasheet - Page 15

• Manufacturer Part Number: le79234-sw
• Description: Voiceedgetm Control Processor Software Package Next Generation Carrier Chipset Ngcc
• Manufacturer: Zarlink Semiconductor

2.0
2.1
Line test works in linear mode so a minimum of two adjacent time slots per channel are required. The 15-kHz noise
test requires 8 adjacent time slots. For line test the NGVCP keeps an image of the time slot assignments, so there
is no need to do a reassignment. The NGVCP does not however keep track of adjacent time slot usage, so the host
must ensure that the adjacent time slot is not assigned. As an example, if there is a voice channel assigned to time
slot 5, when you request a test to that same channel, the NGVCP will know the channel is on time slot 5, but the
NGVCP will not check to see if time slot 6 is available - the NGVCP assumes this time slot is available.
Another way to manage time slot control is to put the voice time slots adjacent to each other and reserve a block of
20 time slots for testing. The block of 20 time slots will accommodate the following valid combinations:
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Common time slot management options:
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Of course the host must keep a record of the testing time slots already in use and grab an empty one when starting
a new test.
The number of channels controlled by the NGVCP (up to 32), the PCM clock frequency (maximum 8.192 MHz),
usage assumptions, and the choice of line test time slot management will dictate the number of PCM highways that
are required. The NGVCP supports one or two PCM highways.
2.2
Line test restrictions at the device level are:
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2.3
Table 7
which configuration topology the algorithms can be used with and in which software package they’re available.
Many of these tests will be used for GR-844 testing. A subset of these will be used for GR-909 testing. These tests
are detailed in
Four regular transmission tests: 8 time slots.
One 15-kHz test plus three regular transmission tests: 14 time slots.
Two 15-kHz test plus two regular transmission tests: 20 time slots.
Put all channels contiguous, one after each other, and allocate 20 time slots for line testing. Always re-
allocate the channel time slot before executing any test requiring PCM access. Or,
Skip every second channel, leaving an empty time slot between each time slot in use, and allocate 16 time
slots to line testing. Only re-allocate the channel time slot before executing a 15-kHz noise test. Regular
transmission tests do not require a time slot re-allocation.
Up to 4 lines in line testing simultaneously running per NGVCP.
Of the 4 lines in line testing simultaneously running per NGVCP, there is a limit of two simultaneous 15-kHz
noise tests per NGVCP.
Up to 2 lines in line testing simultaneously running per SLAC.
Of the 2 lines in line testing simultaneously running per SLAC, only one of these tests may be the 15-kHz
noise test.
Time Slot Requirements
Device Level Test Restrictions
Line Test Packages
Line Testing
provides a complete list of the supported line test algorithms and their library names. The table also shows
Table
8.
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Le79234-SW
15
Data Sheet