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Preliminary Information
MT9076
65
Bit
Name
Functional Description
7
TFSYNIM
Terminal Frame Synchronization Interrupt Mask
. When unmasked an interrupt is initiated
whenever a change of state of loss of terminal frame synchronization condition exists. If 1 -
unmasked, 0 - masked.
6
MFSYNIM
Multiframe Synchronization Interrupt Mask
. When unmasked an interrupt is initiated
whenever a change of state of loss of multiframe synchronization condition exist. If 1 -
unmasked, 0 - masked
5
BIOMTIM
Bit Oriented Message Transition Interrupt Mask
. When unmasked an interrupt is initiated
whenever a new BIOM arrives or if the current BIOM stops transmission. If 1 - unmasked, 0 -
masked.
4
AISIM
Alarm Indication Signal Interrupt Mask.
When unmasked a change of state of received all
ones condition will initiate an interrupt. If 1 - unmasked, 0 - masked.
3
LOSIM
Loss of Signal Interrupt Mask
. When unmasked an interrupt is initiated whenever a change of
state of a loss of signal condition exists. If 1 - unmasked, 0 - masked.
2
SEFIM
Severely Errored Frame Interrupt Mask
. When unmasked an interrupt is initiated when a
sequence of 2 framing errors out of 6 occurs. If 1 - unmasked, 0 - masked.
1
TxSLPIM
Transmit SLIP Interrupt Mask.
When unmasked an interrupt is initiated whenever a controlled
frame slip occurs in the transmit elastic buffer. If 1 - unmasked, 0 - masked.
0
RxSLPIM
Receive SLIP Interrupt Mask
. When unmasked an interrupt is initiated whenever a controlled
frame slip occurs in the receive elastic buffer. If 1 - unmasked, 0 - masked.
Table 31 - Interrupt Mask Word Zero (T1)
(Page 1, Address 1BH)
Bit
Name
Functional Description
7
FEIM
Framing Bit Error Interrupt Mask
. When unmasked an interrupt is initiated whenever an
erroneous framing bit is detected (provided the circuit is in terminal frame sync). If 1 - unmasked,
0 - masked.
6
CRCIM
CRC-6 Error Interrupt Mask
. When unmasked an interrupt is initiated whenever a local CRC-6
error occurs. If 1 - unmasked, 0 - masked.
5
YELIM
Yellow Alarm Interrupt Mask
. When unmasked detection of a yellow alarm triggers an interrupt.
If 1 - unmasked, 0 - masked.
4
COFAIM
Change of Frame Alignment Interrupt Mask
. When unmasked an interrupt is initiated whenever
a change of frame alignment occurs after a reframe. If 1 - unmasked, 0 - masked.
3
LCVIM
Line Code Violation Interrupt Mask
. When unmasked an interrupt is initiated whenever a line
code violation (excluding B8ZS bipolar violations encoding) is encountered. If 1- unmasked, 0 -
masked.
2
PRBSIM
Pseudo Random Bit Sequence Error Interrupt Mask
. When unmasked an interrupt will be
generated upon detection of an error with a channel selected for PRBS testing. If 1 - unmasked, 0
- masked.
1
PDVIM
Pulse Density Violation Interrupt Mask
. When unmasked an interrupt is triggered whenever a
sequence excess consecutive zeros is received on the line. If 1 - unmasked, 0 - masked.
0
- - -
Unused
.
Table 32 - Interrupt Mask Word One (T1)
(Page 1, Address 1CH)