
Advance Information
MT9072
139
Bit
Name
Functional Description
15
D4YALMIM
(0)
D4 Yellow Interrupt Mask.
When unmasked this interrupt bit goes high whenever the D4
Yellow alarm code has been received. If 1 - masked, 0 - unmasked.
14
D4Y48IM
(0)
D4 Y48 Interrupt Mask.
When unmasked this interrupt bit goes high whenever the D4
Yellow alarm code has been received for 48 msec. If 1 - masked, 0 - unmasked.
13
SECYELIM
(0)
Secondary Yellow Interrupt Mask.
When unmasked this interrupt bit goes high
whenever a Secondary Yellow alarm is received. If 1 - masked, 0 - unmasked.
12
ESFYELIM
(0)
ESF Yellow Interrupt Mask.
When unmasked this interrupt bit goes high whenever a
ESF Yellow alarm is received. If 1 - masked, 0 - unmasked.
11
T1DMYIM
(0)
T1DM Yellow Interrupt Mask.
When unmasked this interrupt bit goes high whenever a
TIDM Yellow alarm is received. If 1 - masked, 0 - unmasked.
10
#
not used
9
BPVIM
(0)
Bipolar Violation Interrupt Mask.
When unmasked this interrupt bit goes high whenever
a bipolar violation (excluding B8ZS encoding) is encountered. If 1 - masked, 0 -
unmasked.
8
PRBSIM
(0)
Pseudo Random Bit Sequence Error Interrupt Mask.
When unmasked this interrupt bit
goes high upon detection of an error with a channel selected for PRBS testing. If 1 -
masked, 0 - unmasked.
7
PDVIM
(0)
Pulse Density Violation Interrupt Mask.
When unmasked this interrupt bit goes high
whenever a sequence of 16 consecutive zeros is received on the line, or the incoming
pulse density is less than N ones in a time frame of 8(N+1) where N = 1 to 23. If 1 -
masked, 0 - unmasked.
6
LLEDIM
(0)
Loop Code Enable Detected Interrupt Mask.
When unmasked this interrupt bit goes
high whenever the loop up code has been detected on the line for a period of 48
milliseconds. If 1 - masked, 0 - unmasked.
5
LLDDIM
(0)
Loop Code Disable Detected Interrupt Mask.
When unmasked this interrupt bit goes
high whenever the loop down code has been detected on the line for a period of 48
milliseconds. If 1 - masked, 0 - unmasked.
Table 110 - Receive Line and Timer Interrupt Mask Register(Y45) (T1)
Bit
Name
Functional Description
15-4
#
not used.
3
EXZOI
(0)
Excessive Zero Overflow Interrupt.
This bit goes high whenever the excessive zero
counter (Y1B) overflows.This bit is reset after a read of Y36 or Y26.
2
EXZI
(0)
EXcessive Zero Interrupt.
This bit goes high whenever the excessive zero counter (Y1B)
is incremeted by one. This bit is reset after a read of Y36 or Y26.
1
TXSLIPIM
(0)
Transmit SLIP Interrupt Mask
. When unmasked an interrupt is initiated whenever a
controlled frame slip occurs in the transmit elastic buffer. If 1 - masked, 0 - unmasked.
0
RXSLIPIM
(0)
Receive SLIP Interrupt Mask.
When unmasked an interrupt is initiated whenever a
controlled frame slip occurs in the receive elastic buffer. If 1 - masked, 0 - unmasked.
Table 111 - Elastic Store and Excessive zero Interrupt Mask Register(Y46) (T1)