
MT9071
Preliminary Information
134
4
CALN
CRC-4 Alignment 2ms Timer.
When CRC-4 multiframe alignment has not been achieved
(CSYNC=1, see Table 105 - E1 Synchronization & CRC-4 Remote Status - R Address Y10),
this bit asynchronously changes state every 2 ms. When CRC-4 multiframe alignment has
been achieved (CSYNC =0), this bit still changes state every 2 ms, but is synchronous with
the receive CRC-4 multiframe signal.
CRC-4 Reframe.
If one, indicates the received PCM30 link CRC-4 multiframe synchronization
(CSYNC=1, see Table 105 - E1 Synchronization & CRC-4 Remote Status - R Address Y10)
could not be found within the time out period of 8ms after detecting basic frame
synchronization (BSYNC=0, see Table 105 - E1 Synchronization & CRC-4 Remote Status - R
Address Y10). This bit is cleared (zero) when CRC-4 multiframe synchronization is acquired
(CSYNC =0).
Receive CRC-4 Error Status One.
If one, the CRC-4 evaluation of the last received PCM30
link submultiframe 1 resulted in an error (the calculated C1,C2,C3,C4 CRC-4 remainder bits
did not match the received CRC-4 remainder C1,C2,C3,C4 bits). If zero, the last
submultiframe 1 was error free. Updated on a submultiframe 1 basis.
Receive CRC-4 Error Status Two.
If one, the CRC-4 evaluation of the last received PCM30
link submultiframe 2 resulted in an error (the calculated C1,C2,C3,C4 CRC-4 remainder bits
did not match the received CRC-4 remainder C1,C2,C3,C4 bits). If zero, the last
submultiframe 2 was error free. Updated on a submultiframe 2 basis.
Not Used
Table 107 - E1 CRC-4 Timers & CRC-4 Local Status - R Address Y11
3
CRCRF
2
CRCS1
1
CRCS2
0
(#)
Bit
Name
Functional Description
15-10
9
(#### ##)
RXBOM
(0)
RXBOMM
(0)
Not Used
Receive Bit Oriented Message (BOM) Received.
This bit is set when a BOM byte
RXBOM7-0 (of this register) is received.
Receive Bit Oriented (BOM) Match.
This bit is set if there is a match between the
received BOM byte RXBOM7-0 (of this register) and the BOM match register byte
RXBOMM7-0 (see Table 94 - T1 Receive BOM Match Control - R/W Address Y08).
Receive Bit Oriented Message (BOM).
This is the received BOM. This register is
updated after 7 out of 10 identical messages are received.
8
7
6
5
4
3
2
1
0
RXBOM7
RXBOM6
RXBOM5
RXBOM4
RXBOM3
RXBOM2
RXBOM1
RXBOM0
(#### ####)
Table 108 - T1 Receive Bit Oriented Message - R Address Y12
Bit
Name
Functional Description