
Preliminary Information
MT9071
177
7
6
5
4
3
2
1
0
SanT1
SanT3
SanT5
SanT7
SanT9
SanT11
SanT13
SanT15
(0000 0000)
YB0
Sa4T1
Sa4T3
Sa4T5
Sa4T7
Sa4T9
Sa4T11
Sa4T13
Sa4T15
YB1
Sa5T1
Sa5T3
Sa5T5
Sa5T7
Sa5T9
Sa5T11
Sa5T13
Sa5T15
YB2
Sa6T1
Sa6T3
Sa6T5
Sa6T7
Sa6T9
Sa6T11
Sa6T13
Sa6T15
YB3
Sa7T1
Sa7T3
Sa7T5
Sa7T7
Sa7T9
Sa7T11
Sa7T13
Sa7T15
YB4
Sa8T1
Sa8T3
Sa8T5
Sa8T7
Sa8T9
Sa8T11
Sa8T13
Sa8T15
NFAS Frame #
1
3
5
7
9
11
13
15
There are 5 transmit national bits data registers in total, one 8-bit register for each Sa bit (Sa8-Sa4). Each register contains one byte
(8-bits) of data corresponding to eight frames of a particular bit position in timeslot 0. There are 5 registers in total containing 5 bytes
of data, occupying addresses YB0 to YB4. Address YB0 corresponds to bit position 4 (Sa4) and address YB4 corresponding to bit
position 8 (Sa8).
Table 168 - E1 Transmit National Bits Sa4 - Sa8 Data Registers - R/W Address YB0-YB4
Bit
Name
Functional Description
15-8 (#### ####) Not Used
Receive National Bit SanTm (n = 4 to 8, m = 1, 3, 5 etc. to 15).
This bit is received from the
PCM30 link, in bit position n of Timeslot 0 during Frame m of NFAS frames when CRC-4
multiframe alignment is used, or of consecutive odd frames when CRC-4 multiframe
alignment is not used. Bit SanTm is sourced from register address YCn as follows.
YC0
YC1
YC2
YC3
Sa4R1
Sa5R1
Sa6R1
Sa7R1
Sa4R3
Sa5R3
Sa6R3
Sa7R3
Sa4R5
Sa5R5
Sa6R5
Sa7R5
Sa4R7
Sa5R7
Sa6R7
Sa7R7
Sa4R9
Sa5R9
Sa6R9
Sa7R9
Sa4R11
Sa5R11
Sa6R11
Sa7R11
Sa4R13
Sa5R13
Sa6R13
Sa7R13
Sa4R15
Sa5R15
Sa6R15
Sa7R15
7
6
5
4
3
2
1
0
SanR1
SanR3
SanR5
SanR7
SanR9
SanR11
SanR13
SanR15
(0000 0000)
YC4
Sa8R1
Sa8R3
Sa8R5
Sa8R7
Sa8R9
Sa8R11
Sa8R13
Sa8R15
NFAS Frame #
1
3
5
7
9
11
13
15
There are 5 receive national bits data registers in total, one 8-bit register for each Sa bit (Sa8-Sa4). Each register contains one byte
(8-bits) of data corresponding to eight frames of a particular bit position in timeslot 0. There are 5 registers in total containing 5 bytes
of data, occupying addresses YC0 to YC4. Address YC0 corresponds to bit position 4 (Sa4) and address YC4 corresponding to bit
position 8 (Sa8).
Table 169 - E1 Receive National Bit Sa4 - Sa8 Data Registers - R Address YC0-YC4
Bit
Name
Functional Description
15
LLOS
LIU Loss of Signal indication
.
In T1 mode, this bit will be high when the received analog AMI signal is less than 40 dB below the
nominal value for a period of at least 1 msec. This bit will be low for normal operation.
In E1 mode, this bit will be high when the received analog AMI signal is below the threshold
selected by the control register bit ELOS described in Table 173 - T1 & E1 LIU Control - R/W
Address YE3, for a period of at least 1 ms. This bit will be low for normal operation.
Table 170 - T1 & E1 LIU and JA Status - R Address YE0
Bit
Name
Functional Description