
XRT84L38
IX
REV. 1.0.1
OCTAL T1/E1/J1 FRAMER
F
IGURE
108. E1 T
RANSMIT
O
VERHEAD
I
NPUT
I
NTERFACE
T
IMING
................................................................................................. 313
8.2 E1 RECEIVE OVERHEAD INTERFACE ......................................................................................................... 313
8.2.1 DESCRIPTION OF THE E1 RECEIVE OVERHEAD OUTPUT INTERFACE BLOCK ............................................... 313
F
IGURE
109. B
LOCK
D
IAGRAM
OF
THE
E1 R
ECEIVE
O
VERHEAD
O
UTPUT
I
NTERFACE
OF
XRT84L38.............................................. 314
8.2.2 CONFIGURE THE E1 RECEIVE OVERHEAD OUTPUT INTERFACE MODULE AS SOURCE OF THE NATIONAL BIT
SEQUENCE IN E1 FRAMING FORMAT MODE.......................................................................................................... 314
R
ECEIVE
S
IGNALING
AND
D
ATA
L
INK
S
ELECT
R
EGISTER
(RSDLSR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
0CH) 314
F
IGURE
110. E1 R
ECEIVE
O
VERHEAD
O
UTPUT
I
NTERFACE
T
IMING
................................................................................................ 315
9.0 DS1 TRANSMIT FRAMER BLOCK..................................................................................................... 316
9.1 HOW TO CONFIGURE XRT84L38 TO OPERATE IN DS1 MODE................................................................. 316
C
LOCK
S
ELECT
R
EGISTER
(CSR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
00H)................................................. 316
F
RAMING
S
ELECT
R
EGISTER
(FSR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
07H).............................................. 316
9.2 HOW TO CONFIGURE THE FRAMER TO TRANSMIT DATA IN VARIOUS DS1 FRAMING FORMATS .... 317
F
RAMING
S
ELECT
R
EGISTER
(FSR) (IN
DIRECT
A
DDRESS
= 0
XN
0H, 0
X
07H) .............................................. 317
9.2.1 HOW TO CONFIGURE THE FRAMER TO INPUT FRAMING ALIGNMENT BITS FROM DIFFERENT SOURCES 317
S
YNCHRONIZATION
MUX R
EGISTER
(SMR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
09H)................................... 318
9.2.2 HOW TO CONFIGURE THE FRAMER TO INPUT CRC-6 BITS FROM DIFFERENT SOURCES ............................ 318
S
YNCHRONIZATION
MUX R
EGISTER
(SMR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
09H)................................... 319
9.3 HOW TO CONFIGURE THE FRAMER TO APPLY DATA AND SIGNALING CONDITIONING TO DS1 PAYLOAD
DATA ON A PER-CHANNEL BASIS............................................................................................................ 319
T
RANSMIT
C
HANNEL
C
ONTROL
R
EGISTER
(TCCR) (I
NDIRECT
A
DDRESS
= 0
XN
2H, 0
X
00H - 0
X
1FH) .......... 320
9.3.1 HOW TO APPLY USER IDLE CODE TO THE DS1 PAYLOAD DATA...................................................................... 320
U
SER
IDLE C
ODE
R
EGISTER
(UCR) (I
NDIRECT
A
DDRESS
= 0
XN
02H, 0
X
20H - 0
X
37H) ............................ 321
9.4 HOW TO CONFIGURE THE XRT84L38 FRAMER TO APPLY ZERO CODE SUPPRESSION TO DS1 PAYLOAD
DATA ON A PER-CHANNEL BASIS............................................................................................................ 321
T
RANSMIT
C
HANNEL
C
ONTROL
R
EGISTER
(TCCR) (I
NDIRECT
A
DDRESS
= 0
XN
2H, 0
X
00H - 0
X
1FH) ......... 321
9.5 HOW TO CONFIGURE THE XRT84L38 FRAMER TO TRANSMIT ROBBED-BIT SIGNALING INFORMATION
321
9.5.1 BRIEF DISCUSSION OF ROBBED-BIT SIGNALING IN DS1 FRAMING FORMAT ................................................. 322
9.5.2 CONFIGURE THE FRAMER TO TRANSMIT ROBBED-BIT SIGNALING................................................................. 323
9.5.2.1 I
NSERT
S
IGNALING
B
ITS
FROM
TSCR R
EGISTER
................................................................................................. 323
T
RANSMIT
S
IGNALING
C
ONTROL
R
EGISTER
(TSCR) (I
NDIRECT
A
DDRESS
= 0
XN
2H, 0
X
40H - 0
X
57H)........ 324
9.5.2.2 I
NSERT
S
IGNALING
B
ITS
FROM
T
X
S
IG
_
N
P
IN
....................................................................................................... 324
F
IGURE
111. T
IMING
D
IAGRAM
OF
THE
T
X
S
IG
_
N
I
NPUT
................................................................................................................. 324
T
RANSMIT
I
NTERFACE
C
ONTROL
R
EGISTER
(TICR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
20H)........................ 325
9.5.2.3 I
NSERT
S
IGNALING
D
ATA
FROM
T
X
S
ER
_
N
P
IN
..................................................................................................... 325
9.5.2.4 E
NABLE
R
OBBED
-
BIT
S
IGNALING
AND
S
IGNALING
D
ATA
S
OURCE
C
ONTROL
........................................................ 325
T
RANSMIT
S
IGNALING
C
ONTROL
R
EGISTER
(TSCR) (I
NDIRECT
A
DDRESS
= 0
XN
2H, 0
X
40H - 0
X
57H)........ 325
T
RANSMIT
S
IGNALING
C
ONTROL
R
EGISTER
(TSCR) (I
NDIRECT
A
DDRESS
= 0
XN
2H, 0
X
40H - 0
X
57H)........ 326
9.6 HOW TO CONFIGURE THE XRT84L38 FRAMER TO GENERATE AND TRANSMIT ALARMS AND ERROR IN-
DICATIONS TO REMOTE TERMINAL......................................................................................................... 326
9.6.1 BRIEF DISCUSSION OF ALARMS AND ERROR CONDITIONS.............................................................................. 326
F
IGURE
112. S
IMPLE
D
IAGRAM
OF
DS1 S
YSTEM
M
ODEL
.............................................................................................................. 327
F
IGURE
113. G
ENERATION
OF
Y
ELLOW
A
LARM
BY
THE
CPE
UPON
DETECTION
OF
LINE
FAILURE
..................................................... 328
F
IGURE
114. G
ENERATION
OF
AIS
BY
THE
R
EPEATER
UPON
DETECTION
OF
Y
ELLOW
A
LARM
ORIGINATED
BY
THE
CPE................... 329
F
IGURE
115. G
ENERATION
OF
Y
ELLOW
A
LARM
BY
THE
CPE
UPON
DETECTION
OF
AIS
ORIGINATED
BY
THE
R
EPEATER
................... 330
9.6.2 HOW TO CONFIGURE THE FRAMER TO TRANSMIT AIS ...................................................................................... 330
A
LARM
G
ENERATION
R
EGISTER
(AGR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
08H).......................................... 331
9.6.3 HOW TO CONFIGURE THE FRAMER TO GENERATE RED ALARM ..................................................................... 331
A
LARM
G
ENERATION
R
EGISTER
(AGR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
08H).......................................... 331
9.6.4 HOW TO CONFIGURE THE FRAMER TO TRANSMIT YELLOW ALARM............................................................... 331
9.6.4.1 T
RANSMIT
Y
ELLOW
A
LARM
IN
SF M
ODE
............................................................................................................. 331
9.6.4.2 T
RANSMIT
Y
ELLOW
A
LARM
IN
ESF M
ODE
........................................................................................................... 332
9.6.4.3 T
RANSMIT
Y
ELLOW
A
LARM
IN
N M
ODE
............................................................................................................... 332
9.6.4.4 T
RANSMIT
Y
ELLOW
A
LARM
IN
T1DM M
ODE
........................................................................................................ 332
A
LARM
G
ENERATION
R
EGISTER
(AGR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
08H).......................................... 333
10.0 DS1 RECEIVE FRAMER BLOCK...................................................................................................... 334
10.1 HOW TO CONFIGURE XRT84L38 TO OPERATE IN DS1 MODE............................................................... 334
C
LOCK
S
ELECT
R
EGISTER
(CSR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
00H)................................................. 334
F
RAMING
S
ELECT
R
EGISTER
(FSR) (I
NDIRECT
A
DDRESS
= 0
XN
0H, 0
X
07H).............................................. 334
10.2 HOW TO CONFIGURE THE FRAMER TO RECEIVE DATA IN VARIOUS DS1 FRAMING FORMATS..... 335