
XRT86L30
SINGLE T1/E1/J1 FRAMER/LIU COMBO
REV. P1.0.1
PRELIMINARY
51
T
ABLE
22: F
RAMING
C
ONTROL
R
EGISTER
E1 M
ODE
R
EGISTER
11 -- E1 M
ODE
F
RAMING
C
ONTROL
R
EGISTER
(FCR) H
EX
A
DDRESS
: 0
X
010B
B
IT
F
UNCTION
T
YPE
D
EFAULT
D
ESCRIPTION
-O
PERATION
7
RSYNC
R/W
0
Force Re-Synchronization
A 0 to 1 transition in this bit-field forces the Receive E1 Framer to restart the
synchronization process. This bit field is automatically cleared (set to 0) after
frame synchronization is reached.
6
CASC(1)
R/W
0
Loss of CAS Multiframe Alignment Criteria Select
These two Read/Write bits are used to select the Loss of CAS Multi-frame Align-
ment Declaration criteria. The relationship between the state of these two bit
fields and the corresponding Loss of CAS Multi-Frame is presented below.
00 = Two consecutive CAS Multi-Frames with Multiframe Alignment Signal
(MAS) errors
01 = Three consecutive CAS Multi-Frames with MAS errors
10 = Four consecutive CAS Multi-Frames with MAS errors
11 = Eight consecutive CAS Multi-Frames with MAS errors
N
OTE
:
These bits are only active if Channel Associated Signaling is used.
5
CASC(0)
R/W
0
4
CRCC(1)
R/W
0
Loss of CRC-4 Multiframe Alignment Criteria Select
Selects criteria for Loss of CRC-4 Multiframe Alignment.
00 = Four consecutive CRC Multiframe Alignment signals have been received in
error
01 = Two consecutive CRC Multiframe Alignment signals have been received in
error
10 = Eight consecutive CRC Multiframe Alignment signals have been received
in error
11 = 915 or more CRC-4 errors have been detected in one second.
N
OTE
:
These bit-fields are ignored if CRC Multiframe Alignment has been dis-
abled.
3
CRCC(0)
R/W
0
2
FASC(2)
R/W
0
Loss of FAS Alignment Criteria Select
These three Read/Write bits are used to select Loss of FAS Frame Declaration
criteria. The relationship between the state of these bits and the corresponding
Loss of FAS Frame declaration is presented below.
000 = Illegal - do not use
001 = 1 errored FAS pattern
010 = 2 consecutive errored FAS patterns
011 = 3 consecutive errored FAS patterns
100 = 4 consecutive errored FAS patterns
101 = 5 consecutive errored FAS patterns
110 = 6 consecutive errored FAS patterns
111 = 7 consecutive errored FAS patterns
1
FASC(1)
R/W
1
0
FASC(0)
R/W
1