TFRA08C13-DB AGERE [Agere Systems], TFRA08C13-DB Datasheet - Page 129

• Manufacturer Part Number: TFRA08C13-DB
• Description: TFRA08C13 OCTAL T1/E1 Framer
• Manufacturer: AGERE [Agere Systems]

Preliminary Data Sheet
October 2000
Lucent Technologies Inc.
Lucent Technologies Inc.
Framer Register Architecture
Facility Alarm Condition Register (FRM_SR1)
The bits in the facility alarm condition register (FRM_SR1) indicate alarm state of the receive framer section. Inter-
rupts from this register are generated once at the onset of the alarm condition. If the alarm condition is still present
at the time of the read, the bit will remain in the 1 state for the duration of the alarm condition. If the alarm condition
is no longer present at the time of the read, then the bit is cleared on read.
Table 70. Facility Alarm Condition Register (FRM_SR1) (Y01)
Bit
0
1
2
3
4
5
6
7
LTS16MFA
RTS16AIS
LTS0MFA
Symbol
LFALR
LTSFA
AUXP
LSFA
LBFA
LFA
AIS
Loss of Frame Alignment. A 1 indicates the receive framer is in a loss of frame align-
ment and is currently searching for a new alignment.
Loss of Signaling Superframe Alignment. A 1 indicates the receive framer is in a loss
of signaling superframe alignment in the DS1 framing formats. A search for a new sig-
naling superframe alignment starts once frame alignment is established.
Loss of Time Slot 16 Signaling Multiframe Alignment. A 1 indicates the receive framer is
in a loss of time slot 16 signaling multiframe alignment in the CEPT mode. A search for a
new time slot 16 signaling multiframe alignment starts once frame alignment is estab-
lished. This bit is 0 when the TFRA08C13 is programmed for the transparent signaling
mode, register FRM_PR44 bit 0 (TSIG) = 1.
Loss of Transmit Superframe Alignment. A 1 indicates superframe alignment pattern
in the transmit facility data link as defined for SLC -96 is lost. Only valid for SLC -96 mode.
This bit is 0 in all other DS1 modes.
Loss of Time Slot 0 CRC-4 Multiframe Alignment. A 1 indicates an absence of CRC-4
multiframe alignment after initial basic frame alignment is established. A 0 indicates
either CRC-4 checking is disabled or CRC-4 multiframe alignment has been success-
fully detected.
Loss of Frame Alignment Since Last Read. A 1 indicates that the LFA state indicated
in bit 0 of this register is the same LFA state as the previous read.
Loss of Biframe Alignment. A 1 indicates that the CEPT biframe alignment pattern
(alternating 10 in bit 2 of time slot 0 of each frame) in the receive system data is errored.
This alignment pattern is required when transmitting the Si or Sa bits transparently. Only
valid in the CEPT mode. This bit is 0 in all other modes.
Receive Time Slot 16 Alarm Indication Signal. A 1 indicates the receive framer
detected time slot 16 AIS in the CEPT mode. This bit is 0 in the DS1 modes.
Auxiliary Pattern. A 1 indicates the detection of a valid AUXP (unframed 1010 . . . pat-
tern) in the CEPT mode. This bit is 0 in the DS1 modes.
Alarm Indication Signal. A 1 indicates the receive framer is currently receiving an AIS
pattern from its remote line end.
(continued)
Description
TFRA08C13 OCTAL T1/E1 Framer
129