
DS3171/DS3172/DS3173/DS3174
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Register Name:
Register Description:
Register Address:
Bit #
Name
Bit #
Name
T3.RSR1
T3 Receive Status Register #1
(1,3,5,7)24h
15
14
13
--
12
11
10
AIC
9
8
Reserved
Reserved
Reserved
T3FM
IDLE
RUA1
7
6
5
--
4
3
2
1
0
OOMF
SEF
LOF
RDI
AIS
OOF
LOS
Bit 11: T3 Framing Format Mismatch
(T3FM)
– This bit indicates the DS3 framer is programmed for a framing
format (C-bit or M23) that is different than the format indicated by the incoming DS3 signal.
Bit 10: Application Identification Channel
(AIC)
– This bit indicates the current state of the Application
Identification Channel (AIC) from the C
11
bit. AIC = 1 is C-bit mode, AIC = 0 is M23 mode.
Bit 9: DS3 Idle Signal (IDLE)
– When 0, the receive frame processor is not in a
DS3
idle signal (Idle) condition.
When 1, the receive frame processor is in an Idle condition.
Bit 8: Receive Unframed All 1’s (RUA1)
– When 0, the receive frame processor is not in a receive unframed all
1’s (RUA1) condition. When 1, the receive frame processor is in an RUA1 condition.
Bit 7: Out Of Multi-frame
(OOMF)
– When 0, the receive frame processor is not in an out of multi-frame (OOMF)
condition. When 1, the receive frame processor is in an OOMF condition.
Bit 6: Severely Errored Frame
(SEF)
– When 0, the receive frame processor is not in a severely errored frame
(SEF) condition. When 1, the receive frame processor is in an SEF condition.
Bit 4: Loss Of Frame (LOF)
– When 0, the receive framer is not in a loss of frame (LOF) condition. When 1, the
receive frame processor is in an LOF condition.
Bit 3: Remote Defect Indication (RDI)
– This bit indicates the current state of the remote defect indication (RDI)
Bit 2: Alarm Indication Signal (AIS)
– When 0, the receive frame processor is not in an alarm indication signal
(AIS) condition. When 1, the receive frame processor is in an AIS condition.
Bit 1: Out Of Frame
(OOF)
– When 0, the receive framer is not in an out of frame (OOF) condition. When 1, the
receive frame processor is in an OOF condition.
Bit 0: Loss Of Signal (LOS)
– When 0, the receive framer is not in a loss of signal (LOS) condition. When 1, the
receive framer is in an LOS condition.
Register Name:
Register Description:
Register Address:
Bit #
Name
Bit #
Name
T3.RSR2
T3 Receive Status Register #2
(1,3,5,7)26h
15
--
14
--
13
--
12
--
11
--
10
--
9
--
8
--
7
--
6
--
5
--
4
--
3
2
1
0
CPEC
FBEC
PEC
FEC
Bit 3: C-bit Parity Error Count (CPEC)
– When 0, the C-bit parity error count is zero. When 1, the C-bit parity
error count is one or more. This bit is set to zero in M23 DS3 mode.
Bit 2: Remote Error Indication Count (FBEC)
– When 0, the remote error indication count is zero. When 1, the
remote error indication count is one or more. This bit is set to zero in M23 DS3 mode.
Bit 1: P-bit Parity Error Count (PEC)
– When 0, the P-bit parity error count is zero. When 1, the P-bit parity error
count is one or more.