
PRELIMINARY
XRT86SH328
199
REV. P1.0.6
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
This READ-ONLY bit-field indicates whether or not the Receive LAPD Controller block is currently receiving the Flag
Sequence (e.g., a continuous stream of 0x7E octets within the Data Link channel).
`
0 - Indicates that the Receive LAPD Controller block is NOT currently receiving the Flag Sequence octet within the
incoming Data Link channel.
`
1 - Indicates that the Receive LAPD Controller block is currently receiving a continuous stream of Flag Sequence
octets within the incoming Data Link channel.
BIT7, 5 - Reserved
BIT 4 - Set G.747 Mode
This READ/WRITE bit-field is used to configure the M12 MUX and De-MUX (associated with DS2 Channel # 1) to
operate in either the DS2 or the G.747 Mode. If the user configures the M12 MUX and De-MUX to operate in the DS2
Mode, then all of the following will be true.
The M12 MUX will multiplex four (4) DS1 signals into a DS2 signal, prior to routing it to the M23 MUX.
The M12 De-MUX will accept a DS2 data-stream (from the M23 De-MUX) and it will de-multiplex this data-
stream into four (4) DS1 signals (prior to being output to the Egress Direction Receive DS1/E1 Framer block).
Likewise, if the user configures the M12 MUX and De-MUX to operate in the G.747 Mode, then all of the following will
be true.
The M12 MUX will multiplex three (3) E1 signals into a G.747 data-stream, prior to routing it to the M23 MUX
The M12 De-MUX will accept a G.747 data-stream (from the M23 De-MUX) and it will de-multiplex this data-
stream into three (3) E1 signals (prior to being output to the Egress Direction Receive DS1/E1 Framer block).
`
0 - Configures the M12 MUX (associated with DS2 Channel # 1) to operate in the DS2 Mode.
`
1 - Configures the M12 MUX (associated with DS2 Channel # 1) to operate in the G.747 Mode.
BIT 3 - Set G.747 Reserved Bit
This READ/WRITE bit-field is used to configure M12 MUX to set the Reserved bit (within a G.747 data-stream) to either
a 0 or 1.
`
0 - Configures the M12 MUX to set the G.747 Reserved bit (within the outbound G.747 data-stream) to 0.
`
1 - Configures the M12 MUX to set the G.747 Reserved bit (within the outbound G.747 data-stream) to 1.
N
OTE
:
This bit-field is only active if the M12 MUX/De-MUX has been configured to operate in the G.747 Mode.
BIT 2 - Set M12 FERF Bit Value
Bits 1, 0 - M12 Loop-back Code[1:0]:
These READ/WRITE bit-fields are used to specify the coding (or the values that the M12 MUX block will set the C-bits,
within its outbound DS2 data-stream to) in order to request that the remote terminal equipment operate in the remote
DS1 Loop-back Mode.
T
ABLE
258: DS3 F
RAMER
B
LOCK
- M12 C
ONFIGURATION
R
EGISTER
- DS2 C
HANNEL
# 1 (A
DDRESS
= 0
X
0E1A)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Reserved
Set G.747
Mode
Set G.747
Reserved Bit
M12 FERF
Bit Setting
M12 Loop-back Code[1:0]
R/O
R/O
R/O
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0