
PRELIMINARY
XRT86SH328
269
REV. P1.0.6
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
N
OTE
:
This bit-field only applies if the channel has been configured to operate in the T1-ESF Framing format.
BIT [3:2] - Transmit D/E Time Source Select[1:0]:
These two READ/WRITE bit-fields are used to specify the source of the data that is to be transported via the
D/E time-slots within the outbound Transmit DS1 Data-stream.
N
OTE
:
These two register bits are only active if the user has configured one of the Time-Slots (within the outbound
DS1 data-stream) to function as the D/E Channel.
BIT [1:0] - Transmit Data Link Source Select[1:0]:
These two READ/WRITE bit-fields are used to specify the source for the data that will be transported via the Data Link
bits, within the outbound DS1 data-stream.
10
Data Link Bandwidth = 2kHz (Frames 3, 7, 11,…)Data Link Messages are being trans-
ported via every other DL bit-field within the outbound DS1 data-stream.
11
Do not use
The Relationship between Transmit D/E Time Source Select[1:0] and the resulting source of the D/E-
Time-Slot data within the outbound DS1 data-stream
T
RANSMIT
D/E T
IME
S
OURCE
S
ELECT
[1:0]
S
OURCE
FOR
T
RANSMIT
D/E T
IME
-S
LOT
D
ATA
00
Upstream Circuitry (for Aggregation Applications) or the TxDS1DATA_n input (for
28-Channel DS1 Framer/LIU Combo Mode applications).
01
The Transmit LAPD Controller Block
10
Reserved - Do NOT Use
11
The Relationship between Transmit Data Link Source Select[1:0] and the Resulting source of the
data (which is to be transported via the Data Link bits, within the outbound DS1 data-stream)
T
RANSMIT
D
ATA
L
INK
S
OURCE
S
ELECT
[1:0]
R
ESULTING
S
OURCE
OF
D
ATA
L
INK
D
ATA
00
Transmit LAPD Controller Block (within the Transmit DS1 Framer block)
01
Upstream Circuitry (for Aggregation Applications) or the TxDS1DATA_n input (for
28-Channel DS1 Framer/LIU Combo Mode Applications)
10
Reserved
11
Data Link Bits are each Forced to 1.
The Relationship between Transmit Data Link Bandwidth[1:0] and the resulting Bits/Bandwidth
available for the transport of Data Link Messages within the outbound DS1 data-stream
T
RANSMIT
D
ATA
L
INK
B
ANDWIDTH
[1:0]
R
ESULTING
B
ANDWIDTH
AVAILABLE
TO
TRANSPORT
D
ATA
L
INK
M
ESSAGES
WITHIN
OUTBOUND
DS1
DATA
-
STREAM