XRT84L38IB Exar Corporation, XRT84L38IB Datasheet - Page 293

• Manufacturer Part Number: XRT84L38IB
• Description: Network Controller & Processor ICs 8 Ch T1/E1 Framer
• Manufacturer: Exar Corporation

Specifications of XRT84L38IB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REV. 1.0.1
SEVENTH OCTET OF 16.384MBIT/S DATA STREAM
X
SECOND OCTET OF 16.384MBIT/S DATA STREAM
FOURTH OCTET OF 16.384MBIT/S DATA STREAM
SIXTH OCTET OF 16.384MBIT/S DATA STREAM
EIGHTH OCTET OF 16.384MBIT/S DATA STREAM
X
A
2. The local Terminal Equipment also multiplexed signaling bits with payload bits and sent them together
Y
Y
Y
: The signaling bit A of Channel Y
: The Xth payload bit of Channel Y
: The Xth payload bit of Channel Y
through the 16.384Mbit/s data stream.
When the Terminal Equipment is sending the fifth payload bit of a particular channel, instead of sending it
twice, it inserts the signaling bit A of that particular channel. Similarly, the sixth payload bit of a particular
channels is followed by the signaling bit B of that channel; the seventh payload bit is followed by the
signaling bit C; the eighth payload bit is followed by the signaling bit D.
The following table illustrates how payload bits and signaling bits are multiplexed together into the
16.384Mbit/s data stream.
B
B
B
B
B
1
5
5
5
5
IT
IT
IT
IT
IT
3
0
1
2
3
0
0
0
0
0
B
B
B
B
B
A
A
A
A
1
IT
IT
IT
IT
IT
3
0
1
2
3
1
1
1
1
1
B
B
B
B
B
2
6
6
6
6
IT
IT
IT
IT
IT
3
0
1
2
3
2
2
2
2
2
B
B
B
B
B
2
B
B
B
B
IT
IT
IT
IT
IT
3
0
1
2
3
3
3
3
3
3
273
B
B
B
B
B
3
7
7
7
7
IT
IT
IT
IT
IT
3
0
1
2
3
4
4
4
4
4
B
B
B
B
B
C
C
C
C
3
IT
IT
IT
IT
IT
3
0
1
2
3
5
5
5
5
5
OCTAL T1/E1/J1 FRAMER
B
B
B
B
B
4
8
8
8
8
IT
IT
IT
IT
IT
3
0
1
2
3
6
6
6
6
6
XRT84L38
B
B
B
B
B
D
D
D
D
4
IT
IT
IT
IT
IT
3
0
1
2
3
7
7
7
7
7