XRT72L50 Datasheet, PDF (111/471 Pages) Exar Corporation – SINGLE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

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XRT72L50
SINGLE CHANNEL DS3/E3 FRAMER WITH HDLC CONTROLLER
REV. 1.2.1
2.3.6.15 Transmit E3 TTB-8 Register (E3, ITU-T G.832)
TxE3 TTB-8 Register (Address = 0x40)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-8[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
This Read/Write byte-field, along with the Tx TTB-0 through Tx TTB-7 and Tx TTB-9 through Tx TTB-15
registers permit a user to define a Trail Access Point Identifier sequence of bytes, that will be transmitted to the
Remote Terminal. The Remote Receiving Terminal will use this sequence of bytes to verify that it is connected
to the proper Transmitting Terminal. The Transmit DS3/E3 Framer block will take the contents of these 16
registers, and insert them into the TR byte of the outbound E3 frame. In the ninth of a set of 16 E3 Frames, the
Transmit DS3/E3 Framer block will read in the contents of this register, and insert it into the TR byte-field, within
the very next outbound E3 frame.
The contents of this register, along with Tx TTB-1 through Tx TTB-7 and Tx TTB-9 through Tx TTB-15 are
used to transmit 15 ASCII characters required for the E.164 numbering format.
2.3.6.16 Transmit E3 TTB-9 Register (E3, ITU-T G.832)
TxE3 TTB-9 Register (Address = 0x41)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-9[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
This Read/Write byte-field, along with the Tx TTB-0 through Tx TTB-8 and Tx TTB-10 through Tx TTB-15
registers permit a user to define a Trail Access Point Identifier sequence of bytes, that will be transmitted to the
Remote Terminal. The Remote Receiving Terminal will use this sequence of bytes to verify that it is connected
to the proper Transmitting Terminal. The Transmit DS3/E3 Framer block will take the contents of these 16
registers, and insert them into the TR byte of the outbound E3 frame. In the tenth of a set of 16 E3 Frames, the
Transmit DS3/E3 Framer block will read in the contents of this register, and insert it into the TR byte-field, within
the very next outbound E3 frame.
The contents of this register, along with Tx TTB-1 through Tx TTB-8 and Tx TTB-10 through Tx TTB-15 are
used to transmit 15 ASCII characters required for the E.164 numbering format.
2.3.6.17 Transmit E3 TTB-10 Register (E3, ITU-T G.832)
TxE3 TTB-10 Register (Address = 0x42)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-10[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
This Read/Write byte-field, along with the Tx TTB-0 through Tx TTB-9 and Tx TTB-11 through Tx TTB-15
registers permit a user to define a Trail Access Point Identifier sequence of bytes, that will be transmitted to the
Remote Terminal. The Remote Receiving Terminal will use this sequence of bytes to verify that it is connected
to the proper Transmitting Terminal. The Transmit DS3/E3 Framer block will take the contents of these 16
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