XRT72L50 Datasheet, PDF (113/471 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
2.3.6.20 Transmit E3 TTB-13 Register (E3, ITU-T G.832)
TxE3 TTB-13 Register (Address = 0x45)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-13[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-12, Tx-TTB-14, and 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 fourteenth 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-12, Tx TTB-14 and Tx TTB-15 are used to
transmit 15 ASCII characters required for the E.164 numbering format.
2.3.6.21 Transmit E3 TTB-14 Register (E3, ITU-T G.832)
TxE3 TTB-14 Register (Address = 0x46)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-14[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-13 and 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 fifteenth 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-13 and Tx TTB-15 are used to transmit 15
ASCII characters required for the E.164 numbering format.
2.3.6.22 Transmit E3 TTB-15 Register (E3, ITU-T G.832)
TxE3 TTB-15 Register (Address = 0x47)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-15[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-14 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
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