XRT72L56 Datasheet, PDF (134/486 Pages) Exar Corporation – SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

XRT72L56 SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
REV. P1.1.2
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PRELIMINARY
TXE3 TTB-10 REGISTER (ADDRESS = 0X42)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
TxTTB-10[7:0]
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
BIT 2
R/W
0
BIT 1
R/W
0
BIT 0
R/W
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 Termi-
nal 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 eleventh 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-9 and Tx TTB-11 through Tx TTB-15
are used to transmit 15 ASCII characters required for
the E.164 numbering format.
2.4.6.18 Transmit E3 TTB-11 Register (E3, ITU-T
G.832)
TXE3 TTB-11 REGISTER (ADDRESS = 0X43)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-11[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-10 and Tx TTB-12 through Tx TTB-
15 registers permit a user to define a Trail Access
Point Identifier sequence of bytes, that will be trans-
mitted to the Remote Terminal. The Remote Receiv-
ing Terminal will use this sequence of bytes to verify
that it is connected to the proper Transmitting Termi-
nal. 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 twelfth
of a set of 16 E3 Frames, the Transmit DS3/E3 Fram-
er block will read in the contents of this register, and
insert it into the TR byte-field, within the very next out-
bound E3 frame.
The contents of this register, along with Tx TTB-1
through Tx TTB-10 and Tx TTB-12 through Tx TTB-
15 are used to transmit 15 ASCII characters required
for the E.164 numbering format.
2.4.6.19 3.3.2.77 Transmit E3 TTB-12 Register
(E3, ITU-T G.832)
TXE3 TTB-12 REGISTER (ADDRESS = 0X44)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-12[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-11 and Tx TTB-13 through Tx TTB-
15 registers permit a user to define a Trail Access
Point Identifier sequence of bytes, that will be trans-
mitted to the Remote Terminal. The Remote Receiv-
ing Terminal will use this sequence of bytes to verify
that it is connected to the proper Transmitting Termi-
nal. 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 thir-
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