XRT72L56 Datasheet, PDF (133/486 Pages) Exar Corporation – SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

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SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
PRELIMINARY
XRT72L56
REV. P1.1.2
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-6 and Tx TTB-8 through Tx TTB-15
are used to transmit 15 ASCII characters required for
the E.164 numbering format.
2.4.6.15 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 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 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.
2.4.6.16 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 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 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.
2.4.6.17 Transmit E3 TTB-10 Register (E3, ITU-T
G.832)
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