XRT7250 Datasheet, PDF (114/463 Pages) Exar Corporation – DS3/E3 FRAMER IC

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DS3/E3 FRAMER IC
XRT7250
REV. 1.1.1
The contents of this register, along with Tx TTB-1, Tx
TTB-2 and Tx TTB-4 through Tx TTB-15 are used to
transmit 15 ASCII characters required for the E.164
numbering format.
2.3.6.11 Transmit E3 TTB-4 Register (E3, ITU-T
G.832)
TXE3 TTB-4 REGISTER (ADDRESS = 0X3C)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-4[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 TxTTB-0
through TxTTB-3 and TxTTB-5 through TxTTB-15
registers allows a user to define a Trail Access Point
Identifier sequence of bytes, that will be transmitted to
the Far-End Terminal. The Far-End Receiving Termi-
nal will use this sequence of bytes to verify that it is
connected to the proper Transmitting Terminal. The
Transmit E3 Framer will take the contents of these 16
registers, and insert them into the TR byte of the out-
bound E3 frame. In the fifth of a set of 16 E3 Frames,
the Transmit E3 Framer 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-3 and Tx TTB-5 through Tx TTB-15
are used to transmit 15 ASCII characters required for
the E.164 numbering format.
2.3.6.12 Transmit E3 TTB-5 Register (E3, ITU-T
G.832)
TXE3 TTB-5 REGISTER (ADDRESS = 0X3D)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-5[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-4 and Tx TTB-6 through Tx TTB-15
registers allows a user to define a Trail Access Point
Identifier sequence of bytes, that will be transmitted to
the Far-End Terminal. The Far-End Receiving Termi-
nal will use this sequence of bytes to verify that it is
connected to the proper Transmitting Terminal. The
Transmit E3 Framer will take the contents of these 16
registers, and insert them into the TR byte of the out-
bound E3 frame. In the sixth of a set of 16 E3
Frames, the Transmit E3 Framer will read in the con-
tents 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-4 and Tx TTB-6 through Tx TTB-15
are used to transmit 15 ASCII characters required for
the E.164 numbering format.
2.3.6.13 Transmit E3 TTB-6 Register (E3, ITU-T
G.832)
TXE3 TTB-6 REGISTER (ADDRESS = 0X3E)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-6[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-5 and Tx TTB-7 through Tx TTB-15
registers allows a user to define a Trail Access Point
Identifier sequence of bytes, that will be transmitted to
the Far-End Terminal. The Far-End Receiving Termi-
nal will use this sequence of bytes to verify that it is
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