IDT82P2288 Integrated Device Technology, Inc., IDT82P2288 Datasheet - Page 89

• Manufacturer Part Number: IDT82P2288
• Description: 8 Channel T1/J1/E1 Transceiver
• Manufacturer: Integrated Device Technology, Inc.

IDT82P2288
Table 55: Related Bit / Register In Chapter 3.20.3
3.20.4
ESF format in T1/J1 mode.
the F-bit in the ESF format. The six ‘X’s represent the code that is pro-
grammed in the XBOC[5:0] bits. The BOM is transmitted only if the
XBOC[5:0] bits are not all ’One’s.
3.20.5
loopback code in a framed or unframed T1/J1 data stream.
grammed in the CL[1:0] bits and the IBC[7:0] bits respectively. The code
can only be transmitted when the IBCDEN bit is enabled. In framed
mode, which is configured by the IBCDUNFM bit, the bits in all 24 chan-
nels are overwritten with the inband loopback code and the F-bit is not
changed. In unframed mode, which is configured by the IBCDUNFM bit,
all the bits in 24 channels and the F-bit are overwritten with the inband
loopback code.
Table 56: Related Bit / Register In Chapter 3.20.4 & Chapter 3.20.5
IBCDUNFM
XBOC[5:0]
The Bit Oriented Message (BOM) can only be transmitted in the
The BOM pattern is ‘111111110XXXXXX0’ which occupies the DL of
The Inband Loopback Code Generator can only transmit inband
The length and the content of the inband loopback code are pro-
IBCDEN
IBC[7:0]
CL[1:0]
AUTOPRM
Bit
CRBIT
U1BIT
U2BIT
LBBIT
RBIT
Bit
BIT-ORIENTED MESSAGE TRANSMITTER (T1/J1 ONLY)
INBAND LOOPBACK CODE GENERATOR (T1/J1 ONLY)
XIBC Control
XBOC Code
XIBC Code
Register
APRM Control
Register
080, 180, 280, 380, 480, 580, 680, 780
075, 175, 275, 375, 475, 575, 675, 775
074, 174, 274, 374, 474, 574, 674, 774
T1/J1 Address (Hex)
07F, 17F, 27F, 37F, 47F,
T1/J1 Address (Hex)
57F,67F, 77F
78
3.20.6
all the data stream if the TAIS bit and the TXDIS bit are set. The all zeros
transmission takes a higher priority.
3.20.7
will lead to one-bit deletion or one-bit repetition in the data stream to be
transmitted, that is, to change the frame alignment position. The one-bit
deletion or repetition occurs randomly.
OCTAL T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
After all the above processes, all ’One’s or all ‘Zero’s will overwrite
Any transition (from ‘0’ to ‘1’ or from ‘1’ to ‘0’) on the COFAEN bit
ALL ‘ZERO’S & ALL ‘ONE’S
CHANGE OF FRAME ALIGNMENT
March 22, 2004