IDT82P2282 Integrated Device Technology, Inc., IDT82P2282 Datasheet - Page 73
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IDT82P2282
Manufacturer Part Number
IDT82P2282
Description
2 Channel T1/J1/E1 Transceiver
Manufacturer
Integrated Device Technology, Inc.
Datasheet
1.IDT82P2282.pdf
(383 pages)
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IDT82P2282
standard 1.544 MHz clock, and the data in the F-bit and all 24 channels
in a standard T1/J1 frame are clocked in by the TSCKn.
3.18.1.1.2
Master mode, the special feature in this mode is that the TSCKn is a
gapped 1.544 MHz clock (no clock signal during the selected channel).
‘1’. The TSCKn is also gapped during the channels or the Bit 8 duration
by selecting the G56K & GAP bits in the Transmit Payload Control. The
data in the corresponding gapped duration is a Don't Care condition.
3.18.1.2
1.544 Mb/s or 2.048 Mb/s. If the system data rate is 1.544 Mb/s, it works
in T1/J1 mode. If the system data rate is 2.048 Mb/s, the data stream to
be transmitted should be mapped to 1.544 Mb/s, that is, to work in T1/J1
mode E1 rate. Three kinds of schemes are provided by selecting the
MAP[1:0] bits:
2.048
1.544
Mb/s
Mb/s
2.048
1.544
Mb/s
Mb/s
Besides all the common functions described in the Transmit Clock
The TSCKn is gapped during the F-bit if the FBITGAP bit is set to
In the Transmit Clock Slave mode, the system data rate can be
discarded
discarded
F
TS0
F
Transmit Clock Slave Mode
CH1
TS0
Transmit Clock Master Fractional T1/J1 Mode
the 8th bit
CH1
TS1
TS1
Figure 25. E1 To T1/J1 Format Mapping - One Filler Every Four Channels Mode
CH2
CH2
TS2
TS2
CH3
TS3
Figure 24. E1 To T1/J1 Format Mapping - G.802 Mode
discarded
CH14
CH4
TS14 TS15 TS16 TS17 TS18
TS4
CH15
CH5
TS5
discarded
TS6
CH6
CH16
TS7
CH7
CH17
discarded
62
TS8
of Frame N on the system side are converted into Channel 1 to Channel
15 of Frame N to the device; TS17 to TS25 of Frame N on the system
side are converted into Channel 16 to Channel 24 of Frame N to the
device. The first bit of TS26 of Frame (N-1) on the system side is con-
verted into the F-bit of Frame N to the device. TS0, TS16, TS27~TS31
and the other 7 bits in TS26 on the system side are all discarded.
Figure 25): The 8th bit of Frame N on the system side is converted to the
F-bit of the Frame N to the device. Then one byte of the system side is
discarded after the previous three bytes are converted into the device.
This process repeats 8 times and the conversion of one frame is com-
pleted. Then the process goes on.
TS1 to TS24 of Frame N on the system side are converted into Channel
1 to Channel 24 of Frame N to the device. The 8th bit of Frame N on the
system side is converted into the F-bit of Frame N to the device. The first
7 bits and TS25 to TS31 on the system side are all discarded.
DUAL T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
1. T1/J1 Mode E1 Rate per G.802 (refer to Figure 24): TS1 to TS15
2. T1/J1 Mode E1 Rate per One Filler Every Four CHs (refer to
3. T1/J1 Mode E1 Rate per Continuous CHs (refer to Figure 26):
TS9
CH23
CH22
TS24 TS25
discarded
TS28 TS29 TS30 TS31
CH24
the 1st bit
CH23
F
CH24
discarded discarded discarded
TS26 TS27~TS31
CH1
discarded
F
CH2
CH1
TS0
the 8th bit
CH2
October 7, 2003
TS0
TS1
CH23
TS1
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