DS3172 Maxim Integrated, DS3172 Datasheet - Page 95
![no-image](/images/no-image-200.jpg)
DS3172
Manufacturer Part Number
DS3172
Description
Network Controller & Processor ICs Dual DS3/E3 Single Chip Transceiver
Manufacturer
Maxim Integrated
Datasheet
1.DS3171.pdf
(234 pages)
Specifications of DS3172
Part # Aliases
90-31720-000
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Table 10-30. Payload Label Match Status
XXX and YYY equal any value other than 000 or 001; XXX
The multiframe indicator and timing marker bits (sixth, seventh, and eighth bits of the MA byte) can be integrated
and stored in three register bits or extracted, integrated, and stored in four register bits. The bits (three or four) are
stored with a change indication. The multiframe indicator and timing marker storage type is programmable
(integrated or extracted). When the multiframe indicator and timing marker bits are integrated, the last three bits of
the MA byte are integrated and stored in three register bits. When the multiframe indicator and timing marker bits
are extracted, four timing source indicator bits are transferred in a four-frame multiframe, MSB first. The multiframe
indicator bits (sixth and seventh bits of the MA byte) identify the phase of the multiframe (00, 01, 10, or 11). The
timing marker bit (eighth bit of the MA byte) contains the timing source indicator bit indicated by the multiframe
indicator bits (first, second, third, or fourth bit respectively). The four timing source indicator bits are extracted from
the multiframe, integrated, and stored in four register bits with unstable and change indications.
The NR byte is integrated and stored in a register along with a change indication, it is sent to the receive FEAC
controller, and it can be sent to the receive HDLC controller. The byte sent to the receive HDLC controller is
programmable (NR or GC).
The GC byte is integrated and stored in a register along with a change indication, and can be sent to the receive
HDLC controller. The byte sent to the receive HDLC controller is programmable (NR or GC).
10.6.8.10 Receive G.832 Downstream AIS Generation
Downstream G.832 E3 AIS can be automatically generated on an OOF, LOS, or AIS condition or manually
inserted. If automatic downstream AIS is enabled, downstream AIS is inserted when an LOS, OOF, or AIS
condition is declared. Automatic downstream AIS is programmable (on or off). If manual downstream AIS insertion
is enabled, downstream AIS is inserted. Manual downstream AIS insertion is programmable (on or off).
Downstream AIS is removed when all OOF, LOS, and AIS conditions are terminated and manual downstream AIS
insertion is disabled. RPDT will be forced to all ones during downstream AIS.
EXPECTED
XXX
XXX
XXX
XXX
000
000
000
001
001
001
RECEIVED
XXX
XXX
XXX
YYY
000
001
000
001
001
000
≠
YYY
Mismatch
Mismatch
Mismatch
Mismatch
Mismatch
STATUS
95
Match
Match
Match
Match
Match
DS3171/DS3172/DS3173/DS3174
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