DS2154 Dallas Semiconducotr, DS2154 Datasheet - Page 22

• Manufacturer Part Number: DS2154
• Description: Enhanced E1 Single Chip Transceiver
• Manufacturer: Dallas Semiconducotr

SYNC/RESYNC CRITERIA Table 3-1
FRAME OR MULTI-
FRAME LEVEL
CRC4
CAS
FAS
FAS present in frame N and N +
2, and FAS not present in frame
N + 1
Two valid MF alignment words
found within 8 ms
Valid MF alignment word found
and previous timeslot 16 contains
code other than all 0s
SYNC CRITERIA
Must be cleared and set again for a subsequent resync.
22 of 87
Three consecutive
incorrect FAS received
Alternate (RCR1.2=1)
the above criteria is met
or three consecutive
incorrect bit 2 of non-
FAS received
915 or more CRC4 code
words out of 1000
received in error
Two consecutive MF
alignment words
received in error
RESYNC CRITERIA
4.2 and 4.3.2
ITU SPEC.
G.706
G.706
G.732
4.1.1
4.1.2
5.2
DS2154