DS2196 Dallas Semiconducotr, DS2196 Datasheet - Page 67

• Manufacturer Part Number: DS2196
• Description: T1 Dual Framer LIU
• Manufacturer: Dallas Semiconducotr

Table 8-2: PATH CODE VIOLATION COUNTING ARRANGEMENTS
MULTIFRAMES OUT OF SYNC COUNT REGISTER (MOSCR)
Normally the MOSCR is used to count the number of multiframes that the receive synchronizer is out of
sync (RCR2.0=1). This number is useful in ESF applications needing to measure the parameters Loss Of
Frame Count (LOFC) and ESF Error Events as described in AT&T publication TR54016. When the
MOSCR is operated in this mode, it is not disabled during receive loss of synchronization (RLOS=1)
conditions. The MOSCR has alternate operating mode whereby it will count either errors in the Ft
framing pattern (in the D4 mode) or errors in the FPS framing pattern (in the ESF mode). When the
MOSCR is operated in this mode, it is disabled during receive loss of synchronization (RLOS = 1)
conditions. See Table 8-3 for a detailed description of what the MOSCR is capable of counting.
MOSCR1A: MULTIFRAMES OUT OF SYNC COUNT REGISTER 1 FRAMER A
(Address = 25 Hex)
MOSCR2A: MULTIFRAMES OUT OF SYNC COUNT REGISTER 2 FRAMER A
(Address = 27 Hex)
MOSCR1B: MULTIFRAMES OUT OF SYNC COUNT REGISTER 1 FRAMER B
(Address = C5 Hex)
MOSCR2B: MULTIFRAMES OUT OF SYNC COUNT REGISTER 2 FRAMER B
(Address = C7 Hex)
NOTES:
1. The lower nibble of the counter at address 25 is used by the Path Code Violation Count Register
2. MOSCR counts either errors in framing bit position (RCR2.0=0) or the number of multiframes out of
Table 8-3: MULTIFRAMES OUT OF SYNC COUNTING ARRANGEMENTS
(MSB)
MOS/
MOS/
FB11
FB7
MOS/FB11
SYMBOL
sync (RCR2.0=1)
FRAMING MODE
MOS/FB0
(CCR2.3)
ESF
D4
D4
MOS/
MOS/
FB10
FB6
POSITION
MOSCR1.7
MOSCR2.0
MOS/
MOS/
FB9
FB5
COUNT Fs ERRORS?
MOS/
MOS/
FB8
FB4
(RCR2.1)
don’t care
NAME AND DESCRIPTION
MSB of the 12–Bit Multiframes Out of Sync or F–Bit Error
Count (note #2)
LSB of the 12–Bit Multiframes Out of Sync or F–Bit Error
Count (note #2)
yes
no
(note 1)
MOS/
FB3
67 of 157
(note 1)
errors in the Ft pattern
errors in both the Ft & Fs patterns
errors in the CRC6 code words
MOS/
FB2
WHAT IS COUNTED
(note 1)
IN THE PCVCRs
MOS/
FB1
(note 1)
(LSB)
MOS/
FB0
MOSCR1
MOSCR2
DS2196