DS2152
MULTIFRAMES OUT OF SYNC COUNTING ARRANGEMENTS Table 5-3
FRAMING MODE
COUNT MOS OR F-BIT
WHAT IS COUNTED
IN THE MOSCRs
number of multiframes out of sync
errors in the Ft pattern
number of multiframes out of sync
errors in the FPS pattern
(CCR2.3)
D4
ERRORS (RCR2.0)
MOS
F-Bit
MOS
F-Bit
D4
ESF
ESF
6.0 DS0 MONITORING FUNCTION
The DS2152 has the ability to monitor one DS0 64kbps channel in the transmit direction and one DS0
channel in the receive direction at the same time. In the transmit direction the user will determine which
channel is to be monitored by properly setting the TCM0 to TCM4 bits in the CCR5 register. In the
receive direction, the RCM0 to RCM4 bits in the CCR6 register need to be properly set. The DS0
channel pointed to by the TCM0 to TCM4 bits will appear in the Transmit DS0 Monitor (TDS0M)
register and the DS0 channel pointed to by the RCM0 to RCM4 bits will appear in the Receive DS0
(RDS0M) register.
The TCM4 to TCM0 and RCM4 to RCM0 bits should be programmed with the decimal decode of the
appropriate T1 channel. For example, if DS0 channel 6 in the transmit direction and DS0 channel 15 in
the receive direction needed to be monitored, then the following values would be programmed into CCR5
and CCR6:
TCM4 = 0
TCM3 = 0
TCM2 = 1
TCM1 = 0
TCM0 = 1
RCM4 = 0
RCM3 = 1
RCM2 = 1
RCM1 = 1
RCM0 = 0
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DALLAS [ DALLAS SEMICONDUCTOR ]
