DS2152L datasheet(41/94 Pages) DALLAS

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DS2152

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MULTIFRAMES OUT OF SYNC COUNTING ARRANGEMENTS Table 5-3

FRAMING MODE

(CCR2.3)

COUNT MOS OR F-BIT

ERRORS (RCR2.0)

WHAT IS COUNTED

IN THE MOSCRs

MOS

number of multiframes out of sync

F-Bit

errors in the Ft pattern

ESF

MOS

number of multiframes out of sync

ESF

F-Bit

errors in the FPS pattern

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)

(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

RCM4 = 0

TCM3 = 0

RCM3 = 1

TCM2 = 1

RCM2 = 1

TCM1 = 0

RCM1 = 1

TCM0 = 1

RCM0 = 0

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