DS26519G datasheet(79/310 Pages) MAXIM

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DS26519 16-Port T1/E1/J1 Transceiver

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9.9.10 DS0 Monitoring Function

The DS26519 can monitor one DS0 (64kbps) channel in the transmit direction and one DS0 channel in the receive

direction at the same time. Table 9-32 shows the registers related to the control of transmit and receive DS0.

Table 9-32. Registers Related to DS0 Monitoring

FRAMER 1

ADDRESSES

FUNCTION

Transmit DS0 Channel Monitor Select

189h

Transmit channel to be monitored.

Transmit DS0 Monitor Register

(TDS0M)

1BBh

Monitored data.

Receive Channel Monitor Select Register

(RDS0SEL)

012h

Receive channel to be monitored.

Receive DS0 Monitor Register

(RDS0M)

060h

Monitored data.

Note: The addresses shown above are for Framer 1.

In the transmit direction the user will determine which channel is to be monitored by properly setting the TCM[4:0]

bits in the TDS0SEL register. In the receive direction, the RCM[4:0] bits in the RDS0SEL register need to be

properly set. The DS0 channel pointed to by the TCM[4:0] bits will appear in the Transmit DS0 Monitor Register

(TDS0M) and the DS0 channel pointed to by the RCM[4:0] bits will appear in the Receive DS0 Monitor Register

(RDS0M). The TCM[4:0] and RCM[4:0] bits should be programmed with the decimal decode of the appropriate

T1or E1 channel. T1 channels 1 to 24 map to register values 0 to 23. E1 channels 1 to 32 map to register values 0

to 31. 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 TDS0SEL and RDS0SEL:

TCM4 = 0

RCM4 = 0

TCM3 = 0

RCM3 = 1

TCM2 = 1

RCM2 = 1

TCM1 = 0

RCM1 = 1

TCM0 = 1

RCM0 = 0

DS26519G Datasheet(PDF) 79 Page - Maxim Integrated Products

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