ds26518 Maxim Integrated Products, Inc., ds26518 Datasheet - Page 69

• Manufacturer Part Number: ds26518
• Description: 8-port T1/e1/j1 Transceiver
• Manufacturer: Maxim Integrated Products, Inc.

9.9.10 DS0 Monitoring Function
The DS26518 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. Registers Related to DS0 Monitoring
Transmit DS0 Channel Monitor Select
Register (TDS0SEL)
Transmit DS0 Monitor Register
(TDS0M)
Receive Channel Monitor Select Register
(RDS0SEL)
Receive DS0 Monitor Register
(RDS0M)
Note: The addresses shown above are for Framer 1. Addresses for Framers 2 to 8 can be calculated using the following: Framer n = (Framer 1
address + (n - 1) x 200hex), where n = 2 to 8 for Framers 2 to 8.
In the transmit direction the user will determine which channel is to be monitored by properly setting the TCM[4:0]
bits in the
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:
TDS0SEL
REGISTER
register. In the receive direction, the RCM[4:0] bits in the
Table 9-32
shows the registers related to the control of transmit and receive DS0.
TCM4 = 0
TCM3 = 0
TCM2 = 1
TCM1 = 0
TCM0 = 1
ADDRESSES
FRAMER 1
69 of 286
1BBh
189h
012h
060h
RCM4 = 0
RCM3 = 1
RCM2 = 1
RCM1 = 1
RCM0 = 0
Transmit channel to be monitored.
Monitored data.
Receive channel to be monitored.
Monitored data.
DS26518 8-Port T1/E1/J1 Transceiver
RDS0SEL
FUNCTION
register need to be