tdat04622 ETC-unknow, tdat04622 Datasheet - Page 17

• Manufacturer Part Number: tdat04622
• Description: Tdat Sonet/sdh 155/622/2488 Mbits/s Data Interfaces
• Manufacturer: ETC-unknow

May 2001
Agere Systems Inc.
UTOPIA (UT)
UT7. Response to 0x1F MPHY Address
TDAT042G5 MPHY currently generates a polled status response to the address 0x1F (the null address), which is
not compliant with the UTOPIA Level 2 standard. The address 0x1F is valid for UTOPIA Level 3 operation.
Workaround
No workaround is available for this condition.
Corrective Action
This condition will be addressed in future versions of the device.
UT8. Far-End Loopback Bandwidth Limitations
In the STS-48/STM-16 mode (U3, U3+), looping back data at the far end (UTOPIA interface) can only be accom-
plished without cell/packet corruption at rates below the following, as shown in Table 5.
Table 5. Cell/Packet Corruption Rates
When cell/packet corruption occurs, the device reports transmit FIFO underflow.
Workaround
No workaround is available for this condition.
Corrective Action
This condition will be addressed in future versions of the device.
STS-48/STM-16
STS-12/STM-4
STS-3/STM-1
Mode
(continued)
300 Mbits/s
70 Mbits/s
30 Mbits/s
ATM
Rate not yet determined
Rate not yet determined
Rate not yet determined
Packet
for Version 1 and 1A of the Device
15