tdat04622 ETC-unknow, tdat04622 Datasheet - Page 24

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

for Version 1 and 1A of the Device
Overhead Processor (OHP)
OHP3. M1 Error Counter in STS-48/STM-16 Mode
When the device receives REI-L errors in the STS-48/STM-16 mode, no M1 errors are reported.
Workaround
There are several workarounds for this problem:
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Corrective Action
This condition will be addressed in future versions of the device.
Packaging and Pinouts (P)
P1. Pin F5 (Previously JTEST) Is No Connect (NC)
Item deleted. Corrected in the advance data sheet.
P2. Modified Pinout and Power Supply Configuration—Future Versions
Item deleted. No modifications to the power supply configuration will be made.
P3. Change to TDAT042G5 Version 1 Pinout
Item deleted. All devices conform to power pin assignments as listed in the advance data sheet.
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Pass the B2 error count value to the far end through system software.
Process the M1 byte from the receive TOAC with an external FPGA.
Pass the B2 error count from the receive to the transmit direction using transmit TOAC capability. The error count
must be inserted into the eleventh Z2 byte in an STS-48/STM-16 transmit signal. The transmit TOAC signal is
driven by an external device with software insert capability.
Pass the B2 error count from the receive to the transmit direction in the section overhead byte. The device has F1
and S1 monitor capability; the protocol for sending the error message to the far end with F1 or S1 bytes is user-
defined.
(continued)
Agere Systems Inc.
May 2001