Cisco Cisco ONS 15454 SDH Multiservice Provisioning Platform (MSPP)

The TXP_MR_2.5G and TXPP_MR_2.5G cards do not support TX Optical power performance 
monitoring on the trunk port. To see this, go to the Optics Performance Monitoring tab of the 
TXP_MR_2.5G or TXPP_MR_2.5G card, and select the trunk port. TX Optical Pwr is not shown. This 
is as designed.

SDH DS3-I and E3 electrical cards only support a VC4 J1 trace string setting for all VC4s together. You 
cannot set the J1 byte for individual VC4s. This issue is a limitation of hardware. 

VC3 J1 strings can be set individually, but the optical cards cannot monitor the VC3 J1 string.

Interconnection Equipment failure alarms may be generated at 55 degrees C, and 72 volts. When the 
operating environment is at 55 degrees C and 72 volts, interconnection equipment failure alarms for the 
following cards can occur: 

STM16SH

STM64LH

STM16LH

The alarms could potentially occur on any of these boards, as well: OC48AS, GigE, OC192 or 
OC192LR. This issue will not be resolved.

E1-14 boards with second source components can incur bit errors under extreme environmental 
conditions. When these boards operate under voltage and temperature stress conditions and a 
temperature ramp rate of 1 degree per minute, the boards could exhibit dribbling bit errors at high 
temperatures: BER = 5.5e-6. To avoid this, you must apply the temperature ramp rate at 0.5 degree per 
minute. This ramp rate complies with the NEBS standard; however, this issue will be revisited in a future 
release.

Before you upgrade to Release 6.x from Release 4.0, 4.0.1, or 4.1, you must read this caveat and run the 
SDH Circuit Repair Utility (VcCheck) provided on the software CD (also available on CCO).

The XCVXL card on the ONS 15454 SDH allows the intermixing of VC12 and VC3 payloads within a 
single VC4. When a VC4 contains only one VC12 tributary and at least one VC3 tributary and the VC12 
is deleted, the database becomes corrupt.