TMPR28051-3-SL5 datasheet(2/90 Pages) AGERE

部品番号	TMPR28051-3-SL5

部品情報	TMPR28051 STS-1/AU-3 (STM-0) Mapper Device Advisory for Version 5 of the Device

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Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No

rights under any patent accompany the sale of any such product(s) or information.

August 5, 1999

AY99-025SONT (Must accompany DS99-068SONT)

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TMPR28051 STS-1/AU-3 (STM-0) Mapper

Advisory

Device Advisory for Version 5 of the Device

August 5, 1999

Error Insertion (EI) (continued)

EI-3. False S-BIP, L-BIP, and P-BIP Error Insertion

The device transmits S-BIP, L-BIP, and P-BIP errors when configured for automatic insertion of REI, and certain

STS-1 error conditions such as LOS, LOF, LOP-P, S-BIP, L-BIP, and P-BIP are inserted.

VT Alarms (VT)

VT-1. VT Path Payload Label Mismatch

The device reports PLM-V when it detects three consecutive consistent new values for the VT label. This is in com-

pliance with G.783 Section 2.2.2.7 and T1.231 Section 8.1.3.5.2.4.2 specifications, but is not compliant with

GR-253 Section 6.2.1.1.8.C.

VT-2. Failure in the Detection of VT Loss of Pointer Defects

The device also apparently fails to detect an LOP-V defect when it continuously receives a VT pointer word of

6C68 (i.e., a value indicating a VT1.5 with an offset of 104 bytes, versus a maximum valid offset of 103 bytes). In

this case, the device inserts the required DS1 AIS downstream, but does not subsequently declare an LOP-V fail-

ure (nonconformance to GR 253, R6-71).

VT-3. Inappropriate Termination of VT Loss of Pointer Defect Condition

After the device has detected an LOP-V defect, it inappropriately terminates that defect upon receiving two pointer

words containing the same value as the previous valid pointer. According to GR 253, an LOP-V defect must not be

terminated unless a valid pointer is received in three consecutive VT superframes (nonconformance to GR 253,

R6-75).

VT-4. Inappropriate Termination of VT Alarm Indication Signal Defect Condition

After the device has detected an AIS-V defect, it inappropriately terminates that defect upon receiving two pointer

words containing the same value as the previous valid pointer and without a set NDF (e.g., with the N bits set to

0110). According to GR 253, an AIS-V defect must not be terminated unless a normal valid pointer is received in

three consecutive VT superframes, or a valid pointer with a set NDF is received in one VT superframe (nonconfor-

mance to GR 253, R6-183).

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