TXC-04251AIPQ Transwitch Corporation, TXC-04251AIPQ Datasheet - Page 44

• Manufacturer Part Number: TXC-04251AIPQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-04251AIPQ

• Pin Count: 160
• Screening Level: Industrial
• Package Type: PQFP
• Lead Free Status / Rohs Status: Not Compliant

TXC-04251-MB
Ed. 4, March 2000
QT1M
TXC-04251
Remote Defect Indications Generation
An RDI is sent for the following unlatched alarm conditions in the V5 and Z7 overhead bytes of the VT added to
the A or B Add bus, depending on the states of the RnSEL (active bus selected), TnSEL1 and TnSEL0 (bus
enabled) control bits. The following examples apply to port 1, but corresponding examples for ports 2 through 4
may be constructed by substituting the port number digit for the 1-digit in the bit symbols (except DV1SEL).
- When RDI enable (RDIEN) is 1, a remote payload defect indication is sent for:
- When RDI enable (RDIEN) is 1, a remote server defect indication is sent for:
- When RDI enable (RDIEN) is 1, a remote connectivity defect indication is sent for:
- When RDI enable (RDIEN) is 0, the microprocessor can control RDI generation:
Note: The microprocessor may send an RDI by writing to the above control bits at any time, including the add
only mode. To prevent contention between the internal logic and full microprocessor control, the RDIEN
control bit should be written with a 0 when microprocessor control is intended. The three control bits
TnRDIS, TnRDIP and TnRDIC may only be activated one at a time, since activation of two or more at the
same time can cause decode errors.
- A/B Drop H4 Error (A1DH4E, B1DH4E), when DV1SEL is 0
- Mismatch signal label (A1SLER, B1SLER)
- Loss of Pointer (A1LOP , B1LOP)
- VT AIS (A1AIS, B1AIS)
- A/B Drop Bus Upstream AIS in H1/H2 or the E1 byte (AnUAISI, BnUAISI), and HEAISE is 1
- Unequipped signal label (A1UNEQ, B1UNEQ) and UQAE is 1
- Microprocessor writes a 1 to T1RDIS to generate remote server defect indication.
- Microprocessor writes a 1 to T1RDIP to generate remote payload defect indication.
- Microprocessor writes a 1 to T1RDIC to generate remote connectivity defect indication.
(where n represents the STS-1 or TUG in which the VT/TU has been selected).
DATA SHEET
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