TXC-04252AIPQ Transwitch Corporation, TXC-04252AIPQ Datasheet - Page 63

• Manufacturer Part Number: TXC-04252AIPQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-04252AIPQ

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

V5 and K4 (Z7) Byte Coding (for 1-Bit RDI)
In the Receive (Rx) direction bit 8 in the V5 byte is used to detect Remote Defect Indications. Bits 5, 6, and 7 in
the Rx K4(Z7) byte are not looked at for detecting RDI and can have any incoming value, 0 or 1.
For transmitting 1-Bit RDI, bit 8 in V5 byte will be set as shown below and bits 5,6,7 in the K4(Z7) byte will be
sent as 0. See table below:
Receive RDI Detection and Recovery (for 1-Bit RDI)
The RDI alarm is defined in the table below. The number of consecutive events for detection and recovery is
controlled by a Common Register - Provisioning Control bit V5AL10 (register 014H, bit 2). When V5AL10 = 0,
the value is 5; when V5AL10 = 1, the value is 10. A Remote Defect Indication is indicated by alarm indication
bit AnRDIS/BnRDIS. Alarm indication bits AnRDIP/BnRDIP and AnRDIC/BnRDIC are disabled and will always
be equal to zero when 1-Bit RDI mode is selected.
Transmit RDI Generation (for 1-Bit RDI)
An RDI is sent for the following unlatched alarm conditions in the V5 overhead byte 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). The vari-
able s refers to the STS-1 or AU-3/TUG-3 identifier (s = 1 - 3).
- When RDI enable (RDIEN) is 1, a remote defect indication (bit 8 in V5=1; bits 5,6,7 in K4(Z7)=0) is sent for:
Bit 8 V5
0
1
- VT Loss of Pointer (AnLOP , BnLOP)
- VT AIS (AnAIS, BnAIS)
- A/B Drop Bus Upstream AIS in H1/H2 or the E1 byte (AsUAISI, BsUAISI), when HEAISE is 1.
- Unequipped Signal Label (AnUNEQ, BnUNEQ), when UQAE is 1.
- J2 Loss of Lock (A1J2LOL, B1J2LOL), when J21AISE is a 1.
- J2 Mismatch (A1J2TIM, B1J2TIM), when J21AISE is 1
- Microprocessor writes a 1 to T1RDIS to generate a Remote Defect Indication.
AnRDIC
BnRDIC
Proprietary TranSwitch Corporation Information for use Solely by its Customers.
0
0
Bit 5 K4 (Z7) Bit 6 K4 (Z7) Bit 7 K4 (Z7)
0
0
AnRDIP
BnRDIP
0
0
0
0
RDI Alarm Definition for 1-Bit RDI
RDI Bit Assignment for 1-Bit RDI
AnRDIS
BnRDIS
0
1
DATA SHEET
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0
0
No defect indications.
Remote Defect Indication.
No defect indications.
Remote Defect Indication.
Action
Definition
Ed. 3, December 2000
TXC-04252
TXC-04252-MB
QE1M