TXC-04251AIPQ Transwitch Corporation, TXC-04251AIPQ Datasheet - Page 34

• 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
The H4 byte is used to identify the location of the V1 byte as shown in Figure 13 below:
The H4 byte is monitored for multiframe alignment when enabled. Loss of multiframe alignment is declared
(AnDH4E, BnDH4E) if two or more H4 byte values differ from those of a 2-bit counter for two consecutive mul-
tiframes. Recovery occurs when four consecutive sequential H4 byte values are detected once.
Figure 13. H4 Byte Floating VT Mode Bit Allocation
H4 (XXXX XX00)
Of Previous SPE
H4 (XXXX XX01)
H4 (XXXX XX10)
H4 (XXXX XX11)
DATA SHEET
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1544 kbit/s
VT/TU
Bytes
Bytes
Bytes
Bytes
V1
V2
V3
V4
26
26
26
26