TXC-04252AIPQ Transwitch Corporation, TXC-04252AIPQ Datasheet - Page 60

• 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

Ed. 3, December 2000
QE1M
TXC-04252
TXC-04252-MB
Eight independent pointer-tracking state machines are used in the Quad E1 Mapper, one for each of the A and
B buses in each of the four ports 1, 2, 3, and 4. The pointer tracking algorithm is illustrated in 19. The pointer
tracking state machine is based on the pointer tracking machine found in the latest ETSI requirements, and is
also valid for both Bellcore and ANSI. When control bit PTALTE at address 014H, bit 1 is 0, the transition from
AIS to LOP is disabled (shown dotted), which is required in Bellcore recommendations.
(Accept New Offset)
(Accept New Offset)
NDF_enable
NDF_enable
Proprietary TranSwitch Corporation Information for use Solely by its Customers.
NDF
INC
(Offset Undefined)
8 x NDF_enable
Figure 19. TU/VT Pointer Tracking State Machine
(Accept New Offset)
(Accept New Offset)
(Accept New Offset)
(Accept New Offset)
3 x new_point
3 x any_point
NDF_enable
DATA SHEET
3 x new_point
3 x any_point
(Incr. Offset)
NDF_enable
inc_ind
LOP
(Offset Undefined)
(Accept New Offset)
(Accept New Offset)
8 x inv_point
(Offset Undefined)
3 x new_point
- 60 of 148 -
NDF_enable
3 x AIS_ind
(Offset Undefined)
(Offset Undefined)
(Offset Undefined)
3 x AIS_ind
8 x inv_point
3 x AIS_ind
NORM
(Accept New Offset)
(Accept New Offset)
(Accept New Offset)
3 x new_point
3 x new_point
(Offset Undefined)
3 x new_point
3 x any_point
(Decr. Offset)
3 x AIS_ind
dec_ind
DEC
AIS
(Offset Undefined)
3 x AIS_ind