tmxf28155 ETC-unknow, tmxf28155 Datasheet - Page 408

• Manufacturer Part Number: tmxf28155
• Description: Tmxf28155 Super Mapper 155/51 Mbits/s Sonet/sdh X28/x21 Ds1/e1
• Manufacturer: ETC-unknow

155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
18 SPE Mapper Functional Description
* This state diagram is based on the ETS 417-1-1 pointer interpretation state diagram (Figure B.1). Transitions of eight invalid pointers from the
408
INC, DEC, and NDF states into the LOP state have been added.
The pointer interpreter transitions out of the LOP-TU3 state based on the following conditions:
The pointer interpreter transitions into the AIS-TU3 state based on the following conditions:
The pointer interpreter transitions out of the AIS-TU3 state based on the following conditions:
The pointer interpreter transitions into the LOP-TU3 state based on the following conditions:
— Continuous NDF. If NDF (1001, 0001, 1101, 1011, 1000) is received for the number of consecutive frames
— Invalid pointer values. If the number of consecutive frames (determined by the value programmed in
— Following three consecutive frames with all ones in the H1 and H2 bytes the pointer interpreter transitions from
— Following three new consecutive, consistent, valid pointers the pointer interpreter transitions from the
— The pointer interpreter will not transition from the LOP-TU3 state into the NDF state.
— Following three consecutive frames with all ones in the H1 and H2 bytes AIS-TU3 is declared.
— Following three new consecutive, consistent, valid pointers the pointer interpreter transitions from the AIS-TU3
— Following the number of consecutive invalid pointers (determined by the value programmed in
— If NDF is enabled on the incoming H1 and H2 bytes, the pointer interpreter transitions from the AIS-TU3 state
(determined by the value programmed in bits SPE_CNTDLOPCNT[1:0] (
clared.
SPE_CNTDLOPCNT[1:0]) are received with a pointer that is not a normal value, NDF, AIS-TU3, increment, or
decrement, then LOP-TU3 is declared.
the LOP-TU3 state into the AIS-TU3 state.
LOP-TU3 state into the NORM state.
state into the NORM state.
SPE_CNTDLOPCNT[1:0]) the pointer interpreter transitions from the AIS-TU3 state into the LOP-TU3 state.
into the NDF state.
8 INVALID POINTERS*
FROM ALL STATES
Figure 36. Pointer Interpretation State Diagram
LOP
INC
INCREMENT
3 NEW POINTERS
INDICATION
POINTERS
8 INVALID
POINTERS
3 ANY
8 INVALID POINTERS
3 NEW POINTERS
3 NEW POINTERS
(continued)
8 NDF ENABLE
NDF ENABLE
NORM
POINTERS
3 ANY POINTERS
3 ANY
3 NEW POINTERS
NDF ENABLE
FROM ALL STATES
3 AIS INDICATIONS
ENABLE
NDF
DECREMENT
INDICATION
Table
149)), then LOP-TU3 is de-
DEC
NDF
AIS
ENABLE
ENABLE
NDF
NDF
Agere Systems Inc.
May 2001
5-9007(F)