CX28344 Conexant, CX28344 Datasheet - Page 12

• Manufacturer Part Number: CX28344
• Description: (CX2834x) Dual / Triple / Quad / Hex / Octal - Enhanced DS3 / E3 Framer
• Manufacturer: Conexant

Product Description
1.1.1
1.1.2
1-2
DS3 Mode
E3 Mode
In DS3 mode, each of the receiver blocks provides framing recovery for DS3 M13/
M23 and DS3 C-bit parity formatted signals. The receive signals can be in B3ZS,
AMI, or NRZ format. The following events are detected and counted:
!
!
!
!
!
!
!
!
The C-bits in DS3 M13/M23 can be provided with the data or through an external pin.
Overhead bits can be selectively provided through an external pin or internally
generated. The transmitter can generate idle code and other alarm indication codes
(AIS and RAI/RDI). In addition, the alarms generated in C-bit parity mode include
FEBE and CP for performance monitoring.
Overhead bit can be selected for insertion with the data stream in this mode.
In E3 mode, each receive block provides framing recovery for E3 G.751 and E3
G.832 formatted signals. The receive signals can be in HDB3, AMI, or NRZ format.
The following events are detected and counted:
!
!
!
!
!
The Justification Control bits (Cj) in E3 G.751 can be provided with the data or
through an external pin. Overhead bits can be selectively provided through an external
pin or internally generated. The transmitter can also generate AIS and RAI/RDI
signals. In addition, REI and BIP alarm bits in E3 G.832 format are generated for
performance monitoring.
Overhead bit can be selected for insertion with the data stream in this mode. The
detailed operation in each mode is described in
P-bits
CP-bits (DS3 C-bit parity only)
FEBE (DS3 C-bit parity only)
X-bit disagreement
P-bit disagreement
Framing Error
Line Code Violation (LCV)
Excessive Zeros (EXZ) in rail mode only
BIP (G.832 only)
REI (G.832)
Framing Error
Line Code Violation (LCV)
Excessive Zeros (EXZ) in rail mode only
Mindspeed Technologies™
Chapter 2.
CX28342/3/4/6/8 Data Sheet
28348-DSH-001-B