cx29503 Mindspeed Technologies, cx29503 Datasheet - Page 64

• Manufacturer Part Number: cx29503
• Description: Cx29503 Broadband Access Multiplexer Data Sheet
• Manufacturer: Mindspeed Technologies

Functional Description
2.6.2
2.6.2.1
2.6.2.2
2.6.2.3
2-16
SONET/SDH Mapper/MUX Transmitter
This section describes the SONET/SDH Mapper/MUX block’s transmit side
SI-Bus Transmitter Interface
The SI-Bus Transmitter interface is the TX physical interface to the SI-Bus. It strobes
TX control from the SI-Bus and generates the internal control to be used by the
transmit side and drives the byte-wide data bus with parity from the transmit side onto
the SI-Bus. Control is strobed on the falling edge and data is driven on the rising edge
of the 19.44 MHz SI-Bus transmitter clock.
STS-1/TUG-3 Overhead Insertion
The STS-1/TUG-3 Overhead Insertion block inserts various STS Path Overhead into
either the DS3/E3 Mapped STS-1, VT Mapped STS-1, or Unchannelized STS-1 data
from the TSB interface. This includes a pointer value of 522 (0 × 20A) into the H1/H2
bytes as well as section and line DCC data bytes, path overhead user channels, and
tandem data link from the TSB. If the TSB interface is the source of the
unchannelized STS-1 data, the necessary stuffing is inserted in the STS-1 frame
structure.
VT Build and VT Overhead Insertion
The VT build and VT overhead insertion takes a DS1/E1-mapped VT from the DS1/
E1 Mapping function from the TSB interface and inserts the proper VT overhead in
each VT in the superframe. It generates the proper H4 path overhead byte value. This
VT overhead includes fixed VT pointers, and automatically generates BIP2, REI-V,
and RDI-V when enabled. Other overhead is taken from provisioned registers for the
Signal Label and RFI-V fields in the V5 byte, 16-byte J2 trace, Z6 byte, and Z7 byte.
Various modes of inserting errors on Bit Interleaved Parity-2 bits (BIP-2s) and
Remote Error Indications (REIs) are provided for diagnostic purposes.
Mindspeed Technologies™
Preliminary Information
CX29503 Data Sheet
29503-DSH-002-B