XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 307

• Manufacturer Part Number: XRT94L33IB-L
• Description: IC MAPPER DS3/E3/STS-1 504TBGA
• Manufacturer: Exar Corporation

Specifications of XRT94L33IB-L

• Applications: Network Switches
• Interface: Bus
• Voltage - Supply: 3.14 V ~ 3.47 V
• Package / Case: 504-LBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

xr
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
Figure 61 indicates that Bits 5 through 8, within the M0 byte are allocated for the REI-L function.
The purpose of the REI-L function, within the M0 is two-fold.
The role of REI-L is best presented in the practical example below.
Example:
Consider a “Near-End” LTE that is communicating with a remote LTE. This “Near-End” LTE consists of the
Receive STS-3 TOH Processor block and the Transmit STS-3 TOH Processor block, within a given channel
in
1. It permits a piece of Line Terminating Equipment (LTE), which is transmitting STS-3 data to a remote
2. It permits an LTE (which is receiving STS-3c data from a remote LTE) to inform this remote terminal
the
Line Terminating Equipment, to determine whether or not the remote LTE is receiving its Line
Overhead and STS-3c Envelope capacity bytes, in an error-free manner.
when it is receiving “erred” Line Overhead and STS-3 Envelope capacity bytes; within the incoming
STS-3 frames.
XRT94L33
ATM
UNI/PPP/Mapper
307
IC;
as
depicted
below
XRT94L33
Rev.1.2.0.
in