Overview
RC7883A1 is a low price product designed on the basis of RC7880A1; The core design and package of RC7883A1 is the same with that of RC7880A1. RC7883A1 provides three kinds of application modes: TM mode, PHY mode and MAP mode. The three modes can be configured by register.
TM mode is suitable for STM-1 terminal multiplexer; PHY mode is suitable for dual STM-1 optical line multiplexer; and MAP mode is suitable for 24 E1 Mapper. For PHY mode, the telecom-bus can work at floating mode, the C1J1/SPE control signal is added, and VC-4 interface can be provided. For MAP mode, two bus control signals are added, which is convenient for the simplified telecom bus extension. For TM (or PHY, or MAP) mode, some useless units will be inhibited.
Comparision between RC7883A1 and RC7880A1
Model | Mode | STM-1 | E1 | VC-4 interface | 1+1 proteciton |
RC7880A1 | ADM | 2 | 24 | not supported | optional |
RC7883A1 | TM | 2 | 24 | not supported | necessary |
RC7883A1 | PHY | 2 | 4 | supported | not supported |
RC7883A1 | MAP | 0 | 24 | not supported | optional |
Feature
Functional Block Diagram
Figure 1 RC7883A1 TM mode
Figure 2 RC7883A1 PHY mode
Figure 3 RC7883A1 MAPPING mode
Application
Figure 1 SDH Terminal Multiplexer Application
Figure 2 SDH Hub application
Figure 3 SDH E1 Mapper application