User Manual

RPC Installation RPC/RP Manual

WLL-RPC/RP-IN/UM-1.0 19June2000

Figure 2-9: Application Module Layout

2.1.2.5 ADPCM Highway

The ADPCM (Adaptive Differential Pulse Code Modulation) highway is the

synchronous time multiplex digital voice/data path, and consists of up-stream and

down-stream for Time Switch on the ECNT card. Time Switch and the digital

voice and data paths on the E1IF cards and the RPIF cards are connected by the

ADPCM highway.

There are 8 ADPCM highways in an RPC. Half of them are assigned for E1IF

cards, and the rest are assigned for RPIF cards. The bit rate of an ADPCM

highway is 2048 kbps, and the frame repetition rate is 8 kHz.

2.2 System Construction

An RPC has two types of installation scenarios:

• Rack mount

• Stand-alone