Wavecom W74PC User Manual

WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V9.1.0 Transmission Modes
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The “Confidence” (max. value 100) shows the overall decoding quality.
A TETRAPOL terminals can operate in three different modes: Network Mode, Repeat Mode and Direct
Mode. In the Network Mode, a Base Station (BS) transmits one Control Channel (CCH) and several Traffic
Channels (TCH), which can be in total up to 24 radio channels. Frames are organised in Superframes, with
a 4 second period (or 200 frames), which is synchronized by special frames in CCH, e.g., Paging Channel
(PCH) and Broadcast Channel (BCH) frames. Repeat Mode is a special form of Network Mode, with only
TCH frames and Direct Mode is operated between two terminals in half duplex mode.
The Control Channel (CCH) as shown in Fig. 1 contains BCH (Broadcast CHannel), SDCH (Signalling and
Data CHannel), DACH (Dynamic random Access CHannel), PCH (Paging CHannel), RCH (Random access
answer CHannel) and RACH (Random Access CHannel). The other type is Traffic Channel (TCH), which can
be specific as Voice Channel (Fig. 2) and Data Channel. It contains SCH (Signalling CHannel), SCH/TI
(Signalling CHannel/Transmitter Interruption), and Voice/Data Channel.
Fig. 1 Control Channel Mode

Wavecom W74PC Specifications

General

Brand	Wavecom
Model	W74PC
Category	Media Converter
Language	English