YTD439 Datasheet, PDF (10/15 Pages) List of Unclassifed Manufacturers – ISDN BRI controller for Terminal Equipment with built-in DSU

The data path in the TD Switch Block diagram is set assuming the following application
example.
Voice call and voice monitor using the B1 channel
B1 channel (downward) → Output PCM highway time slot 0 : CHI_6 → CHO_0
→ B channel data control block (CH-A) : CHI_6 → CHO_4
B1 channel (upward) ← Input PCM highway time slot 0
: CHO_6 ← CHI_0
Data communication using the B2 channel
B2 channel (downward) → B channel data control block (CH-B) : CHI_7 → CHO_5
B2 channel (upward) ← B channel data control block (CH-B) : CHO_7 ← CHI_5
- 10 -