User guide

188 RealCT Direct API Developer Guide
Chapter 6: MVIP-95
Understanding H.100 Architecture
H.100 is a high-speed hardware standard. Previous to H.100
there were two telephony bus standards: MVIP and SCSA.
Boards with an MVIP bus could not communicate with boards
using a SCSA bus. Boards using either the MVIP or SCSA
standard can communicate through the H.100 bus, however,
allowing developers to have boards from different vendors in a
single bus.
The H.100 bus supports 32 8.192-Mb/s streams, as shown in
Figure 38. Each H.100 stream has a maximum of 128 64-Kb/s
time division multiplexed slots, each of which supports a single
resource. (128 slots x 64 Kb/s/slot = 8.192 Mb/s). Each slot
within a specific stream is called a timeslot. Each timeslot on
the H.100 bus can carry voice data between resources.
Figure 38. Data Streams in an H.100 Bus
When you adjust the stream speed, you change the number of
timeslots the stream allocates. This provides compatibility with
the MVIP bus, which only provides 32 timeslots per stream. For
more information about how to adjust the stream speed, see
Configuring the H.100 Bus Speed on page 204.
A
A
32 Streams
128 Timeslots