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STM-8H, STM-16H, STM-24H
8, 16, and 24-Channel
High Speed Statistical Multiplexers |
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- The STM high speed
statistical multiplexers, integrate up to 24
asynchronous channels onto a single synchronous
link. Three models are available:
- STM-8 with 8
asynchronous channels
- STM-16 with 16
asynchronous channels
- STM-24 with 24
asynchronous channels.
- The channel data rates
are from 75 bps up to 19.2 kbps. The synchronous
composite link operates at up to 64 kbps and has
four selectable interfaces:
- V.24/RS-232
- V.35
- X.21
- RS-530.
- Powerful error
detection and automatic retransmission ensures error
free performance.
- The STMs feature
independent hard and soft flow control for each
channel. End-to-end flow control can be initiated
from DTE to DTE or from the STM channel to the
remote DTE. Several characters for X-ON and X-OFF
are provided, enabling compatibility with most
applications.
- Any sub-channel can be
used as a command port to configure the entire
system or to perform diagnostic tests. Password
secured access prevents unauthorized alteration of
the system configuration.
- The STMs feature
permanent storage of the user-programmed system
configuration, using non-volatile memory and
downloading of the configuration parameters.
- Comprehensive
diagnostic capabilities provide local and remote
loopbacks on the sub-channels or on the composite
channel, as well as testing of the modems between
two STM units.
- The STMs are designed
for desktop or 19" rack installation.
Sub-channel connections are made via RJ-45
connectors located on the front panel.
- The STMs can be
connected to RAD's APS and SPS packet switching
products for expanding the number of async channels
in PAD/FRAD applications.
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