Features

• Multiplex statistically 8, 16 or 24 async channels onto a single sync link
• Asynchronous channel data rates up to 19.2 kbps
• Composite link data rate up to 64 kbps
• Composite link interfaces: V.24/RS-232, V.35, X.21 and RS-530
• Independent hard and soft flow control for each channel
• Control signal passed end-to-end, bi-directional
• Menu controlled configuration and diagnostics
• Downloading of system parameters
• Permanent storage for system parameters
• Password secured access

Description

• 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