SPL RS-232 DataHub
Concentrator for SPL and SR multiplexers
- Concentrates up to 8 SPL or SR Multiplexer outputs over a single communications
line
- Synchronous network link to 64 Kbps
- Port speeds to 38,400 bps
- Synchronous or asynchronous tail circuits
- Reduces monthly leased line charges
- Network management port
- Individual port IDs
- Remote set up and testing
- 2 to 8 channels
- No additional network overhead
The SPL HUBs concentrate 2 to 8 SPL or SR multiplexers over a synchronous
full duplex composite up to 64 Kbps. Users can use a "star" or
"straight line" configuration to distribute clusters of terminals
and printers in a economical way. HUBs eliminate multiple communication
lines to a locale or the duplication of communication line services
on a "straight line" application. Savings on recurring line charges
quickly pay for the HUB system and reduce the total fees subject to rate
increases.
The SPL HUBs use a statistical time division method to concentrate the SPL
or SR multiplexer composites. This method insures full bandwidth utilization
and no degradation in response to the users attached to the multiplexers.
The only limiting factor is the speed of the composite. With the availability
of 56 Kbps digital service at "analog prices" users can take full
advantage of this high speed service offering and save money.
Port connections to the SPL HUB can be direct connect SPL or SR multiplexers,
synchronous or asynchronous, leased or dial-up lines, conventional or short
haul modems, or digital service up to 38,400 bps.
The flexibility of the HUB allows the user to tailor the system to
take advantage of local line offerings and pricing while saving on
overall communications costs.
In the "star" configuration, SPL HUBs allow up to 8 SPL or SR
multiplexers spread throughout a remote metropolitan area or building to
share 1 high speed communication line back to the host site. This configuration
eliminates the duplicate communication lines to a single metropolitan area.
In the "straight line" configuration, the SPL HUBs allow the connection
of three sites in a "straight line" without duplicating the communication
line to the first remote site. This capability can save significant communication
costs especially if the first remote site is a significant distance from
the host site.
Specifications
Statistical multiplexing of SPL or SR composites
2, 4, 6 or 8 ports
Ports
Synchronous Rates: Follows modem clocks to 38,400 bps
Asynchronous Rates: 300, 1200,2400,4800, 9600, 19200, 38400 bps individually selectable
per port
Interface: CCITT V.24, RS-232-D
Connectors: DB-25 female
Buffering: 64K dynamically allocated
Tail Circuits:
Must be full duplex
May be leased line, dial-up or digital
May be asynchronous or synchronous
Network
Rates: Follows modem/DSU clock to 64 Kbps synchronous
Interface: CCITT V.24, RS-232-D
Connector: DB-25 male
Modes
Normal on-line
Network loopback
Indicators
Power, Transmit Condition, Receive Error,
Multiplexing, Test, Port Activity
Management
Interface: CCITT V.24, RS-232-D
Connector: DE-9 female
Management Port Commands
Help Screen
Help Ports
Executive Parity
Network Loopback
Set Time
LOCAL & REMOTE:
Show Configuration
Configure Ports
Device Type
Identification
Port ID
Reset
Physical Electrical
Power requirements: 120 VAC, 30-40 Watts, .25 - .36 Amps
10 1/4" x 9 3/4" x 2 1/4" (2-6 ports)
10 1/4" x 9 3/4" x 4 1/2" (8 ports)
Rear view of DCB SPL HUB
HOST or REMOTE:
| SPL-02 | 2 Port Hub
|
| SPL-04 | 4 Port Hub
|
| SPL-06 | 6 Port Hub
|
| SPL-08 | 8 Port Hub
|
| SPL-10 | 10 Port Hub
|
DCB Products