DCB Introduces the industry's first HDLC-Sync to Async converter. The new HSAA-01 converts HDLC synchronous data streams coming from DTE equipment to asynchronous for transmission over satellite, wireless, statistical multiplexer and other asynchronous links. The unit has synchronous port speed up to 128 Kbps and asychronous speeds of up to 115.2 Kbps. There are many sync-to-async converters on the market that allow asynchronous traffic to be passed over synchronous links; but, this is the only one that operates with a synchronous DTE device and passes the traffic over an asynchronous link. Check out the data sheet.
DCB had a successful role in this balloon mis-adventure, a role that insured scientific success, whether the balloon was eventually recovered or not. The critical data collected in the balloon experiment was transmitted to the ground station via radio using DCB multiplexers. Learn the details of DCB's involvement in this scientific mission by reading this application note.
This tutorial lays to rest a few common myths about wireless links and illustrates the most important points you should consider when beginning a wireless project. Whether you are considering a short hop across the street, or miles between the locations, you should read this. Remember, wireless isn't new to DCB!
Read the application note or look at our index of tutorials and application notes.
This applications note illustrates the use of DCB's SR-DC data concentrator multiplexer in applications that take advantage of its unique features. The data concentrator operates as a statistical multiplexer over one-way links, half-duplex links, and multi-drop links. It is ideal for one-way telemetry, two way data transfer through slow satellite links, and one-way broadcast through multi-drop dds, radio or satellite links. The SR-DC can even be used with a customer provided workstation or PC doing the data decoding and de-multiplexing for a "single-ended" configuration. Read the application note or look at our index of tutorials and application notes.
DCB Introduces its first wireless statistical multiplexer. The new SR-04W wireless statistical multiplexer is ideal for asychronous multiplexing in locations where wiring is expensive or inconvenient. This unit may be called a "multi-port wireless modem". Operating in the 900 Mhz license free ISM band using frequency hopping spread spectrum, the new units are built on the solid SR multiplexer family. This new multiplexer allows up to four asynchronous terminal ports to communicate over the same 115.2 Kbps wireless link. Using the built-in antenna, it's ideal for in-building links up to 1000 feet, or with optional antennae for outdoor links of up to 15 miles. Check out the data sheet.
DCB often provides special purpose power supplies for its equipment. These include power supplies that operate from the -48Vdc station battery in telephone company central offices, foreign country voltages, and solar power installations. Until now, these were available only upon special order. DCB now announces the general availability of the DC input power supplies as standard stock items. Models are available with inputs of 12 Vdc, 24 Vdc, and 48 Vdc. Ground polarity is either positive or negative. The units support all DCB products that are powered using the DIN plug input including eight port and larger access switches and multiplexers and the LL series modems. Read the data sheet.
This applications note illustrates the set up for Utilicom license-free 900 mhz or 2400 mhz ISM band radio-modems and our model 2200 voice/data multiplexer. This configuration allows two telephone channels and two data channels to be used over a single radio link. These links are sometimes suitable for line-of-sight distances of 20 miles or more, and are commonly used over five to ten mile paths. By using a radio link, the monthly telephone bill is eliminated. Read the application note or look at our index of tutorials and application notes.
DCB is now shipping the new Link1 TADILB modem. This V.23 1200 bps modem is available in a PC ISA card or stand-alone version. There is a new 14 slot chassis for the ISA format card, as well as a 3 unit rack mount for the stand-alone unit. This new unit replaces older hard to find V.23 modems in international applications that require leased line v.23 operation, such as NATO, and other military applications. The data sheet is on-line.
DCB is now stocking and shipping the new Loop International TA-2500 Fractional T! DSU. This is the new price leader in the market with a retail price of $895. This new DSU/CSU has all the most wanted features such as Extended Super Frame capability, both front panel LCD and terminal ports configuration, and RS-530 interface. Opational SNMP is also available. Check it out by reading the datasheet.
The new DCB SR-DC Data Concentrator combines multiplexing with one-way communications lines to provide data concentration of from 8 to 32 ports over a single data line running speed up to 128Kbps synchronous and asynchronous composites. The system works with concentrators on both ends of the system, or single-ended with PC software de-multiplexing the composite at one end.
This is ideal for satellite links where round-trip time is too slow for conventional multiplexers to work effectively and is also useful for data broadcasting, one-way multiplexing using a multi-drop or radio system to feed multiple receiving units from a single source unit.
This is an actual on-line connection to real DCB equipment. By using our EtherPath ethernet to RS-232 server connected to an Access Switch, you can telnet to the Access Switch, select management ports on various DCB products, control power switches, and even configure the equipment... right now through the Internet! This is a good way to evaluate the Etherpath, Access Switch, and Access Power Switch functionality, as well as check out the easy management and configuration functionality of our multiplexers. Go to the applications note to get the IP address and full instructions. There's even an easy-start button there.
Merchant's Tire is a retail and wholesale tire distributor headquartered in Manassas, VA, servicing
Virginia and the surrounding states. They run accounting and inventory applications on Sun servers, with
dedicated frame relay links to their primary stores. These links are mission-critical and outages are not
acceptable. The frame relay links use the DCB SR frame relay asynchronous frad multiplexers to connect
the terminals and printers in each store to the host location.
See the pictures, learn the details by reading this applications note!
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