Digital Link Adds In-Band Management Functionality to its Highly Successful Solo Family of Products; New Capability Enhances Versatility, Cost-Effectiveness Of Solo T1 and Solo 56/64 DSU/CSUs.SUNNYVALE, Calif.--(BUSINESS WIRE)--February 18, 1997--Digital Link Corporation, a leading provider of Wide Area Networking (WAN) access equipment, today announced the introduction of the Solo 56/64 Data Service Unit/Channel Service Unit (DSU/CSU (Digital (or Data) Service Unit/Channel Service Unit) A pair of communications devices that connect an inhouse line to an external digital circuit (T1, DDS, etc.). ) and the Solo T1 DSU/CSU with in-band management capabilities for Frame Relay service and Cisco HDLC packets. The in-band Frame Relay and in-band Cisco HDLC management features provide a complete end-to-end path for SNMP (Simple Network Management Protocol) A widely used network monitoring and control protocol. Data are passed from SNMP agents, which are hardware and/or software processes reporting activity in each network device (hub, router, bridge, etc. or Telnet management sessions. Because SNMP management takes place in the data path, these in-band capabilities remove the need for external hardware devices such as terminal servers. In-band also eliminates the need for Ethernet hub ports or router aux port connections to manage the Solo DSU/CSUs. "Digital Link offers a very broad range of management access methods and capabilities on its DSU 1. (communications) DSU - Data Service Unit. 2. DSU - Disk Subsystem Unit (Artecon). 3. (humour) DSU - Dwarf Storage Unit. family of products," said Jack Musgrove, vice president of marketing for Digital Link. "We also offer a lifetime warranty on both the Solo 56/64 and the Solo T1 to back up our belief that they are the most reliable, versatile and highest quality DSU/CSU solutions for 56 Kbps or T1 access." Both the Solo 56/64 and the Solo T1 are single data port DSU/CSUs and are ideal for connecting data terminal equipment (DTE (Data Terminating Equipment) A communications device that is the source or destination of signals on a network. It is typically a terminal or computer. Contrast with DCE.  DTE - Data Terminal Equipment ), such as bridges and routers, to Internet and Frame Relay network services. The Solo 56/64 also provides a cost-effective 56 Kbps interface to DDS (1) (Digital Data Storage) See DAT. (2) (Data Dictionary System) See QuickBuild and OpenDDS. (3) (Dataphone Digital S networks, while the Solo T1 DSU/CSU delivers the power of a fully-featured DSU/CSU to T1 and fractional T1 networks. The Solo T1 DSU/CSU supports the conversion of V.35, RS449 and EIA-530 compatible DTE signals to ANSI (American National Standards Institute, New York, www.ansi.org) A membership organization founded in 1918 that coordinates the development of U.S. voluntary national standards in both the private and public sectors. It is the U.S. member body to ISO and IEC. T1.403 compatible T1 signals. Extensive Monitoring and Diagnostics Both the Solo 56/64 and Solo T1 DSU/CSUs provide bi-directional monitoring of IP traffic and recognize management packets received on the DTE or network ports while remaining transparent to LAN (Local Area Network) A communications network that serves users within a confined geographical area. The "clients" are the user's workstations typically running Windows, although Mac and Linux clients are also used. data stream traffic, encapsulated SNA (Systems Network Architecture) IBM's mainframe network standards introduced in 1974. Originally a centralized architecture with a host computer controlling many terminals, enhancements, such as APPN and APPC (LU 6. or other data. The DSU/CSUs respond to the requesting address with appropriate packets and therefore the user does not require an additional DLCI (Data Link Connection Identifier) The number of a private or switched virtual circuit in a frame relay network. Located in the frame header, the DLCI field identifies which logical circuit the data travels over, and each DLCI has a committed information rate allocation for a unit. The DSU/CSUs look for its specific IP address and responds to the DLCI received. This reuse of a DLCI resource saves money for Frame Relay network access. Added monitoring capabilities specific to the Frame Relay and Cisco protocols include the percentage link utilization for both the receive and transmit directions. This information helps network administrators to monitor the load level and available capacity on the WAN port to make adjustments in the future. The Solo 56/64 and Solo T1 also feature user-selected alarm parameters and performance thresholds for remote alarm reporting. The DSU/CSU reports these messages to the central site through direct serial connection, a modem connection or through Digital Link's in-band communications link. Comprehensive Network Management Network managers can manage either DSU/CSU from a local VT100-compatible or Telnet terminal, or from a management station located at a central site. The products feature an industry-standard SNMP Management Information Base (MIB (1) (Management Information Base) The hierarchical database used by the simple network management protocol (SNMP) to describe the particular device being monitored. MIB objects are identified using ASN.1 syntax. See SNMP, RMON, OID and ASN.1. II) as well as a device-specific enterprise MIB that allows them to configure, monitor and control all significant operating parameters. Network administrators can easily integrate Digital Link's enterprise MIB with popular SNMP management packages, such as Hewlett-Packard's HP OpenView or SunSoft's SunNet Manager. This allows enterprise-wide management of Solo 56/64 and Solo T1 parameters from any compatible SNMP management system. The Solo 56/64 DSU/CSU and the Solo T1 DSU/CSU are supported by Digital Link's WANview Network Management System. Pricing and Availability Both the Solo 56/64 DSU/CSU and the Solo T1 DSU/CSU are available as stand-alone units or as modules that plug into the Ensemble WAN Access System. Both DSU/CSUs are available immediately through authorized Digital Link sales channels and readily support point-to-network and multi-point configurations. The Solo 56/64 DSU/CSU is listed at $999 for the stand-alone product and $949 for the Ensemble WAN Access System module. The Solo T1 DSU/CSU is listed at $1,799 for the stand-alone product and $1,749 for the plug-in module. About Digital Link Digital Link Corporation (NASDAQ NASDAQ in full National Association of Securities Dealers Automated Quotations U.S. market for over-the-counter securities. Established in 1971 by the National Association of Securities Dealers (NASD), NASDAQ is an automated quotation system that reports on :DLNK DLNK Digital Link DLNK Destination Link ) designs, manufactures, markets and supports a broad range of high-speed digital access products, ranging from 56 Kbps to 155 Mbps for global wide area networks. The company's products are used by service providers as infrastructure equipment and by business enterprises for connectivity to WAN services, such as leased lines, Frame Relay, SMDS (Switched Multimegabit Data Service) A high-speed, switched data communications service offered by the local telephone companies for interconnecting LANs in different locations. It was introduced in 1992 and became generally available nationwide by 1995. and ATM. Digital Link is headquartered in Sunnyvale, Calif. with worldwide sales offices in the UK, Germany and Hong Kong. CONTACT: Leslie Conley Digital Link 408/745-4195 lconley@dl.com or Julie Hart Stirling & Cohan 209/725-8298 JulieMHart@aol.com |
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