DT-6061 Embedded Network Processor

IP-SLM-BX.25 to TCP-IP Application



The IP-SLM is software emulation of the BNS BX.25 interface that is also known as the Synchronous Line Module (SLM).The IP-SLM application allows low cost and high density access points to terminate BX.25 interfaces common to Network Elements.The result is significant cost savings and administrative simplication.The IP-SLM is also a migration vehicle which enables the reduction or elimination of proprietary network components for the Network Element support functionality.

What are DT-6061 and DT-6160?

The DT-6061 and DT-6160 are embedded Network Processors which applies customer specific protocol operations (protocol translation and termination) of network connections that require such a function in a distributed network.

  What is IP-SLM Application?

The IP-SLM is an application which operates on the DT- 6061 embedded network processor. The DT-6061 and DT-6160 has no endpoint interfaces for the BX.25 network elements.These may be provided in many ways. Similarly, the Operations System resides on the BNS network. It requires a BNS UMI (Universal Mediation Interface) module to communicate with the IP-SLM application.There is one connection to the OS, and one connection to the BX.25 port for each network element link.

In the first diagram, the IP network may be a simple hub if a private network is desired.The DT-4000 ports are used to connect the BX.25 network elements.These may be co-located with the DT-6061 or DT-6160, or may be co-located with the Network Element, as is required.The UMI provides the connectivity to the Operations Systems.



Some deployments may currently use a SAM concentrator to initially connect the BX.25.When such a condition exists, it is sometimes more cost effective to provide BX.25 connectivity via the existing SAMs.The second diagram provides for this drop-in situation:

In the second diagram, the SAMs that reside with the Network Elements acquire the BX.25 and transport it to the DT-6061 or DT-6160 IP-SLM application via the UMI module. This configuration is identical to the original typical configuration with the exception that the node co-resident SAM and the SLMs have been replaced with the DT-6061 or DT-6160 and the UMI modules.

The reason the number of Network Element ports per UMI is less than the DT-4000 solution is that both the BX.25 connection and the OS connection traverse the UMI. In the DT-4000 deployment, the BX.25 connection is direct between the DT-4000 and

  the DT-6061 or DT-6160. It should be noted that a DT-4000 may also be used in its SAM emulation role. In that situation, the UMI would still have the SAM deployment characteristics and support 252 Network Elements.The baud rate per Network Element port would be as provided by the DT-4000 (up to 115.2Kbps).

IP-SLM Features

  • Eliminates the need for future SLM set investment.
  • Frees up slots in existing BNS/VCS Nodes that are currently dedicated to SLM modules.
  • Provides for cost-effective migration from the proprietary legacy networks to a more open architectured IP infrastructure.
  • Reduces costs per BX.25 connection. Supports up to 30 9600 baud SLM connections per DT-6061 or DT-6160.
  • Seamless "Drop-In" installation minimizes impact on BNS/Datakit Network. new stuff


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