Copper to Fiber Network Interface Devices

Network Interface Devices

Service Activation Testing

DEMARC Auto-Configuration for DPoE Networks

Cable MSOs have been successful providing Ethernet Business Services to Small and Medium sized business (SMBs) using the HFC network footprint. Growing this lucrative business services market share with larger enterprises requires networks that can transport symmetrical bandwidth and support the Service OAM and Class of Service functions of Carrier Ethernet. EPON networks are an alternative solution to HFC, but the challenge lies in integrating network management into the DOCSIS OSS and simplifying the deployment of demarcation devices so it’s as easy as the plug-and-play installation of a cable modem.

The iConverter® GM4 Network Interface Device supports the DEMARC Auto-Configuration (DAC) process. As defined in the CableLabs® DOCSIS Provisioning of EPON (DPoE™) DEMARC specification, DAC is the process for a DEMARC device to be automatically provisioned for Ethernet services on the DPoE network.

Cable MSOs can now leverage the existing DOCSIS OSS, the scalability of EPON, and the Service OAM functionality of the DEMARC (Network Interface Device) to accelerate revenue growth from Carrier Ethernet services.

DEMARC Auto-Configuration (DAC)
  • DAC simplifies provisioning of commercial Ethernet and cell tower backhaul services
  • Reduces OPEX by eliminating the needs for truck rolls and qualified technicians
  • Speeds time to market with Plug-and-Play DEMARC installation (like a cable modem)
Supports Pluggable EPON SFPs and standalone DPoE ONUs
  • Simplifies inventory management, and enables flexible deployments

DPoE DAC Lab Trial Results

Omnitron participated in a Time Warner Cable lab trial that demonstrated how automating the provisioning of a DEMARC/NID shortens deployment time and provides tangible operational cost savings.

“Automating the provisioning and circuit turn-up processes has a positive direct impact on the customer’s satisfaction and the service provider’s bottom line. The benefits are found in:

  • Shorter time to delivery – leading to fewer resources required for circuit installation (lowering OPEX), more time spent on revenue generating tasks and increased installation volume (increasing revenue)
  • Shortened equipment replacement times – leading to lower Mean Time To Repair, shortened outage times, less frequent outages, and lower impact on service availability

The indirect benefits of DPoE-based automation are found by reducing human interaction with the functions of the network. Where humans can be removed from the processes, the service provider will achieve improved process and standards compliance, lower network failure rates and more reliable execution of best practices.”

Learn more about DPoE Networks, DEMARC Auto-Configuration and the Time Warner Cable lab trial. Download the SCTE White Paper DAC Overview – Business Service Applications and Benefits presented at the Cable Tec Expo.

Click here to download this white paper

How the DAC Process Works

This DAC process example is based on an iConverter GM4 with a D-ONU, which is an SFP (Small Form-factor Pluggable) transceiver with an EPON ONU built to the DPoE specifications. Stage 1 is only applicable for the pluggable D-ONU, but the subsequent stages are the same for both a pluggable D-ONU and a standalone D-ONU.

DPOE DAC Demarc Auto Configuration

Stage 1: Detect DAC Capabilities of Pluggable ONU

When the pluggable D-ONU is installed in the DEMARC, it identifies itself to the DEMARC through the SFP diagnostic interface. This identification process informs the DEMARC that the pluggable D-ONU supports the DAC process.

Stage 2: Link Layer Discovery Protocol (LLDP)

The D-ONU sends information provided by the DPoE System to the DEMARC using the IEEE Link Layer Discovery Protocol (LLDP). Information sent through the LLDP includes management path (the DEMARC acquires the VLAN ID to establish management communication) and authentication information.

Stage 3: DEMARC Acquires IP Address and Location of File Server via DHCP

The DEMARC connects to the DHCP server and is identified by its MAC address. The DHCP server assigns an IP address to the DEMARC, and provides the location of the file server where the configuration file for the DEMARC is located.

Stage 4: DEMARC Downloads Configuration File from the Server

Once the DEMARC has the location and IP address, it can download the configuration file from the file server.

Stage 5: DEMARC Automatic Provisioning

The DEMARC automatically configures itself based on the configuration file and turns up the Ethernet Virtual Connection (EVC). At this point the DAC process is complete. The service is then tested and validated for SLA assurance. Once validated, the service is ready to be handed over to a customer.


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