VoIP service applications in FTTH PON network

VoIP Service Application

  The FOT OLT supports VoIP functions, providing voice services with carrier class quality, and allowing IP-based voice service access.
The OLT product series support MGCP, H.248 and SIP, and its softswitch interface can be connected to MGC gateways produced by various mainstream manufacturers. See following figure for an illustration of the FOT OLT’s VoIP service application network.

VoIP service in FTTH PON application

VoIP service in FTTH PON application

  When a standard analogue telephone is attached to the RJ-11 port of an ONU and VoIP services are configured, the ONU will: perform analogue to digital conversion of the voice signal, encode the digital stream as appropriate, perform a speech compression algorithm to minimize bandwidth requirements, and encapsulate the voice data in an IP packet for transmission to the providers network through the OLT.
  The VoIP call will be established via the external softswitch (Or Sip server).

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