#Lync Question 8: Why do I need a gateway device

A gateway device is required in a Lync Server deployment generally for PSTN connectivity, however might be required at a location for the one or more of the following reasons:

  • PSTN Connectivity (T1/E1/POTS/SIP Trunking)
  • Connectivity to PBX’s or Unsupported IP-PBX
  • Survivability (WAN outage)
  • Connectivity for existing SIP headsets
  • Optimisation of media traffic for users at a location (Media Bypass)
  • Normalising of numbering between Lync and foreign network systems
  • SIP normalization via SIP message and header manipulation
  • Support Analogue Devices
    • Fax Machines
    • Conference Phones
    • Alarm Systems
    • Data Modem
    • Credit Card Machines
  • Transcoding of media between Codec’s
  • Conversion of different signalling types and protocols
  • Management of Call Routing
  • Regulatory Requirements
  • In-Country Regulation prohibiting the use of VoIP services (or VoIP restrictions)
  • SIP Trunking
    • In-Country Emergency Dialling (where it cannot be provided by SIP trunking provider)
    • In-Country Short-Number Dialling (where it cannot be provided by SIP trunking provider)
    • Issues with call forwarding issues
    • Security (to protect corporate network from the SIP trunk providers network)
  • Session Border Controller (when using distributed SIP trunking)
    • NAT transversal (when using SIP trunking across the Internet)
    • Connectivity to SIP trunking provider
    • Enhanced Management (Session Limits, Routing Paths)
    • IPv4 to IPv6 Internetworking
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One thought on “#Lync Question 8: Why do I need a gateway device

  1. Pingback: ariprotheroe: #Lync Question 8: Why do I need a gateway device « Lync News

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