General instructions regarding communication between your device and Setera Onecloud servers in AWS Platform.


  • Disable SIP ALG from your firewall/router
    • This feature can also be found with these names
      • SIP-Inspection
      • SIP-Helper
  • Make sure that your devices can connect to external NTP servers
  • Make sure that your devices can connect to DNS server and they are able to resolve DNS records
  • If you are using mobile client with mvoip feature, please make sure that your firewall allows Android Firebase Cloud Messaging (FCM) or Apple push notifications:
  • Should you encounter connectivity issues with Setera Onecloud, please analyze your network logs and see if packets are being dropped from source 185.255.33.208/28


Traffic from You to Setera Onecloud

ProtocolTransportSourceSource Port
DestinationDestination PortUsed for
SIPTCPYour network1024-65535185.255.33.208/285061SIP Signalling
RTPUDPYour network1024-65535185.255.33.208/281024-65535Media / Speech
HTTPSTCPYour network1024-65535185.255.33.208/28443Service management (call logs, presence states, etc.)
HTTPTCPYour network1024-6553589.18.235.149/3280SIP phone firmware
HTTPSTCPYour network1024-6553589.18.235.149/32443SIP phone firmware
HTTPSTCPYour network1024-65535rcs.aastra.com443Mitel deskphone provisioning



Traffic from Setera Onecloud to You

ProtocolTransportSourceSource Port
DestinationDestination PortUsed for
SIPTCP185.255.33.208/281024-65535Your network5061SIP Signalling
RTPUDP185.255.33.208/2849152-65535Your networkcheck list belowMedia / Speech


  • RTP ports based on device types
    • Softphone range
      •  10000 - 20000
    • Mitel deskphone start port
      • 3000
    • Snom deskphone range
      • 49152 - 65534
    • Mitel SIP-dect start port
      • 16320