When ordering a hosted Asterisk or Freeswitch server, select the data center with the lowest average ping time for best VoIP quality.
When choosing a SIP trunk provider, we strongly suggest providers with media direct audio connections to the telecom carriers for lowest latency and best quality. One such provider is flowroute.com.
Total call latency without media direct = latency from SIP phone to PBX + PBX to SIP trunk provider+ SIP trunk provider to telecom carrier.
Total call latency with media direct = latency from SIP phone to PBX + PBX to telecom carrier.