Network considerations Poor audio and video quality might result from insufficient bandwidth on your network. Lifesize recommends that your network be capable of at least 1 Mb/s (incoming and outgoing) for a high definition video call. During video calls with lower bandwidths, Lifesize video systems automatically select the best resolution that can be achieved with the available bandwidth. If you intend to use domain addresses for placing calls, either configure a DNS server or use a DHCP server that automatically sets a DNS server. The Lifesize default DNS server is 220.127.116.11.