SIP Trunking to or from NG911

A SIP trunk is setup between MX-ONE and MBG and between MBG and the NG911 provider.

For redundancy purpose, the NG911 providers offers two point of presences (two different locations). It is recommended that two SIP trunks are setup between MBG and NG911 provider. For this case, MX-ONE can have only one SIP trunk towards MBG and the round robin mechanism in the MX-ONE SIP trunk can provide load balancing functions between the SIP trunks. For example, the first call goes to point of presence 1 and the second goes to the point of presence 2.

Another approach is to use two SIP trunks between MX-ONE and MBG and two SIP trunks between MBG and the points of presence (PoP).