Usually, the 2nd option is used when CFS and MiaRec are located in different network segments and a direct communication is forbidden between those segments. In this case, Perimeta SBC is used as a SIP Proxy between CFS and MiaRec.
If both CFS and MiaRec servers are located within the same network, then we recommend to use the 1st option as it is easier to configure and maintain.
Figure 1. A direct connection of Metaswitch CFS to MiaRec recorder
Figure 2. Perimeta SBC as a SIP Proxy between CFS and MiaRec recorder