Product description "Frap Tools - CGM Link System Group-to-Group Extension"
With this cable it is possible to connect more than one group to the CGM Master. The group-to-group jacks are arranged to allow a group configuration of about 72 HP, which allows up to 4 QSCs.It is possible to daisy chain additional GG extensions together to add a fourth group, for example, or to connect groups with larger channel configurations of up to eight QSCs.