Initial research has identified E9-1-1 for MLTS service offerings from LECs, VoIP service providers, equipment manufacturers and third-party vendors, which provide automatic location identification for MLTS callers. However, it is not known how extensive in California's business line, subscribers have voluntarily adopted these E9-1-1 solutions by California's business line subscribers. The following review will assist business owners and other interested parties in identifying the availability of the different solutions for each type of MLTS.