It operates Asterisk, and call recording is cost-free. You can find GSM help, which might assist in failover cases – and assistance is unlimited to dealers/resellers/VARs/MSPs. Some mobile phone forms are supported, https://janetkcv283214.blogdeazar.com/29268545/the-definitive-guide-to-yeastar-dubai-gsm-gateway-analog-voip-gateway-pbx-module