722 wideband codec. The Innovative wireless antenna layout maintains the calling good quality apparent even on the low wifi coverage. This is actually the reason Grandstream PBX is progressive. resulting from https://georgiapono297441.shoutmyblog.com/29239243/little-known-facts-about-grandstream-dubai-grandstream-grandstream-africa-grandstream-phones-ip-pbx-ip-phone-gsm-gateway