480 Temporarily Unavailable – No In/Outbound calls.
Learn 3 strategies to help you find ways and understand the 480 SIP Responses By the end of this post “480 Temporarily Unavailable – No inbound/outbound calls.”, you have learned one of the probable causes to why some Service Providers reply with a “480 Temporarily Unavailable” to any incoming calls or with a “480 SIPS […]