480 Temporarily Unavailable – No In/Outbound calls.
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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 […]