My cynical friend sent me a note about the history of WhatsApp. He was complaining that “We in the IETF presence community” missed the opportunity.
I am not sure that’s accurate, but it is a good starting point for this article.
In the past he would point to Skype as a lesson to be learned.
You see ‘presence’ only if it is accurate and contextual. However, in telecom services the detection of presence has not been a priority. SS7 was built to protect the network, not complete the call. SS7 serves the function of call completion but its history is to defend against phone hacks and manage congestion. As an add-on because of wireless power range, the use of SS7 to support SMS (aka text) was developed.
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