SIP has competition. Should it be scared or go about its business? Security is another issue to be concerned with. Here is an article that briefly touches on SIP and what could possibly threaten the burgeoning session initiation protocol standard.

My take is the biggest competition to SIP is Skype. Niklas Zennstrom said at a past Internet Telephony Conference that here are more Skype endpoints than SIP endpoints. Can Skype single-handedly take on virtually all other vendors including Microsoft, Avaya and more recently Linksys? It will be interesting to watch.

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