Cisco offers VoIP Call Manager 5.0

Cisco announces Call Manager 5.0 to support SIP Ip Telephony protocol.

According to Network World:

"Today, Cisco is the only major networking vendor not to support SIP phones with its corporate telephony server. Both Avaya and Nortel Networks already deliver SIP support, although through proprietary extensions. Cisco phones must use Cisco's Skinny Client Control Protocol (SCCP), an H.323- derived protocol lacking presence, IM, and many of the convergence capabilities readily available in the SIP/SIP for Instant Messaging and Presence Leveraging Extensions (SIMPLE) environments."

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