product description cisco ip phone 8861 voip phone product type voip phone compatible platforms cisco business edition 6000 cordless phone standard ieee 80211a b g n ac wi fi main features multiple voip protocol support integrated ethernet switch voip protocols sip rtp sdp voice codecs g722 g729a g711u g711a ilbc isac lines supported 5 lines intercom yes speakerphone yes digital duplex call services voice mail caller id call waiting cal