Today there is great demand for VoIP (Voice over IF) to use on IP network e
ffectively with data traffic, for reducing cost of network operation and in
troducing multimedia services. Especially on the WAN (Wide Area Network), v
oice and data are combined on one network to reduce TCO (Total Cost of Owne
rship). NEC developed ToIP (Telephony over IF) WAN Solution products, which
offer voice services on IP Network for NEAX2000 IVS2/NEAX2400IPX.