SimilarityRank
VoIP 0.903 13975
VOIP 0.895 38302
PSTN 0.869 70140
telephony 0.856 28130
Telephony 0.845 74891
ISDN 0.827 57455
Asterisk 0.821 57059
Mitel 0.805 89951
trunking 0.797 85801
RingCentral 0.794 80228
IP-based 0.791 68683
SIP 0.787 25114
Lync 0.777 52221
WAN 0.761 36010
IVR 0.759 50142
Ethernet 0.759 14958
LANs 0.752 83650
Polycom 0.750 77376
Voicemail 0.748 85444
Avaya 0.746 52110
VPN 0.745 16155
landline 0.743 30616
MPLS 0.741 55681
ADSL 0.739 42834
routers 0.732 22931