SimilarityRank
VOIP 0.971 38302
PBX 0.903 33153
telephony 0.897 28130
Telephony 0.885 74891
PSTN 0.876 70140
IP-based 0.841 68683
Vonage 0.840 66190
RingCentral 0.833 80228
ISDN 0.813 57455
SIP 0.807 25114
ADSL 0.803 42834
Mitel 0.800 89951
DSL 0.798 22977
landline 0.796 30616
WLAN 0.794 52152
WiMAX 0.793 52149
trunking 0.785 85801
VPN 0.782 16155
wireless 0.778 3977
IPTV 0.778 42631
Asterisk 0.778 57059
WAP 0.778 52594
Polycom 0.776 77376
Skype's 0.776 99490
Conferencing 0.774 59393