SimilarityRank
VoIP 0.971 13975
PBX 0.895 33153
telephony 0.888 28130
PSTN 0.878 70140
Telephony 0.864 74891
Vonage 0.858 66190
ISDN 0.843 57455
ADSL 0.818 42834
landline 0.818 30616
DSL 0.815 22977
voip 0.810 80444
RingCentral 0.809 80228
IP-based 0.802 68683
dial-up 0.800 36734
VPN 0.787 16155
Skype 0.785 10670
GPRS 0.785 41744
WAP 0.784 52594
dialup 0.784 72584
wireless 0.784 3977
landlines 0.781 67187
Voicemail 0.779 85444
modems 0.779 36956
WLAN 0.777 52152
conferencing 0.777 18899