| Similarity | Rank | |
|---|---|---|
| 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 |